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rfc:rfc2021

Network Working Group S. Waldbusser Request for Comments: 2021 INS Category: Standards Track January 1997

       Remote Network Monitoring Management Information Base
                             Version 2
                            using SMIv2

Status of this Memo

 This document specifies an Internet standards track protocol for the
 Internet community, and requests discussion and suggestions for
 improvements.  Please refer to the current edition of the "Internet
 Official Protocol Standards" (STD 1) for the standardization state
 and status of this protocol.  Distribution of this memo is unlimited.

Abstract

 This memo defines a portion of the Management Information Base (MIB)
 for use with network management protocols in TCP/IP-based internets.
 In particular, it defines objects for managing remote network
 monitoring devices.

Table of Contents

1 The Network Management Framework …………………. 2 2 Overview ………………………………………. 2 2.1 Remote Network Management Goals ………………… 3 2.2 Structure of MIB ……………………………… 5 3 Control of Remote Network Monitoring Devices ………. 6 3.1 Resource Sharing Among Multiple Management Sta-

   tions ..............................................    7

3.2 Row Addition Among Multiple Management Stations ….. 9 4 Conventions ……………………………………. 10 5 RMON 2 Conventions ……………………………… 10 5.1 Usage of the term Application Level …………….. 10 5.2 Protocol Directory and Limited Extensibility …….. 11 5.3 Errors in packets …………………………….. 11 6 Definitions ……………………………………. 12 7 Security Considerations …………………………. 122 8 Appendix - TimeFilter Implementation Notes ……….. 123 9 Acknowledgments ……………………………….. 129 10 References ……………………………………. 129 11 Author's Address……………………………….. 130

Waldbusser Standards Track [Page 1] RFC 2021 Remote Network Monitoring MIB January 1997

1. The Network Management Framework

 The Internet-standard Network Management Framework consists of three
 components.  They are:
 RFC 1902 [1] which defines the SMI, the mechanisms used for
 describing and naming objects for the purpose of management.
 RFC 1213, STD 17, [3] which defines MIB-II, the core set of
 managed objects for the Internet suite of protocols.
 RFC 1905 [4] which defines the SNMP, the protocol used for
 network access to managed objects.
 The Framework permits new objects to be defined for the purpose of
 experimentation and evaluation.
 Managed objects are accessed via a virtual information store, termed
 the Management Information Base or MIB.  Within a given MIB module,
 objects are defined using the SMI's OBJECT-TYPE macro.  At a minimum,
 each object has a name, a syntax, an access-level, and an
 implementation-status.
 The name is an object identifier, an administratively assigned name,
 which specifies an object type.  The object type together with an
 object instance serves to uniquely identify a specific instantiation
 of the object.  For human convenience, we often use a textual string,
 termed the object descriptor, to also refer to the object type.
 The syntax of an object type defines the abstract data structure
 corresponding to that object type.  The ASN.1 [6] language is used
 for this purpose.  However, RFC 1902 purposely restricts the ASN.1
 constructs which may be used.  These restrictions are explicitly made
 for simplicity.
 The access-level of an object type defines whether it makes "protocol
 sense" to read and/or write the value of an instance of the object
 type.  (This access-level is independent of any administrative
 authorization policy.)
 The implementation-status of an object type indicates whether the
 object is mandatory, optional, obsolete, or deprecated.

2. Overview

 This document continues the architecture created in the RMON MIB [RFC
 1757] by providing a major feature upgrade, primarily by providing
 RMON analysis up to the application layer.

Waldbusser Standards Track [Page 2] RFC 2021 Remote Network Monitoring MIB January 1997

 Remote network monitoring devices, often called monitors or probes,
 are instruments that exist for the purpose of managing a network.
 Often these remote probes are stand-alone devices and devote
 significant internal resources for the sole purpose of managing a
 network.  An organization may employ many of these devices, one per
 network segment, to manage its internet.  In addition, these devices
 may be used for a network management service provider to access a
 client network, often geographically remote.
 The objects defined in this document are intended as an interface
 between an RMON agent and an RMON management application and are not
 intended for direct manipulation by humans.  While some users may
 tolerate the direct display of some of these objects, few will
 tolerate the complexity of manually manipulating objects to
 accomplish row creation.  These functions should be handled by the
 management application.

2.1. Remote Network Management Goals

  o Offline Operation
      There are sometimes conditions when a management
      station will not be in constant contact with its
      remote monitoring devices.  This is sometimes by
      design in an attempt to lower communications costs
      (especially when communicating over a WAN or
      dialup link), or by accident as network failures
      affect the communications between the management
      station and the probe.
      For this reason, this MIB allows a probe to be
      configured to perform diagnostics and to collect
      statistics continuously, even when communication with
      the management station may not be possible or
      efficient.  The probe may then attempt to notify
      the management station when an exceptional condition
      occurs.  Thus, even in circumstances where
      communication between management station and probe is
      not continuous, fault, performance, and configuration
      information may be continuously accumulated and
      communicated to the management station conveniently
      and efficiently.

Waldbusser Standards Track [Page 3] RFC 2021 Remote Network Monitoring MIB January 1997

  o Proactive Monitoring
      Given the resources available on the monitor, it
      is potentially helpful for it continuously to run
      diagnostics and to log network performance.  The
      monitor is always available at the onset of any
      failure.  It can notify the management station of the
      failure and can store historical statistical
      information about the failure.  This historical
      information can be played back by the management
      station in an attempt to perform further diagnosis
      into the cause of the problem.
  o Problem Detection and Reporting
      The monitor can be configured to recognize
      conditions, most notably error conditions, and
      continuously to check for them.  When one of these
      conditions occurs, the event may be logged, and
      management stations may be notified in a number of
      ways.
  o Value Added Data
      Because a remote monitoring device represents a
      network resource dedicated exclusively to network
      management functions, and because it is located
      directly on the monitored portion of the network, the
      remote network monitoring device has the opportunity
      to add significant value to the data it collects.
      For instance, by highlighting those hosts on the
      network that generate the most traffic or errors, the
      probe can give the management station precisely the
      information it needs to solve a class of problems.
  o Multiple Managers
      An organization may have multiple management stations
      for different units of the organization, for different
      functions (e.g. engineering and operations), and in an
      attempt to provide disaster recovery.  Because
      environments with multiple management stations are
      common, the remote network monitoring device has to
      deal with more than own management station,
      potentially using its resources concurrently.

Waldbusser Standards Track [Page 4] RFC 2021 Remote Network Monitoring MIB January 1997

2.2. Structure of MIB

 The objects are arranged into the following groups:
  1. protocol directory
  1. protocol distribution
  1. address mapping
  1. network layer host
  1. network layer matrix
  1. application layer host
  1. application layer matrix
  1. user history
  1. probe configuration
 These groups are the basic units of conformance.  If a remote
 monitoring device implements a group, then it must implement all
 objects in that group.  For example, a managed agent that implements
 the network layer matrix group must implement the nlMatrixSDTable and
 the nlMatrixDSTable.
 Implementations of this MIB must also implement the system and
 interfaces group of MIB-II [3].  MIB-II may also mandate the
 implementation of additional groups.
 These groups are defined to provide a means of assigning object
 identifiers, and to provide a method for managed agents to know which
 objects they must implement.
 This document also contains enhancements to tables defined in the
 RMON MIB [RFC 1757].  These enhancements include:
  1) Adding the DroppedFrames and LastCreateTime
     conventions to each table defined in the RMON MIB.
  2) Augmenting the RMON filter table with a mechanism
     that allows filtering based on an offset from the
     beginning of a particular protocol, even if the
     protocol headers are variable length.

Waldbusser Standards Track [Page 5] RFC 2021 Remote Network Monitoring MIB January 1997

  3) Augmenting the RMON filter and capture status bits
     with additional bits for WAN media and generic media.
     These bits are defined here as:
      Bit     Definition
      6       For WAN media, this bit is set for packets
              coming from one direction and cleared for
              packets coming from the other direction.
              It is an implementation specific matter
              as to which bit is assigned to which
              direction, but it must be consistent for
              all packets received by the agent, and if
              the agent knows which end of the link is
              "local" and which end is "network", the bit
              should be set for packets from the "local"
              side and should be cleared for packets from
              the "network" side.
      7       For any media, this bit is set for any packet
              with a physical layer error. This bit may be
              set in addition to other media-specific bits
              that denote the same condition.
      8       For any media, this bit is set for any packet
              that is too short for the media. This bit may
              be set in addition to other media-specific
              bits that denote the same condition.
      9       For any media, this bit is set for any packet
              that is too long for the media. This bit may
              be set in addition to other media-specific bits
              that denote the same condition.
 These enhancements are implemented by RMON-2 probes that also
 implement RMON and do not add any requirements to probes that are
 compliant to just RMON.

3. Control of Remote Network Monitoring Devices

 Due to the complex nature of the available functions in these
 devices, the functions often need user configuration.  In many cases,
 the function requires parameters to be set up for a data collection
 operation.  The operation can proceed only after these parameters are
 fully set up.
 Many functional groups in this MIB have one or more tables in which
 to set up control parameters, and one or more data tables in which to
 place the results of the operation.  The control tables are typically
 read/write in nature, while the data tables are typically read/only.

Waldbusser Standards Track [Page 6] RFC 2021 Remote Network Monitoring MIB January 1997

 Because the parameters in the control table often describe resulting
 data in the data table, many of the parameters can be modified only
 when the control entry is not active.  Thus, the method for modifying
 these parameters is to de-activate the entry, perform the SNMP Set
 operations to modify the entry, and then re-activate the entry.
 Deleting the control entry causes the deletion of any associated data
 entries, which also gives a convenient method for reclaiming the
 resources used by the associated data.
 Some objects in this MIB provide a mechanism to execute an action on
 the remote monitoring device.  These objects may execute an action as
 a result of a change in the state of the object.  For those objects
 in this MIB, a request to set an object to the same value as it
 currently holds would thus cause no action to occur.
 To facilitate control by multiple managers, resources have to be
 shared among the managers.  These resources are typically the memory
 and computation resources that a function requires.

3.1. Resource Sharing Among Multiple Management Stations

 When multiple management stations wish to use functions that compete
 for a finite amount of resources on a device, a method to facilitate
 this sharing of resources is required.  Potential conflicts include:
  o Two management stations wish to simultaneously use
    resources that together would exceed the capability of
    the device.
  o A management station uses a significant amount of
    resources for a long period of time.
  o A management station uses resources and then crashes,
    forgetting to free the resources so others may
    use them.
 The OwnerString mechanism is provided for each management station
 initiated function in this MIB to avoid these conflicts and to help
 resolve them when they occur.  Each function has a label identifying
 the initiator (owner) of the function.  This label is set by the
 initiator to provide for the following possibilities:
  o A management station may recognize resources it owns
    and no longer needs.
  o A network operator can find the management station that
    owns the resource and negotiate for it to be freed.
  o A network operator may decide to unilaterally free
    resources another network operator has reserved.

Waldbusser Standards Track [Page 7] RFC 2021 Remote Network Monitoring MIB January 1997

  o Upon initialization, a management station may recognize
    resources it had reserved in the past.  With this
    information it may free the resources if it no longer
    needs them.
 Management stations and probes should support any format of the owner
 string dictated by the local policy of the organization.  It is
 suggested that this name contain one or more of the following: IP
 address, management station name, network manager's name, location,
 or phone number.  This information will help users to share the
 resources more effectively.
 There is often default functionality that the device or the
 administrator of the probe (often the network administrator) wishes
 to set up.  The resources associated with this functionality are then
 owned by the device itself or by the network administrator, and are
 intended to be long-lived.  In this case, the device or the
 administrator will set the relevant owner object to a string starting
 with 'monitor'.  Indiscriminate modification of the monitor-owned
 configuration by network management stations is discouraged.  In
 fact, a network management station should only modify these objects
 under the direction of the administrator of the probe.
 Resources on a probe are scarce and are typically allocated when
 control rows are created by an application.  Since many applications
 may be using a probe simultaneously, indiscriminate allocation of
 resources to particular applications is very likely to cause resource
 shortages in the probe.
 When a network management station wishes to utilize a function in a
 monitor, it is encouraged to first scan the control table of that
 function to find an instance with similar parameters to share.  This
 is especially true for those instances owned by the monitor, which
 can be assumed to change infrequently.  If a management station
 decides to share an instance owned by another management station, it
 should understand that the management station that owns the instance
 may indiscriminately modify or delete it.
 It should be noted that a management application should have the most
 trust in a monitor-owned row because it should be changed very
 infrequently.  A row owned by the management application is less
 long-lived because a network administrator is more likely to re-
 assign resources from a row that is in use by one user than from a
 monitor-owned row that is potentially in use by many users.  A row
 owned by another application would be even less long-lived because
 the other application may delete or modify that row completely at its
 discretion.

Waldbusser Standards Track [Page 8] RFC 2021 Remote Network Monitoring MIB January 1997

3.2. Row Addition Among Multiple Management Stations

 The addition of new rows is achieved using the RowStatus method
 described in RFC 1903 [2].  In this MIB, rows are often added to a
 table in order to configure a function.  This configuration usually
 involves parameters that control the operation of the function.  The
 agent must check these parameters to make sure they are appropriate
 given restrictions defined in this MIB as well as any implementation
 specific restrictions such as lack of resources.  The agent
 implementor may be confused as to when to check these parameters and
 when to signal to the management station that the parameters are
 invalid.  There are two opportunities:
  o When the management station sets each parameter object.
  o When the management station sets the row status object
    to active.
 If the latter is chosen, it would be unclear to the management
 station which of the several parameters was invalid and caused the
 badValue error to be emitted.  Thus, wherever possible, the
 implementor should choose the former as it will provide more
 information to the management station.
 A problem can arise when multiple management stations attempt to set
 configuration information simultaneously using SNMP.  When this
 involves the addition of a new conceptual row in the same control
 table, the managers may collide, attempting to create the same entry.
 To guard against these collisions, each such control entry contains a
 status object with special semantics that help to arbitrate among the
 managers.  If an attempt is made with the row addition mechanism to
 create such a status object and that object already exists, an error
 is returned.  When more than one manager simultaneously attempts to
 create the same conceptual row, only the first will succeed.  The
 others will receive an error.
 In the RMON MIB [RFC 1757], the EntryStatus textual convention was
 introduced to provide this mutual exclusion function.  Since then,
 this function was added to the SNMP framework as the RowStatus
 textual convention.  The RowStatus textual convention is used for the
 definition of all new tables.
 When a manager wishes to create a new control entry, it needs to
 choose an index for that row.  It may choose this index in a variety
 of ways, hopefully minimizing the chances that the index is in use by
 another manager.  If the index is in use, the mechanism mentioned
 previously will guard against collisions.  Examples of schemes to
 choose index values include random selection or scanning the control

Waldbusser Standards Track [Page 9] RFC 2021 Remote Network Monitoring MIB January 1997

 table looking for the first unused index.  Because index values may
 be any valid value in the range and they are chosen by the manager,
 the agent must allow a row to be created with any unused index value
 if it has the resources to create a new row.
 Some tables in this MIB reference other tables within this MIB.  When
 creating or deleting entries in these tables, it is generally
 allowable for dangling references to exist.  There is no defined
 order for creating or deleting entries in these tables.

4. Conventions

 The following conventions are used throughout the RMON MIB and its
 companion documents.
 Good Packets
 Good packets are error-free packets that have a valid frame length.
 For example, on Ethernet, good packets are error-free packets that
 are between 64 octets long and 1518 octets long.  They follow the
 form defined in IEEE 802.3 section 3.2.all.
 Bad Packets
 Bad packets are packets that have proper framing and are therefore
 recognized as packets, but contain errors within the packet or have
 an invalid length.  For example, on Ethernet, bad packets have a
 valid preamble and SFD, but have a bad CRC, or are either shorter
 than 64 octets or longer than 1518 octets.

5. RMON 2 Conventions

 The following practices and conventions are introduced in the RMON 2
 MIB.

5.1. Usage of the term Application Level

 There are many cases in this MIB where the term Application Level is
 used to describe a class of protocols or a capability.  This does not
 typically mean a protocol that is an OSI Layer 7 protocol.  Rather,
 it is used to identify a class of protocols that is not limited to
 MAC-layer and network-layer protocols, but can also include
 transport, session, presentation, and application-layer protocols.

Waldbusser Standards Track [Page 10] RFC 2021 Remote Network Monitoring MIB January 1997

5.2. Protocol Directory and Limited Extensibility

 Every RMON 2 implementation will have the capability to parse certain
 types of packets and identify their protocol type at multiple levels,
 The protocol directory presents an inventory of those protocol types
 the probe is capable of monitoring, and allows the addition,
 deletion, and configuration of protocol types in this list.
 One concept deserves special attention: the "limited extensibility"
 of the protocol directory table.  The RMON 2 model is that protocols
 are detected by static software that has been written at
 implementation time.  Therefore, as a matter of configuration, an
 implementation does not have the ability to suddenly learn how to
 parse new packet types.  However, an implementation may be written
 such that the software knows where the demultiplexing field is for a
 particular protocol, and can be written in such a way that the
 decoding of the next layer up is table-driven.  This works when the
 code has been written to accomodate it and can be extended no more
 than one level higher.  This extensibility is called "limited
 extensibility" to highlight these limitations.  However, this can be
 a very useful tool.
 For example, suppose that an implementation has C code that
 understands how to decode IP packets on any of several ethernet
 encapsulations, and also knows how to interpret the IP protocol field
 to recognize UDP packets and how to decode the UDP port number
 fields.  That implementation may be table- driven so that among the
 many different UDP port numbers possible, it is configured to
 recognize 161 as SNMP, port 53 as DNS, and port 69 as TFTP.  The
 limited extensibility of the protocol directory table would allow an
 SNMP operation to create an entry that would create an additional
 table mapping for UDP that would recognize UDP port 123 as NTP and
 begin counting such packets.
 This limited extensibility is an option that an implementation can
 choose to allow or disallow for any protocol that has child
 protocols.

5.3. Errors in packets

 Packets with link-level errors are not counted anywhere in this MIB
 because most variables in this MIB requires the decoding of the
 contents of the packet, which is meaningless if there is a link-level
 error.
 Packets in which protocol errors are detected are counted for all
 protocols below the layer in which the error was encountered.  The
 implication of this is that packets in which errors are detected at

Waldbusser Standards Track [Page 11] RFC 2021 Remote Network Monitoring MIB January 1997

 the network-layer are not counted anywhere in this MIB, while packets
 with errors detected at the transport layer may have network-layer
 statistics counted.

6. Definitions

RMON2-MIB DEFINITIONS ::= BEGIN IMPORTS

  MODULE-IDENTITY, OBJECT-TYPE, Counter32, Integer32,
      Gauge32, IpAddress, TimeTicks            FROM SNMPv2-SMI
  TEXTUAL-CONVENTION, RowStatus, DisplayString, TimeStamp
                                               FROM SNMPv2-TC
  MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF
  mib-2, ifIndex                  FROM RFC1213-MIB
  OwnerString, statistics, history, hosts,
  matrix, filter, etherStatsEntry, historyControlEntry,
  hostControlEntry, matrixControlEntry, filterEntry,
  channelEntry                    FROM RMON-MIB
  tokenRing, tokenRingMLStatsEntry, tokenRingPStatsEntry,
  ringStationControlEntry, sourceRoutingStatsEntry
                                  FROM TOKEN-RING-RMON-MIB;

– Remote Network Monitoring MIB

rmon MODULE-IDENTITY

  LAST-UPDATED "9605270000Z"
  ORGANIZATION "IETF RMON MIB Working Group"
  CONTACT-INFO
      "Steve Waldbusser   (WG Editor)
       Postal: International Network Services
       650 Castro Street, Suite 260
       Mountain View, CA 94041
       Phone:  +1 415 254 4251
       Email:  waldbusser@ins.com
       Andy Bierman   (WG Chair)
       Phone:  +1 805 648 2028
       Email:  abierman@west.net"
  DESCRIPTION
      "The MIB module for managing remote monitoring
       device implementations. This MIB module
       augments the original RMON MIB as specified in
       RFC 1757."
  ::= { mib-2 16 }

– { rmon 1 } through { rmon 10 } are defined in RMON and – the Token Ring RMON MIB [RFC 1513]

Waldbusser Standards Track [Page 12] RFC 2021 Remote Network Monitoring MIB January 1997

  protocolDir     OBJECT IDENTIFIER ::= { rmon 11 }
  protocolDist    OBJECT IDENTIFIER ::= { rmon 12 }
  addressMap      OBJECT IDENTIFIER ::= { rmon 13 }
  nlHost          OBJECT IDENTIFIER ::= { rmon 14 }
  nlMatrix        OBJECT IDENTIFIER ::= { rmon 15 }
  alHost          OBJECT IDENTIFIER ::= { rmon 16 }
  alMatrix        OBJECT IDENTIFIER ::= { rmon 17 }
  usrHistory      OBJECT IDENTIFIER ::= { rmon 18 }
  probeConfig     OBJECT IDENTIFIER ::= { rmon 19 }
  rmonConformance OBJECT IDENTIFIER ::= { rmon 20 }

– Textual Conventions

ZeroBasedCounter32 ::= TEXTUAL-CONVENTION

  STATUS current
  DESCRIPTION
      "This TC describes an object which counts events with the
      following semantics: objects of this type will be set to
      zero(0) on creation and will thereafter count appropriate
      events, wrapping back to zero(0) when the value 2^32 is
      reached.
      Provided that an application discovers the new object within
      the minimum time to wrap it can use the initial value as a
      delta since it last polled the table of which this object is
      part.  It is important for a management station to be aware of
      this minimum time and the actual time between polls, and to
      discard data if the actual time is too long or there is no
      defined minimum time.
      Typically this TC is used in tables where the INDEX space is
      constantly changing and/or the TimeFilter mechanism is in use."
  SYNTAX Gauge32

LastCreateTime ::= TEXTUAL-CONVENTION

  STATUS current
  DESCRIPTION
      "This TC describes an object that stores the last time its
      entry was created.
      This can be used for polling applications to determine that an
      entry has been deleted and re-created between polls, causing
      an otherwise undetectable discontinuity in the data."
  SYNTAX TimeStamp

TimeFilter ::= TEXTUAL-CONVENTION

  STATUS        current
  DESCRIPTION

Waldbusser Standards Track [Page 13] RFC 2021 Remote Network Monitoring MIB January 1997

      "To be used for the index to a table.  Allows an application
      to download only those rows changed since a particular time.
      A row is considered changed if the value of any object in the
      row changes or if the row is created or deleted.
      When sysUpTime is equal to zero, this table shall be empty.
      One entry exists for each past value of sysUpTime, except that
      the whole table is purged should sysUpTime wrap.
      As this basic row is updated new conceptual rows are created
      (which still share the now updated object values with all
      other instances).  The number of instances which are created
      is determined by the value of sysUpTime at which the basic row
      was last updated.  One instance will exist for each value of
      sysUpTime at the last update time for the row.  A new
      timeMark instance is created for each new sysUpTime value.
      Each new conceptual row will be associated with the timeMark
      instance which was created at the value of sysUpTime with
      which the conceptual row is to be associated.
      By definition all conceptual rows were updated at or after
      time zero and so at least one conceptual row (associated with
      timeMark.0) must exist for each underlying (basic) row.
      See the appendix for further discussion of this variable.
      Consider the following fooTable:
      fooTable ...
      INDEX { fooTimeMark, fooIndex }
      FooEntry {
         fooTimeMark  TimeFilter
         fooIndex     INTEGER,
         fooCounts    Counter
      }
      Should there be two basic rows in this table (fooIndex == 1,
      fooIndex == 2) and row 1 was updated most recently at time 6,
      while row 2 was updated most recently at time 8, and both rows
      had been updated on several earlier occasions such that the
      current values were 5 and 9 respectively then the following
      fooCounts instances would exist.
      fooCounts.0.1  5
      fooCounts.0.2  9
      fooCounts.1.1  5

Waldbusser Standards Track [Page 14] RFC 2021 Remote Network Monitoring MIB January 1997

      fooCounts.1.2  9
      fooCounts.2.1  5
      fooCounts.2.2  9
      fooCounts.3.1  5
      fooCounts.3.2  9
      fooCounts.4.1  5
      fooCounts.4.2  9
      fooCounts.5.1  5
      fooCounts.5.2  9
      fooCounts.6.1  5
      fooCounts.6.2  9
      fooCounts.7.2  9    -- note that row 1 doesn't exist for
      fooCounts.8.2  9    -- times 7 and 8"
  SYNTAX    TimeTicks

DataSource ::= TEXTUAL-CONVENTION

  STATUS        current
  DESCRIPTION
      "Identifies the source of the data that the associated
      function is configured to analyze. This source can be any
      interface on this device.
      In order to identify a particular interface, this
      object shall identify the instance of the ifIndex
      object, defined in [3,5], for the desired interface.
      For example, if an entry were to receive data from
      interface #1, this object would be set to ifIndex.1."
  SYNTAX      OBJECT IDENTIFIER

– – Protocol Directory Group – – Lists the inventory of protocols the probe has the capability of – monitoring and allows the addition, deletion, and configuration of – entries in this list.

protocolDirLastChange OBJECT-TYPE

  SYNTAX      TimeStamp
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The value of sysUpTime at the time the protocol directory
      was last modified, either through insertions or deletions,
      or through modifications of either the
      protocolDirAddressMapConfig, protocolDirHostConfig, or
      protocolDirMatrixConfig."
  ::= { protocolDir 1 }

Waldbusser Standards Track [Page 15] RFC 2021 Remote Network Monitoring MIB January 1997

protocolDirTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF ProtocolDirEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "This table lists the protocols that this agent has the
      capability to decode and count.  There is one entry in this
      table for each such protocol.  These protocols represent
      different network layer, transport layer, and higher-layer
      protocols.  The agent should boot up with this table
      preconfigured with those protocols that it knows about and
      wishes to monitor.  Implementations are strongly encouraged to
      support protocols higher than the network layer (at least for
      the protocol distribution group), even for implementations
      that don't support the application layer groups."
  ::= { protocolDir 2 }

protocolDirEntry OBJECT-TYPE

  SYNTAX      ProtocolDirEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the protocolDirTable.
       An example of the indexing of this entry is
       protocolDirLocalIndex.8.0.0.0.1.0.0.8.0.2.0.0, which is the
       encoding of a length of 8, followed by 8 subids encoding the
       protocolDirID of 1.2048, followed by a length of 2 and the
       2 subids encoding zero-valued parameters."
  INDEX { protocolDirID, protocolDirParameters }
  ::= { protocolDirTable  1 }

ProtocolDirEntry ::= SEQUENCE {

  protocolDirID                   OCTET STRING,
  protocolDirParameters           OCTET STRING,
  protocolDirLocalIndex           Integer32,
  protocolDirDescr                DisplayString,
  protocolDirType                 BITS,
  protocolDirAddressMapConfig     INTEGER,
  protocolDirHostConfig           INTEGER,
  protocolDirMatrixConfig         INTEGER,
  protocolDirOwner                OwnerString,
  protocolDirStatus               RowStatus

}

protocolDirID OBJECT-TYPE

  SYNTAX      OCTET STRING
  MAX-ACCESS  not-accessible

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  STATUS      current
  DESCRIPTION
      "A unique identifier for a particular protocol.  Standard
      identifiers will be defined in a manner such that they
      can often be used as specifications for new protocols - i.e.
      a tree-structured assignment mechanism that matches the
      protocol encapsulation `tree' and which has algorithmic
      assignment mechanisms for certain subtrees. See RFC XXX for
      more details.
      Despite the algorithmic mechanism, the probe will only place
      entries in here for those protocols it chooses to collect.  In
      other words, it need not populate this table with all of the
      possible ethernet protocol types, nor need it create them on
      the fly when it sees them.  Whether or not it does these
      things is a matter of product definition (cost/benefit,
      usability), and is up to the designer of the product.
      If an entry is written to this table with a protocolDirID that
      the agent doesn't understand, either directly or
      algorithmically, the SET request will be rejected with an
      inconsistentName or badValue (for SNMPv1) error."
  ::= { protocolDirEntry 1 }

protocolDirParameters OBJECT-TYPE

  SYNTAX      OCTET STRING
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A set of parameters for the associated protocolDirID.
      See the associated RMON2 Protocol Identifiers document
      for a description of the possible parameters. There
      will be one octet in this string for each sub-identifier in
      the protocolDirID, and the parameters will appear here in the
      same order as the associated sub-identifiers appear in the
      protocolDirID.
      Every node in the protocolDirID tree has a different, optional
      set of parameters defined (that is, the definition of
      parameters for a node is optional).  The proper parameter
      value for each node is included in this string.  Note that the
      inclusion of a parameter value in this string for each node is
      not optional - what is optional is that a node may have no
      parameters defined, in which case the parameter field for that
      node will be zero."
  ::= { protocolDirEntry 2 }

protocolDirLocalIndex OBJECT-TYPE

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  SYNTAX      Integer32 (1..2147483647)
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The locally arbitrary, but unique identifier associated
      with this protocolDir entry.
      The value for each supported protocol must remain constant at
      least from one re-initialization of the entity's network
      management system to the next re-initialization, except that
      if a protocol is deleted and re-created, it must be re-created
      with a new value that has not been used since the last
      re-initialization.
      The specific value is meaningful only within a given SNMP
      entity. A protocolDirLocalIndex must not be re-used until the
      next agent-restart in the event the protocol directory entry
      is deleted."
  ::= { protocolDirEntry 3 }

protocolDirDescr OBJECT-TYPE

  SYNTAX      DisplayString (SIZE (1..64))
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "A textual description of the protocol encapsulation.
      A probe may choose to describe only a subset of the
      entire encapsulation (e.g. only the highest layer).
      This object is intended for human consumption only.
      This object may not be modified if the associated
      protocolDirStatus object is equal to active(1)."
  ::= { protocolDirEntry 4 }

protocolDirType OBJECT-TYPE

  SYNTAX      BITS {
                  extensible(0),
                  addressRecognitionCapable(1)
              }
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "This object describes 2 attributes of this protocol
       directory entry.
       The presence or absence of the `extensible' bit describes
       whether or not this protocol directory entry can be extended

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       by the user by creating protocol directory entries which are
       children of this protocol.
       An example of an entry that will often allow extensibility is
       `ip.udp'.  The probe may automatically populate some children
       of this node such as `ip.udp.snmp' and `ip.udp.dns'.
       A probe administrator or user may also populate additional
       children via remote SNMP requests that create entries in this
       table.  When a child node is added for a protocol for which the
       probe has no built in support, extending a parent node (for
       which the probe does have built in support),
       that child node is not extendible.  This is termed `limited
       extensibility'.
       When a child node is added through this extensibility
       mechanism, the values of protocolDirLocalIndex and
       protocolDirType shall be assigned by the agent.
       The other objects in the entry will be assigned by the
       manager who is creating the new entry.
       This object also describes whether or not this agent can
       recognize addresses for this protocol, should it be a network
       level protocol.  That is, while a probe may be able to
       recognize packets of a particular network layer protocol and
       count them, it takes additional logic to be able to recognize
       the addresses in this protocol and to populate network layer
       or application layer tables with the addresses in this
       protocol.  If this bit is set, the agent will recognize
       network layer addresses for this protoocl and populate the
       network and application layer host and matrix tables with
       these protocols.
       Note that when an entry is created, the agent will supply
       values for the bits that match the capabilities of the agent
       with respect to this protocol.  Note that since row creations
       usually exercise the limited extensibility feature, these
       bits will usually be set to zero."
  ::= { protocolDirEntry 5 }

protocolDirAddressMapConfig OBJECT-TYPE

  SYNTAX      INTEGER {
                  notSupported(1),
                  supportedOff(2),
                  supportedOn(3)
              }
  MAX-ACCESS  read-create
  STATUS      current

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  DESCRIPTION
      "This object describes and configures the probe's support for
      address mapping for this protocol.  When the probe creates
      entries in this table for all protocols that it understands,
      it will set the entry to notSupported(1) if it doesn't have
      the capability to perform address mapping for the protocol or
      if this protocol is not a network-layer protocol.  When
      an entry is created in this table by a management operation as
      part of the limited extensibility feature, the probe must set
      this value to notSupported(1), because limited extensibility
      of the protocolDirTable does not extend to interpreting
      addresses of the extended protocols.
      If the value of this object is notSupported(1), the probe
      will not perform address mapping for this protocol and
      shall not allow this object to be changed to any other value.
      If the value of this object is supportedOn(3), the probe
      supports address mapping for this protocol and is configured
      to perform address mapping for this protocol for all
      addressMappingControlEntries and all interfaces.
      If the value of this object is supportedOff(2), the probe
      supports address mapping for this protocol but is configured
      to not perform address mapping for this protocol for any
      addressMappingControlEntries and all interfaces.
      Whenever this value changes from supportedOn(3) to
      supportedOff(2), the probe shall delete all related entries in
      the addressMappingTable."
  ::= { protocolDirEntry 6 }

protocolDirHostConfig OBJECT-TYPE

  SYNTAX      INTEGER {
                  notSupported(1),
                  supportedOff(2),
                  supportedOn(3)
              }
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "This object describes and configures the probe's support for
      the network layer and application layer host tables for this
      protocol.  When the probe creates entries in this table for
      all protocols that it understands, it will set the entry to
      notSupported(1) if it doesn't have the capability to track the
      nlHostTable for this protocol or if the alHostTable is
      implemented but doesn't have the capability to track this
      protocol.  Note that if the alHostTable is implemented, the
      probe may only support a protocol if it is supported in both
      the nlHostTable and the alHostTable.

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      If the associated protocolDirType object has the
      addressRecognitionCapable bit set, then this is a network
      layer protocol for which the probe recognizes addresses, and
      thus the probe will populate the nlHostTable and alHostTable
      with addresses it discovers for this protocol.
      If the value of this object is notSupported(1), the probe
      will not track the nlHostTable or alHostTable for this
      protocol and shall not allow this object to be changed to any
      other value. If the value of this object is supportedOn(3),
      the probe supports tracking of the nlHostTable and alHostTable
      for this protocol and is configured to track both tables
      for this protocol for all control entries and all interfaces.
      If the value of this object is supportedOff(2), the probe
      supports tracking of the nlHostTable and alHostTable for this
      protocol but is configured to not track these tables
      for any control entries or interfaces.
      Whenever this value changes from supportedOn(3) to
      supportedOff(2), the probe shall delete all related entries in
      the nlHostTable and alHostTable.
      Note that since each alHostEntry references 2 protocol
      directory entries, one for the network address and one for the
      type of the highest protocol recognized, that an entry will
      only be created in that table if this value is supportedOn(3)
      for both protocols."
  ::= { protocolDirEntry 7 }

protocolDirMatrixConfig OBJECT-TYPE

  SYNTAX      INTEGER {
                  notSupported(1),
                  supportedOff(2),
                  supportedOn(3)
              }
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "This object describes and configures the probe's support for
      the network layer and application layer matrix tables for this
      protocol.  When the probe creates entries in this table for
      all protocols that it understands, it will set the entry to
      notSupported(1) if it doesn't have the capability to track the
      nlMatrixTables for this protocol or if the alMatrixTables are
      implemented but don't have the capability to track this
      protocol.  Note that if the alMatrix tables are implemented,
      the probe may only support a protocol if it is supported in
      the the both of the nlMatrixTables and both of the
      alMatrixTables.

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      If the associated protocolDirType object has the
      addressRecognitionCapable bit set, then this is a network
      layer protocol for which the probe recognizes addresses, and
      thus the probe will populate both of the nlMatrixTables and
      both of the alMatrixTables with addresses it discovers for
      this protocol.
      If the value of this object is notSupported(1), the probe
      will not track either of the nlMatrixTables or the
      alMatrixTables for this protocol and shall not allow this
      object to be changed to any other value. If the value of this
      object is supportedOn(3), the probe supports tracking of both
      of the nlMatrixTables and (if implemented) both of the
      alMatrixTables for this protocol and is configured to track
      these tables for this protocol for all control entries and all
      interfaces. If the value of this object is supportedOff(2),
      the probe supports tracking of both of the nlMatrixTables and
      (if implemented) both of the alMatrixTables for this protocol
      but is configured to not track these tables for this
      protocol for any control entries or interfaces.
      Whenever this value changes from supportedOn(3) to
      supportedOff(2), the probe shall delete all related entries in
      the nlMatrixTables and the alMatrixTables.
      Note that since each alMatrixEntry references 2 protocol
      directory entries, one for the network address and one for the
      type of the highest protocol recognized, that an entry will
      only be created in that table if this value is supportedOn(3)
      for both protocols."
  ::= { protocolDirEntry 8 }

protocolDirOwner OBJECT-TYPE

  SYNTAX      OwnerString
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The entity that configured this entry and is
      therefore using the resources assigned to it."
  ::= { protocolDirEntry 9 }

protocolDirStatus OBJECT-TYPE

  SYNTAX      RowStatus
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The status of this protocol directory entry.
      An entry may not exist in the active state unless all

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      objects in the entry have an appropriate value.
      If this object is not equal to active(1), all associated
      entries in the nlHostTable, nlMatrixSDTable, nlMatrixDSTable,
      alHostTable, alMatrixSDTable, and alMatrixDSTable shall be
      deleted."
  ::= { protocolDirEntry 10 }

– – Protocol Distribution Group (protocolDist) – – Collects the relative amounts of octets and packets for the – different protocols detected on a network segment. – protocolDistControlTable, – protocolDistStatsTable

protocolDistControlTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF ProtocolDistControlEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "Controls the setup of protocol type distribution statistics
      tables.
      Implementations are encouraged to add an entry per monitored
      interface upon initialization so that a default collection
      of protocol statistics is available.
      Rationale:
      This table controls collection of very basic statistics
      for any or all of the protocols detected on a given interface.
      An NMS can use this table to quickly determine bandwidth
      allocation utilized by different protocols.
      A media-specific statistics collection could also
      be configured (e.g. etherStats, trPStats) to easily obtain
      total frame, octet, and droppedEvents for the same
      interface."
  ::= { protocolDist 1 }

protocolDistControlEntry OBJECT-TYPE

  SYNTAX      ProtocolDistControlEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the protocolDistControlTable.
       An example of the indexing of this entry is

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       protocolDistControlDroppedFrames.7"
  INDEX { protocolDistControlIndex }
  ::= { protocolDistControlTable 1 }

ProtocolDistControlEntry ::= SEQUENCE {

  protocolDistControlIndex                Integer32,
  protocolDistControlDataSource           DataSource,
  protocolDistControlDroppedFrames        Counter32,
  protocolDistControlCreateTime           LastCreateTime,
  protocolDistControlOwner                OwnerString,
  protocolDistControlStatus               RowStatus

}

protocolDistControlIndex OBJECT-TYPE

  SYNTAX      Integer32 (1..65535)
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A unique index for this protocolDistControlEntry."
  ::= { protocolDistControlEntry 1 }

protocolDistControlDataSource OBJECT-TYPE

  SYNTAX      DataSource
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The source of data for the this protocol distribution.
      The statistics in this group reflect all packets
      on the local network segment attached to the
      identified interface.
      This object may not be modified if the associated
      protocolDistControlStatus object is equal to active(1)."
  ::= { protocolDistControlEntry 2 }

protocolDistControlDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for this entry for
      whatever reason.  Most often, this event occurs when the probe
      is out of some resources and decides to shed load from this
      collection.

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      This count does not include packets that were not counted
      because they had MAC-layer errors.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { protocolDistControlEntry 3 }

protocolDistControlCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this control entry was last
      activated. This can be used by the management station to
      ensure that the table has not been deleted and recreated
      between polls."
  ::= { protocolDistControlEntry 4 }

protocolDistControlOwner OBJECT-TYPE

  SYNTAX      OwnerString
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The entity that configured this entry and is
      therefore using the resources assigned to it."
  ::= { protocolDistControlEntry 5 }

protocolDistControlStatus OBJECT-TYPE

  SYNTAX      RowStatus
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The status of this row.
      An entry may not exist in the active state unless all
      objects in the entry have an appropriate value.
      If this object is not equal to active(1), all associated
      entries in the protocolDistStatsTable shall be deleted."
  ::= { protocolDistControlEntry 6 }

– per interface protocol distribution statistics table protocolDistStatsTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF ProtocolDistStatsEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "An entry is made in this table for every protocol in the

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      protocolDirTable which has been seen in at least one packet.
      Counters are updated in this table for every protocol type
      that is encountered when parsing a packet, but no counters are
      updated for packets with MAC-layer errors.
      Note that if a protocolDirEntry is deleted, all associated
      entries in this table are removed."
  ::= { protocolDist 2 }

protocolDistStatsEntry OBJECT-TYPE

  SYNTAX      ProtocolDistStatsEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the protocolDistStatsTable.
      The index is composed of the protocolDistControlIndex of the
      associated protocolDistControlEntry followed by the
      protocolDirLocalIndex of the associated protocol that this
      entry represents.  In other words, the index identifies the
      protocol distribution an entry is a part of as well as the
      particular protocol that it represents.
      An example of the indexing of this entry is
      protocolDistStatsPkts.1.18"
  INDEX { protocolDistControlIndex, protocolDirLocalIndex }
  ::= { protocolDistStatsTable 1 }

ProtocolDistStatsEntry ::= SEQUENCE {

  protocolDistStatsPkts                    ZeroBasedCounter32,
  protocolDistStatsOctets                  ZeroBasedCounter32

}

protocolDistStatsPkts OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of packets without errors received of this
      protocol type.  Note that this is the number of link-layer
      packets, so if a single network-layer packet is fragmented
      into several link-layer frames, this counter is incremented
      several times."
  ::= { protocolDistStatsEntry 1 }

protocolDistStatsOctets OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only

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  STATUS      current
  DESCRIPTION
      "The number of octets in packets received of this protocol
      type since it was added to the protocolDistStatsTable
      (excluding framing bits but including FCS octets), except for
      those octets in packets that contained errors.
      Note this doesn't count just those octets in the particular
      protocol frames, but includes the entire packet that contained
      the protocol."
  ::= { protocolDistStatsEntry 2 }

– – Address Map Group (addressMap) – – Lists MAC address to network address bindings discovered by the – probe and what interface they were last seen on. – addressMapControlTable – addressMapTable

addressMapInserts OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of times an address mapping entry has been
      inserted into the addressMapTable.  If an entry is inserted,
      then deleted, and then inserted, this counter will be
      incremented by 2.
      Note that the table size can be determined by subtracting
      addressMapDeletes from addressMapInserts."
  ::= { addressMap 1 }

addressMapDeletes OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of times an address mapping entry has been
      deleted from the addressMapTable (for any reason).  If
      an entry is deleted, then inserted, and then deleted, this
      counter will be incremented by 2.
      Note that the table size can be determined by subtracting
      addressMapDeletes from addressMapInserts."
  ::= { addressMap 2 }

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addressMapMaxDesiredEntries OBJECT-TYPE

  SYNTAX      Integer32 (-1..2147483647)
  MAX-ACCESS  read-write
  STATUS      current
  DESCRIPTION
      "The maximum number of entries that are desired in the
      addressMapTable. The probe will not create more than
      this number of entries in the table, but may choose to create
      fewer entries in this table for any reason including the lack
      of resources.
      If this object is set to a value less than the current number
      of entries, enough entries are chosen in an
      implementation-dependent manner and deleted so that the number
      of entries in the table equals the value of this object.
      If this value is set to -1, the probe may create any number
      of entries in this table.
      This object may be used to control how resources are allocated
      on the probe for the various RMON functions."
  ::= { addressMap 3 }

addressMapControlTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF AddressMapControlEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A table to control the collection of network layer address to
      physical address to interface mappings.
      Note that this is not like the typical RMON
      controlTable and dataTable in which each entry creates
      its own data table.  Each entry in this table enables the
      discovery of addresses on a new interface and the placement
      of address mappings into the central addressMapTable.
      Implementations are encouraged to add an entry per monitored
      interface upon initialization so that a default collection
      of address mappings is available."
  ::= { addressMap 4 }

addressMapControlEntry OBJECT-TYPE

  SYNTAX      AddressMapControlEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the addressMapControlTable.

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      An example of the indexing of this entry is
      addressMapControlDroppedFrames.1"
  INDEX { addressMapControlIndex }
  ::= { addressMapControlTable 1 }

AddressMapControlEntry ::= SEQUENCE {

  addressMapControlIndex              Integer32,
  addressMapControlDataSource         DataSource,
  addressMapControlDroppedFrames      Counter32,
  addressMapControlOwner              OwnerString,
  addressMapControlStatus             RowStatus

}

addressMapControlIndex OBJECT-TYPE

  SYNTAX      Integer32 (1..65535)
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A unique index for this entry in the addressMapControlTable."
  ::= { addressMapControlEntry 1 }

addressMapControlDataSource OBJECT-TYPE

  SYNTAX      DataSource
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The source of data for this addressMapControlEntry."
  ::= { addressMapControlEntry 2 }

addressMapControlDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for this entry for
      whatever reason.  Most often, this event occurs when the probe
      is out of some resources and decides to shed load from this
      collection.
      This count does not include packets that were not counted
      because they had MAC-layer errors.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { addressMapControlEntry 3 }

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addressMapControlOwner OBJECT-TYPE

  SYNTAX      OwnerString
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The entity that configured this entry and is
      therefore using the resources assigned to it."
  ::= { addressMapControlEntry 4 }

addressMapControlStatus OBJECT-TYPE

  SYNTAX      RowStatus
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The status of this addressMap control entry.
      An entry may not exist in the active state unless all
      objects in the entry have an appropriate value.
      If this object is not equal to active(1), all associated
      entries in the addressMapTable shall be deleted."
  ::= { addressMapControlEntry 5 }

addressMapTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF AddressMapEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A table of network layer address to physical address to
      interface mappings.
      The probe will add entries to this table based on the source
      MAC and network addresses seen in packets without MAC-level
      errors. The probe will populate this table for all protocols
      in the protocol directory table whose value of
      protocolDirAddressMapConfig is equal to supportedOn(3), and
      will delete any entries whose protocolDirEntry is deleted or
      has a protocolDirAddressMapConfig value of supportedOff(2)."
  ::= { addressMap 5 }

addressMapEntry OBJECT-TYPE

  SYNTAX      AddressMapEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the addressMapTable.
      The protocolDirLocalIndex in the index identifies the network
      layer protocol of the addressMapNetworkAddress.

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      An example of the indexing of this entry is
      addressMapSource.783495.18.4.128.2.6.6.11.1.3.6.1.2.1.2.2.1.1.1"
  INDEX { addressMapTimeMark, protocolDirLocalIndex,
          addressMapNetworkAddress, addressMapSource }
  ::= { addressMapTable 1 }

AddressMapEntry ::= SEQUENCE {

  addressMapTimeMark                 TimeFilter,
  addressMapNetworkAddress           OCTET STRING,
  addressMapSource                   OBJECT IDENTIFIER,
  addressMapPhysicalAddress          OCTET STRING,
  addressMapLastChange               TimeStamp

}

addressMapTimeMark OBJECT-TYPE

  SYNTAX      TimeFilter
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A TimeFilter for this entry.  See the TimeFilter textual
      convention to see how this works."
  ::= { addressMapEntry 1 }

addressMapNetworkAddress OBJECT-TYPE

  SYNTAX      OCTET STRING
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "The network address for this relation.
      This is represented as an octet string with
      specific semantics and length as identified
      by the protocolDirLocalIndex component of the
      index.
      For example, if the protocolDirLocalIndex indicates an
      encapsulation of ip, this object is encoded as a length
      octet of 4, followed by the 4 octets of the ip address,
      in network byte order."
  ::= { addressMapEntry 2 }

addressMapSource OBJECT-TYPE

  SYNTAX      OBJECT IDENTIFIER
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "The interface or port on which the associated network
       address was most recently seen.

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      If this address mapping was discovered on an interface, this
      object shall identify the instance of the ifIndex
      object, defined in [3,5], for the desired interface.
      For example, if an entry were to receive data from
      interface #1, this object would be set to ifIndex.1.
      If this address mapping was discovered on a port, this
      object shall identify the instance of the rptrGroupPortIndex
      object, defined in [RFC1516], for the desired port.
      For example, if an entry were to receive data from
      group #1, port #1, this object would be set to
      rptrGroupPortIndex.1.1.
      Note that while the dataSource associated with this entry
      may only point to index objects, this object may at times
      point to repeater port objects. This situation occurs when
      the dataSource points to an interface which is a locally
      attached repeater and the agent has additional information
      about the source port of traffic seen on that repeater."
  ::= { addressMapEntry 3 }

addressMapPhysicalAddress OBJECT-TYPE

  SYNTAX      OCTET STRING
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The last source physical address on which the associated
      network address was seen.  If the protocol of the associated
      network address was encapsulated inside of a network-level or
      higher protocol, this will be the address of the next-lower
      protocol with the addressRecognitionCapable bit enabled and
      will be formatted as specified for that protocol."
  ::= { addressMapEntry 4 }

addressMapLastChange OBJECT-TYPE

  SYNTAX      TimeStamp
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The value of sysUpTime at the time this entry was last
      created or the values of the physical address changed.
      This can be used to help detect duplicate address problems, in
      which case this object will be updated frequently."
  ::= { addressMapEntry 5 }

– – Network Layer Host Group

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– – Counts the amount of traffic sent from and to each network address – discovered by the probe. – Note that while the hlHostControlTable also has objects that – control an optional alHostTable, implementation of the alHostTable is – not required to fully implement this group.

hlHostControlTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF HlHostControlEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A list of higher layer (i.e. non-MAC) host table control entries.
      These entries will enable the collection of the network and
      application level host tables indexed by network addresses.
      Both the network and application level host tables are
      controlled by this table is so that they will both be created
      and deleted at the same time, further increasing the ease with
      which they can be implemented as a single datastore (note that
      if an implementation stores application layer host records in
      memory, it can derive network layer host records from them).
      Entries in the nlHostTable will be created on behalf of each
      entry in this table. Additionally, if this probe implements
      the alHostTable, entries in the alHostTable will be created on
      behalf of each entry in this table.
      Implementations are encouraged to add an entry per monitored
      interface upon initialization so that a default collection
      of host statistics is available."
  ::= { nlHost 1 }

hlHostControlEntry OBJECT-TYPE

  SYNTAX      HlHostControlEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the hlHostControlTable.
      An example of the indexing of this entry is
      hlHostControlNlDroppedFrames.1"
  INDEX { hlHostControlIndex }
  ::= { hlHostControlTable 1 }

HlHostControlEntry ::= SEQUENCE {

  hlHostControlIndex               Integer32,
  hlHostControlDataSource          DataSource,

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  hlHostControlNlDroppedFrames     Counter32,
  hlHostControlNlInserts           Counter32,
  hlHostControlNlDeletes           Counter32,
  hlHostControlNlMaxDesiredEntries Integer32,
  hlHostControlAlDroppedFrames     Counter32,
  hlHostControlAlInserts           Counter32,
  hlHostControlAlDeletes           Counter32,
  hlHostControlAlMaxDesiredEntries Integer32,
  hlHostControlOwner               OwnerString,
  hlHostControlStatus              RowStatus

}

hlHostControlIndex OBJECT-TYPE

  SYNTAX      Integer32 (1..65535)
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "An index that uniquely identifies an entry in the
      hlHostControlTable.  Each such entry defines
      a function that discovers hosts on a particular
      interface and places statistics about them in the
      nlHostTable, and optionally in the alHostTable, on
      behalf of this hlHostControlEntry."
  ::= { hlHostControlEntry 1 }

hlHostControlDataSource OBJECT-TYPE

  SYNTAX      DataSource
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The source of data for the associated host tables.
      The statistics in this group reflect all packets
      on the local network segment attached to the
      identified interface.
      This object may not be modified if the associated
      hlHostControlStatus object is equal to active(1)."
  ::= { hlHostControlEntry 2 }

hlHostControlNlDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for the associated

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      nlHost entries for whatever reason.  Most often, this event
      occurs when the probe is out of some resources and decides to
      shed load from this collection.
      This count does not include packets that were not counted
      because they had MAC-layer errors.
      Note that if the nlHostTable is inactive because no protocols
      are enabled in the protocol directory, this value should be 0.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { hlHostControlEntry 3 }

hlHostControlNlInserts OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of times an nlHost entry has been
      inserted into the nlHost table.  If an entry is inserted, then
      deleted, and then inserted, this counter will be incremented
      by 2.
      To allow for efficient implementation strategies, agents may
      delay updating this object for short periods of time.  For
      example, an implementation strategy may allow internal
      data structures to differ from those visible via SNMP for
      short periods of time.  This counter may reflect the internal
      data structures for those short periods of time.
      Note that the table size can be determined by subtracting
      hlHostControlNlDeletes from hlHostControlNlInserts."
  ::= { hlHostControlEntry 4 }

hlHostControlNlDeletes OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of times an nlHost entry has been
      deleted from the nlHost table (for any reason).  If an entry
      is deleted, then inserted, and then deleted, this counter will
      be incremented by 2.
      To allow for efficient implementation strategies, agents may
      delay updating this object for short periods of time.  For
      example, an implementation strategy may allow internal

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      data structures to differ from those visible via SNMP for
      short periods of time.  This counter may reflect the internal
      data structures for those short periods of time.
      Note that the table size can be determined by subtracting
      hlHostControlNlDeletes from hlHostControlNlInserts."
  ::= { hlHostControlEntry 5 }

hlHostControlNlMaxDesiredEntries OBJECT-TYPE

  SYNTAX      Integer32 (-1..2147483647)
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The maximum number of entries that are desired in the
      nlHostTable on behalf of this control entry. The probe will
      not create more than this number of associated entries in the
      table, but may choose to create fewer entries in this table
      for any reason including the lack of resources.
      If this object is set to a value less than the current number
      of entries, enough entries are chosen in an
      implementation-dependent manner and deleted so that the number
      of entries in the table equals the value of this object.
      If this value is set to -1, the probe may create any number
      of entries in this table.  If the associated
      hlHostControlStatus object is equal to `active', this
      object may not be modified.
      This object may be used to control how resources are allocated
      on the probe for the various RMON functions."
  ::= { hlHostControlEntry 6 }

hlHostControlAlDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for the associated
      alHost entries for whatever reason.  Most often, this event
      occurs when the probe is out of some resources and decides to
      shed load from this collection.
      This count does not include packets that were not counted
      because they had MAC-layer errors.

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      Note that if the alHostTable is not implemented or is inactive
      because no protocols are enabled in the protocol directory,
      this value should be 0.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { hlHostControlEntry 7 }

hlHostControlAlInserts OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of times an alHost entry has been
      inserted into the alHost table.  If an entry is inserted, then
      deleted, and then inserted, this counter will be incremented
      by 2.
      To allow for efficient implementation strategies, agents may
      delay updating this object for short periods of time.  For
      example, an implementation strategy may allow internal
      data structures to differ from those visible via SNMP for
      short periods of time.  This counter may reflect the internal
      data structures for those short periods of time.
      Note that the table size can be determined by subtracting
      hlHostControlAlDeletes from hlHostControlAlInserts."
  ::= { hlHostControlEntry 8 }

hlHostControlAlDeletes OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of times an alHost entry has been
      deleted from the alHost table (for any reason).  If an entry
      is deleted, then inserted, and then deleted, this counter will
      be incremented by 2.
      To allow for efficient implementation strategies, agents may
      delay updating this object for short periods of time.  For
      example, an implementation strategy may allow internal
      data structures to differ from those visible via SNMP for
      short periods of time.  This counter may reflect the internal
      data structures for those short periods of time.
      Note that the table size can be determined by subtracting
      hlHostControlAlDeletes from hlHostControlAlInserts."

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  ::= { hlHostControlEntry 9 }

hlHostControlAlMaxDesiredEntries OBJECT-TYPE

  SYNTAX      Integer32 (-1..2147483647)
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The maximum number of entries that are desired in the alHost
      table on behalf of this control entry. The probe will not
      create more than this number of associated entries in the
      table, but may choose to create fewer entries in this table
      for any reason including the lack of resources.
      If this object is set to a value less than the current number
      of entries, enough entries are chosen in an
      implementation-dependent manner and deleted so that the number
      of entries in the table equals the value of this object.
      If this value is set to -1, the probe may create any number
      of entries in this table.  If the associated
      hlHostControlStatus object is equal to `active', this
      object may not be modified.
      This object may be used to control how resources are allocated
      on the probe for the various RMON functions."
  ::= { hlHostControlEntry 10 }

hlHostControlOwner OBJECT-TYPE

  SYNTAX      OwnerString
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The entity that configured this entry and is
      therefore using the resources assigned to it."
  ::= { hlHostControlEntry 11 }

hlHostControlStatus OBJECT-TYPE

  SYNTAX      RowStatus
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The status of this hlHostControlEntry.
      An entry may not exist in the active state unless all
      objects in the entry have an appropriate value.
      If this object is not equal to active(1), all associated
      entries in the nlHostTable and alHostTable shall be deleted."

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  ::= { hlHostControlEntry 12 }

nlHostTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF NlHostEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A collection of statistics for a particular network layer
      address that has been discovered on an interface of this
      device.
      The probe will populate this table for all network layer
      protocols in the protocol directory table whose value of
      protocolDirHostConfig is equal to supportedOn(3), and
      will delete any entries whose protocolDirEntry is deleted or
      has a protocolDirHostConfig value of supportedOff(2).
      The probe will add to this table all addresses seen
      as the source or destination address in all packets with no
      MAC errors, and will increment octet and packet counts in the
      table for all packets with no MAC errors."

::= { nlHost 2 }

nlHostEntry OBJECT-TYPE

  SYNTAX      NlHostEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the nlHostTable.
      The hlHostControlIndex value in the index identifies the
      hlHostControlEntry on whose behalf this entry was created.
      The protocolDirLocalIndex value in the index identifies the
      network layer protocol of the nlHostAddress.
      An example of the indexing of this entry is
      nlHostOutPkts.1.783495.18.4.128.2.6.6."
  INDEX { hlHostControlIndex, nlHostTimeMark,
          protocolDirLocalIndex, nlHostAddress }
  ::= { nlHostTable 1 }

NlHostEntry ::= SEQUENCE {

  nlHostTimeMark              TimeFilter,
  nlHostAddress               OCTET STRING,
  nlHostInPkts                ZeroBasedCounter32,
  nlHostOutPkts               ZeroBasedCounter32,
  nlHostInOctets              ZeroBasedCounter32,
  nlHostOutOctets             ZeroBasedCounter32,

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  nlHostOutMacNonUnicastPkts  ZeroBasedCounter32,
  nlHostCreateTime            LastCreateTime

}

nlHostTimeMark OBJECT-TYPE

  SYNTAX      TimeFilter
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A TimeFilter for this entry.  See the TimeFilter textual
      convention to see how this works."
  ::= { nlHostEntry 1 }

nlHostAddress OBJECT-TYPE

  SYNTAX      OCTET STRING
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "The network address for this nlHostEntry.
      This is represented as an octet string with
      specific semantics and length as identified
      by the protocolDirLocalIndex component of the index.
      For example, if the protocolDirLocalIndex indicates an
      encapsulation of ip, this object is encoded as a length
      octet of 4, followed by the 4 octets of the ip address,
      in network byte order."
  ::= { nlHostEntry 2 }

nlHostInPkts OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of packets without errors transmitted to
      this address since it was added to the nlHostTable.  Note that
      this is the number of link-layer packets, so if a single
      network-layer packet is fragmented into several link-layer
      frames, this counter is incremented several times."
  ::= { nlHostEntry 3 }

nlHostOutPkts OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of packets without errors transmitted by

Waldbusser Standards Track [Page 40] RFC 2021 Remote Network Monitoring MIB January 1997

      this address since it was added to the nlHostTable.  Note that
      this is the number of link-layer packets, so if a single
      network-layer packet is fragmented into several link-layer
      frames, this counter is incremented several times."
  ::= { nlHostEntry 4 }

nlHostInOctets OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of octets transmitted to this address
      since it was added to the nlHostTable (excluding
      framing bits but including FCS octets), excluding
      those octets in packets that contained errors.
      Note this doesn't count just those octets in the particular
      protocol frames, but includes the entire packet that contained
      the protocol."
  ::= { nlHostEntry 5 }

nlHostOutOctets OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of octets transmitted by this address
      since it was added to the nlHostTable (excluding
      framing bits but including FCS octets), excluding
      those octets in packets that contained errors.
      Note this doesn't count just those octets in the particular
      protocol frames, but includes the entire packet that contained
      the protocol."
  ::= { nlHostEntry 6 }

nlHostOutMacNonUnicastPkts OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of packets without errors transmitted by this
      address that were directed to any MAC broadcast addresses
      or to any MAC multicast addresses since this host was
      added to the nlHostTable. Note that this is the number of
      link-layer packets, so if a single network-layer packet is
      fragmented into several link-layer frames, this counter is
      incremented several times."

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  ::= { nlHostEntry 7 }

nlHostCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this entry was last activated.
      This can be used by the management station to ensure that the
      entry has not been deleted and recreated between polls."
  ::= { nlHostEntry 8 }

– – Network Layer Matrix Group – – Counts the amount of traffic sent between each pair of network – addresses discovered by the probe. – Note that while the hlMatrixControlTable also has objects that – control optional alMatrixTables, implementation of the – alMatrixTables is not required to fully implement this group.

hlMatrixControlTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF HlMatrixControlEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A list of higher layer (i.e. non-MAC) matrix control entries.
      These entries will enable the collection of the network and
      application level matrix tables containing conversation
      statistics indexed by pairs of network addresses.
      Both the network and application level matrix tables are
      controlled by this table is so that they will both be created
      and deleted at the same time, further increasing the ease with
      which they can be implemented as a single datastore (note that
      if an implementation stores application layer matrix records
      in memory, it can derive network layer matrix records from
      them).
      Entries in the nlMatrixSDTable and nlMatrixDSTable will be
      created on behalf of each entry in this table.  Additionally,
      if this probe implements the alMatrix tables, entries in the
      alMatrix tables will be created on behalf of each entry in
      this table."
  ::= { nlMatrix 1 }

hlMatrixControlEntry OBJECT-TYPE

  SYNTAX      HlMatrixControlEntry

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  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the hlMatrixControlTable.
      An example of indexing of this entry is
      hlMatrixControlNlDroppedFrames.1"
  INDEX { hlMatrixControlIndex }
  ::= { hlMatrixControlTable 1 }

HlMatrixControlEntry ::= SEQUENCE {

  hlMatrixControlIndex                  Integer32,
  hlMatrixControlDataSource             DataSource,
  hlMatrixControlNlDroppedFrames        Counter32,
  hlMatrixControlNlInserts              Counter32,
  hlMatrixControlNlDeletes              Counter32,
  hlMatrixControlNlMaxDesiredEntries    Integer32,
  hlMatrixControlAlDroppedFrames        Counter32,
  hlMatrixControlAlInserts              Counter32,
  hlMatrixControlAlDeletes              Counter32,
  hlMatrixControlAlMaxDesiredEntries    Integer32,
  hlMatrixControlOwner                  OwnerString,
  hlMatrixControlStatus                 RowStatus

}

hlMatrixControlIndex OBJECT-TYPE

  SYNTAX      Integer32 (1..65535)
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "An index that uniquely identifies an entry in the
      hlMatrixControlTable.  Each such entry defines
      a function that discovers conversations on a particular
      interface and places statistics about them in the
      nlMatrixSDTable and the nlMatrixDSTable, and optionally the
      alMatrixSDTable and alMatrixDSTable, on behalf of this
      hlMatrixControlEntry."
  ::= { hlMatrixControlEntry 1 }

hlMatrixControlDataSource OBJECT-TYPE

  SYNTAX      DataSource
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The source of the data for the associated matrix tables.
      The statistics in this group reflect all packets
      on the local network segment attached to the

Waldbusser Standards Track [Page 43] RFC 2021 Remote Network Monitoring MIB January 1997

      identified interface.
      This object may not be modified if the associated
      hlMatrixControlStatus object is equal to active(1)."
  ::= { hlMatrixControlEntry 2 }

hlMatrixControlNlDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for this entry for
      whatever reason.  Most often, this event occurs when the probe
      is out of some resources and decides to shed load from this
      collection.
      This count does not include packets that were not counted
      because they had MAC-layer errors.
      Note that if the nlMatrixTables are inactive because no
      protocols are enabled in the protocol directory, this value
      should be 0.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { hlMatrixControlEntry 3 }

hlMatrixControlNlInserts OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of times an nlMatrix entry has been
      inserted into the nlMatrix tables.  If an entry is inserted,
      then deleted, and then inserted, this counter will be
      incremented by 2.  The addition of a conversation into both
      the nlMatrixSDTable and nlMatrixDSTable shall be counted as
      two insertions (even though every addition into one table must
      be accompanied by an insertion into the other).
      To allow for efficient implementation strategies, agents may
      delay updating this object for short periods of time.  For
      example, an implementation strategy may allow internal
      data structures to differ from those visible via SNMP for
      short periods of time.  This counter may reflect the internal
      data structures for those short periods of time.

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      Note that the sum of then nlMatrixSDTable and nlMatrixDSTable
      sizes can be determined by subtracting
      hlMatrixControlNlDeletes from hlMatrixControlNlInserts."
  ::= { hlMatrixControlEntry 4 }

hlMatrixControlNlDeletes OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of times an nlMatrix entry has been
      deleted from the nlMatrix tables (for any reason).  If an
      entry is deleted, then inserted, and then deleted, this
      counter will be incremented by 2.  The deletion of a
      conversation from both the nlMatrixSDTable and nlMatrixDSTable
      shall be counted as two deletions (even though every deletion
      from one table must be accompanied by a deletion from the
      other).
      To allow for efficient implementation strategies, agents may
      delay updating this object for short periods of time.  For
      example, an implementation strategy may allow internal
      data structures to differ from those visible via SNMP for
      short periods of time.  This counter may reflect the internal
      data structures for those short periods of time.
      Note that the table size can be determined by subtracting
      hlMatrixControlNlDeletes from hlMatrixControlNlInserts."
  ::= { hlMatrixControlEntry 5 }

hlMatrixControlNlMaxDesiredEntries OBJECT-TYPE

  SYNTAX      Integer32 (-1..2147483647)
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The maximum number of entries that are desired in the
      nlMatrix tables on behalf of this control entry. The probe
      will not create more than this number of associated entries in
      the table, but may choose to create fewer entries in this
      table for any reason including the lack of resources.
      If this object is set to a value less than the current number
      of entries, enough entries are chosen in an
      implementation-dependent manner and deleted so that the number
      of entries in the table equals the value of this object.
      If this value is set to -1, the probe may create any number
      of entries in this table.  If the associated

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      hlMatrixControlStatus object is equal to `active', this
      object may not be modified.
      This object may be used to control how resources are allocated
      on the probe for the various RMON functions."
  ::= { hlMatrixControlEntry 6 }

hlMatrixControlAlDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for this entry for
      whatever reason.  Most often, this event occurs when the probe
      is out of some resources and decides to shed load from this
      collection.
      This count does not include packets that were not counted
      because they had MAC-layer errors.
      Note that if the alMatrixTables are not implemented or are
      inactive because no protocols are enabled in the protocol
      directory, this value should be 0.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { hlMatrixControlEntry 7 }

hlMatrixControlAlInserts OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of times an alMatrix entry has been
      inserted into the alMatrix tables.  If an entry is inserted,
      then deleted, and then inserted, this counter will be
      incremented by 2.  The addition of a conversation into both
      the alMatrixSDTable and alMatrixDSTable shall be counted as
      two insertions (even though every addition into one table must
      be accompanied by an insertion into the other).
      To allow for efficient implementation strategies, agents may
      delay updating this object for short periods of time.  For
      example, an implementation strategy may allow internal
      data structures to differ from those visible via SNMP for
      short periods of time.  This counter may reflect the internal

Waldbusser Standards Track [Page 46] RFC 2021 Remote Network Monitoring MIB January 1997

      data structures for those short periods of time.
      Note that the table size can be determined by subtracting
      hlMatrixControlAlDeletes from hlMatrixControlAlInserts."
  ::= { hlMatrixControlEntry 8 }

hlMatrixControlAlDeletes OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of times an alMatrix entry has been
      deleted from the alMatrix tables.  If an entry is deleted,
      then inserted, and then deleted, this counter will be
      incremented by 2.  The deletion of a conversation from both
      the alMatrixSDTable and alMatrixDSTable shall be counted as
      two deletions (even though every deletion from one table must
      be accompanied by a deletion from the other).
      To allow for efficient implementation strategies, agents may
      delay updating this object for short periods of time.  For
      example, an implementation strategy may allow internal
      data structures to differ from those visible via SNMP for
      short periods of time.  This counter may reflect the internal
      data structures for those short periods of time.
      Note that the table size can be determined by subtracting
      hlMatrixControlAlDeletes from hlMatrixControlAlInserts."
  ::= { hlMatrixControlEntry 9 }

hlMatrixControlAlMaxDesiredEntries OBJECT-TYPE

  SYNTAX      Integer32 (-1..2147483647)
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The maximum number of entries that are desired in the
      alMatrix tables on behalf of this control entry. The probe
      will not create more than this number of associated entries in
      the table, but may choose to create fewer entries in this
      table for any reason including the lack of resources.
      If this object is set to a value less than the current number
      of entries, enough entries are chosen in an
      implementation-dependent manner and deleted so that the number
      of entries in the table equals the value of this object.
      If this value is set to -1, the probe may create any number
      of entries in this table.  If the associated

Waldbusser Standards Track [Page 47] RFC 2021 Remote Network Monitoring MIB January 1997

      hlMatrixControlStatus object is equal to `active', this
      object may not be modified.
      This object may be used to control how resources are allocated
      on the probe for the various RMON functions."
  ::= { hlMatrixControlEntry 10 }

hlMatrixControlOwner OBJECT-TYPE

  SYNTAX      OwnerString
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The entity that configured this entry and is
      therefore using the resources assigned to it."
  ::= { hlMatrixControlEntry 11 }

hlMatrixControlStatus OBJECT-TYPE

  SYNTAX      RowStatus
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
      "The status of this hlMatrixControlEntry.
      An entry may not exist in the active state unless all
      objects in the entry have an appropriate value.
      If this object is not equal to active(1), all
      associated entries in the nlMatrixSDTable,
      nlMatrixDSTable, alMatrixSDTable, and the alMatrixDSTable
      shall be deleted by the agent."
  ::= { hlMatrixControlEntry 12 }

nlMatrixSDTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF NlMatrixSDEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A list of traffic matrix entries which collect statistics for
      conversations between two network-level addresses.  This table
      is indexed first by the source address and then by the
      destination address to make it convenient to collect all
      conversations from a particular address.
      The probe will populate this table for all network layer
      protocols in the protocol directory table whose value of
      protocolDirMatrixConfig is equal to supportedOn(3), and
      will delete any entries whose protocolDirEntry is deleted or
      has a protocolDirMatrixConfig value of supportedOff(2).

Waldbusser Standards Track [Page 48] RFC 2021 Remote Network Monitoring MIB January 1997

      The probe will add to this table all pairs of addresses
      seen in all packets with no MAC errors, and will increment
      octet and packet counts in the table for all packets with no
      MAC errors.
      Further, this table will only contain entries that have a
      corresponding entry in the nlMatrixDSTable with the same
      source address and destination address."
  ::= { nlMatrix 2 }

nlMatrixSDEntry OBJECT-TYPE

  SYNTAX      NlMatrixSDEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the nlMatrixSDTable.
      The hlMatrixControlIndex value in the index identifies the
      hlMatrixControlEntry on whose behalf this entry was created.
      The protocolDirLocalIndex value in the index identifies the
      network layer protocol of the nlMatrixSDSourceAddress and
      nlMatrixSDDestAddress.
      An example of the indexing of this table is
      nlMatrixSDPkts.1.783495.18.4.128.2.6.6.4.128.2.6.7"
  INDEX { hlMatrixControlIndex, nlMatrixSDTimeMark,
          protocolDirLocalIndex,
          nlMatrixSDSourceAddress, nlMatrixSDDestAddress }
  ::= { nlMatrixSDTable 1 }

NlMatrixSDEntry ::= SEQUENCE {

  nlMatrixSDTimeMark              TimeFilter,
  nlMatrixSDSourceAddress         OCTET STRING,
  nlMatrixSDDestAddress           OCTET STRING,
  nlMatrixSDPkts                  ZeroBasedCounter32,
  nlMatrixSDOctets                ZeroBasedCounter32,
  nlMatrixSDCreateTime            LastCreateTime

}

nlMatrixSDTimeMark OBJECT-TYPE

  SYNTAX      TimeFilter
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A TimeFilter for this entry.  See the TimeFilter textual
      convention to see how this works."
  ::= { nlMatrixSDEntry 1 }

Waldbusser Standards Track [Page 49] RFC 2021 Remote Network Monitoring MIB January 1997

nlMatrixSDSourceAddress OBJECT-TYPE

  SYNTAX      OCTET STRING
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "The network source address for this nlMatrixSDEntry.
      This is represented as an octet string with
      specific semantics and length as identified
      by the protocolDirLocalIndex component of the index.
      For example, if the protocolDirLocalIndex indicates an
      encapsulation of ip, this object is encoded as a length
      octet of 4, followed by the 4 octets of the ip address,
      in network byte order."
  ::= { nlMatrixSDEntry 2 }

nlMatrixSDDestAddress OBJECT-TYPE

  SYNTAX      OCTET STRING
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "The network destination address for this
      nlMatrixSDEntry.
      This is represented as an octet string with
      specific semantics and length as identified
      by the protocolDirLocalIndex component of the index.
      For example, if the protocolDirLocalIndex indicates an
      encapsulation of ip, this object is encoded as a length
      octet of 4, followed by the 4 octets of the ip address,
      in network byte order."
  ::= { nlMatrixSDEntry 3 }

nlMatrixSDPkts OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of packets without errors transmitted from the
      source address to the destination address since this entry was
      added to the nlMatrixSDTable.  Note that this is the number of
      link-layer packets, so if a single network-layer packet is
      fragmented into several link-layer frames, this counter is
      incremented several times."
  ::= { nlMatrixSDEntry 4 }

Waldbusser Standards Track [Page 50] RFC 2021 Remote Network Monitoring MIB January 1997

nlMatrixSDOctets OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of octets transmitted from the source address to
      the destination address since this entry was added to the
      nlMatrixSDTable (excluding framing bits but
      including FCS octets), excluding those octets in packets that
      contained errors.
      Note this doesn't count just those octets in the particular
      protocol frames, but includes the entire packet that contained
      the protocol."
  ::= { nlMatrixSDEntry 5 }

nlMatrixSDCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this entry was last activated.
      This can be used by the management station to ensure that the
      entry has not been deleted and recreated between polls."
  ::= { nlMatrixSDEntry 6 }

– Traffic matrix tables from destination to source

nlMatrixDSTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF NlMatrixDSEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A list of traffic matrix entries which collect statistics for
      conversations between two network-level addresses.  This table
      is indexed first by the destination address and then by the
      source address to make it convenient to collect all
      conversations to a particular address.
      The probe will populate this table for all network layer
      protocols in the protocol directory table whose value of
      protocolDirMatrixConfig is equal to supportedOn(3), and
      will delete any entries whose protocolDirEntry is deleted or
      has a protocolDirMatrixConfig value of supportedOff(2).
      The probe will add to this table all pairs of addresses
      seen in all packets with no MAC errors, and will increment

Waldbusser Standards Track [Page 51] RFC 2021 Remote Network Monitoring MIB January 1997

      octet and packet counts in the table for all packets with no
      MAC errors.
      Further, this table will only contain entries that have a
      corresponding entry in the nlMatrixSDTable with the same
      source address and destination address."
  ::= { nlMatrix 3 }

nlMatrixDSEntry OBJECT-TYPE

  SYNTAX      NlMatrixDSEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the nlMatrixDSTable.
      The hlMatrixControlIndex value in the index identifies the
      hlMatrixControlEntry on whose behalf this entry was created.
      The protocolDirLocalIndex value in the index identifies the
      network layer protocol of the nlMatrixDSSourceAddress and
      nlMatrixDSDestAddress.
      An example of the indexing of this table is
      nlMatrixDSPkts.1.783495.18.4.128.2.6.7.4.128.2.6.6"
  INDEX { hlMatrixControlIndex, nlMatrixDSTimeMark,
          protocolDirLocalIndex,
          nlMatrixDSDestAddress, nlMatrixDSSourceAddress }
  ::= { nlMatrixDSTable 1 }

NlMatrixDSEntry ::= SEQUENCE {

  nlMatrixDSTimeMark                 TimeFilter,
  nlMatrixDSSourceAddress            OCTET STRING,
  nlMatrixDSDestAddress              OCTET STRING,
  nlMatrixDSPkts                     ZeroBasedCounter32,
  nlMatrixDSOctets                   ZeroBasedCounter32,
  nlMatrixDSCreateTime               LastCreateTime

}

nlMatrixDSTimeMark OBJECT-TYPE

  SYNTAX      TimeFilter
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A TimeFilter for this entry.  See the TimeFilter textual
      convention to see how this works."
  ::= { nlMatrixDSEntry 1 }

nlMatrixDSSourceAddress OBJECT-TYPE

  SYNTAX      OCTET STRING

Waldbusser Standards Track [Page 52] RFC 2021 Remote Network Monitoring MIB January 1997

  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "The network source address for this nlMatrixDSEntry.
      This is represented as an octet string with
      specific semantics and length as identified
      by the protocolDirLocalIndex component of the index.
      For example, if the protocolDirLocalIndex indicates an
      encapsulation of ip, this object is encoded as a length
      octet of 4, followed by the 4 octets of the ip address,
      in network byte order."
  ::= { nlMatrixDSEntry 2 }

nlMatrixDSDestAddress OBJECT-TYPE

  SYNTAX      OCTET STRING
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "The network destination address for this
      nlMatrixDSEntry.
      This is represented as an octet string with
      specific semantics and length as identified
      by the protocolDirLocalIndex component of the index.
      For example, if the protocolDirLocalIndex indicates an
      encapsulation of ip, this object is encoded as a length
      octet of 4, followed by the 4 octets of the ip address,
      in network byte order."
  ::= { nlMatrixDSEntry 3 }

nlMatrixDSPkts OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of packets without errors transmitted from the
      source address to the destination address since this entry was
      added to the nlMatrixDSTable.  Note that this is the number of
      link-layer packets, so if a single network-layer packet is
      fragmented into several link-layer frames, this counter is
      incremented several times."
  ::= { nlMatrixDSEntry 4 }

nlMatrixDSOctets OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32

Waldbusser Standards Track [Page 53] RFC 2021 Remote Network Monitoring MIB January 1997

  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of octets transmitted from the source address
      to the destination address since this entry was added to the
      nlMatrixDSTable (excluding framing bits but
      including FCS octets), excluding those octets in packets that
      contained errors.
      Note this doesn't count just those octets in the particular
      protocol frames, but includes the entire packet that contained
      the protocol."
  ::= { nlMatrixDSEntry 5 }

nlMatrixDSCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this entry was last activated.
      This can be used by the management station to ensure that the
      entry has not been deleted and recreated between polls."
  ::= { nlMatrixDSEntry 6 }

nlMatrixTopNControlTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF NlMatrixTopNControlEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A set of parameters that control the creation of a
      report of the top N matrix entries according to
      a selected metric."
  ::= { nlMatrix 4 }

nlMatrixTopNControlEntry OBJECT-TYPE

  SYNTAX      NlMatrixTopNControlEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the nlMatrixTopNControlTable.
      An example of the indexing of this table is
      nlMatrixTopNControlDuration.3"
  INDEX { nlMatrixTopNControlIndex }
  ::= { nlMatrixTopNControlTable 1 }

NlMatrixTopNControlEntry ::= SEQUENCE {

  nlMatrixTopNControlIndex            Integer32,

Waldbusser Standards Track [Page 54] RFC 2021 Remote Network Monitoring MIB January 1997

  nlMatrixTopNControlMatrixIndex      Integer32,
  nlMatrixTopNControlRateBase         INTEGER,
  nlMatrixTopNControlTimeRemaining    Integer32,
  nlMatrixTopNControlGeneratedReports Counter32,
  nlMatrixTopNControlDuration         Integer32,
  nlMatrixTopNControlRequestedSize    Integer32,
  nlMatrixTopNControlGrantedSize      Integer32,
  nlMatrixTopNControlStartTime        TimeStamp,
  nlMatrixTopNControlOwner            OwnerString,
  nlMatrixTopNControlStatus           RowStatus

}

nlMatrixTopNControlIndex OBJECT-TYPE

  SYNTAX     Integer32 (1..65535)
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "An index that uniquely identifies an entry
      in the nlMatrixTopNControlTable.  Each such
      entry defines one top N report prepared for
      one interface."
  ::= { nlMatrixTopNControlEntry 1 }

nlMatrixTopNControlMatrixIndex OBJECT-TYPE

  SYNTAX     Integer32 (1..65535)
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The nlMatrix[SD/DS] table for which a top N report will be
      prepared on behalf of this entry.  The nlMatrix[SD/DS] table
      is identified by the value of the hlMatrixControlIndex
      for that table - that value is used here to identify the
      particular table.
      This object may not be modified if the associated
      nlMatrixTopNControlStatus object is equal to active(1)."
  ::= { nlMatrixTopNControlEntry 2 }

nlMatrixTopNControlRateBase OBJECT-TYPE

  SYNTAX      INTEGER {
                  nlMatrixTopNPkts(1),
                  nlMatrixTopNOctets(2)
              }
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The variable for each nlMatrix[SD/DS] entry that the
      nlMatrixTopNEntries are sorted by.

Waldbusser Standards Track [Page 55] RFC 2021 Remote Network Monitoring MIB January 1997

      This object may not be modified if the associated
      nlMatrixTopNControlStatus object is equal to active(1)."
  ::= { nlMatrixTopNControlEntry 3 }

nlMatrixTopNControlTimeRemaining OBJECT-TYPE

  SYNTAX     Integer32 (0..2147483647)
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The number of seconds left in the report currently
      being collected.  When this object is modified by
      the management station, a new collection is started,
      possibly aborting a currently running report.  The
      new value is used as the requested duration of this
      report, and is immediately loaded into the associated
      nlMatrixTopNControlDuration object.
      When the report finishes, the probe will automatically
      start another collection with the same initial value
      of nlMatrixTopNControlTimeRemaining.  Thus the management
      station may simply read the resulting reports repeatedly,
      checking the startTime and duration each time to ensure that a
      report was not missed or that the report parameters were not
      changed.
      While the value of this object is non-zero, it decrements
      by one per second until it reaches zero.  At the time
      that this object decrements to zero, the report is made
      accessible in the nlMatrixTopNTable, overwriting any report
      that may be there.
      When this object is modified by the management station, any
      associated entries in the nlMatrixTopNTable shall be deleted.
      (Note that this is a different algorithm than the one used in
      the hostTopNTable)."
  DEFVAL { 1800 }
  ::= { nlMatrixTopNControlEntry 4 }

nlMatrixTopNControlGeneratedReports OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of reports that have been generated by this entry."
  ::= { nlMatrixTopNControlEntry 5 }

nlMatrixTopNControlDuration OBJECT-TYPE

  SYNTAX     Integer32

Waldbusser Standards Track [Page 56] RFC 2021 Remote Network Monitoring MIB January 1997

  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of seconds that this report has collected
      during the last sampling interval.
      When the associated nlMatrixTopNControlTimeRemaining object is
      set, this object shall be set by the probe to the
      same value and shall not be modified until the next
      time the nlMatrixTopNControlTimeRemaining is set.
      This value shall be zero if no reports have been
      requested for this nlMatrixTopNControlEntry."
  ::= { nlMatrixTopNControlEntry 6 }

nlMatrixTopNControlRequestedSize OBJECT-TYPE

  SYNTAX     Integer32 (0..2147483647)
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The maximum number of matrix entries requested for this report.
      When this object is created or modified, the probe
      should set nlMatrixTopNControlGrantedSize as closely to this
      object as is possible for the particular probe
      implementation and available resources."
  DEFVAL { 150 }
  ::= { nlMatrixTopNControlEntry 7 }

nlMatrixTopNControlGrantedSize OBJECT-TYPE

  SYNTAX     Integer32 (0..2147483647)
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The maximum number of matrix entries in this report.
      When the associated nlMatrixTopNControlRequestedSize object is
      created or modified, the probe should set this
      object as closely to the requested value as is
      possible for the particular implementation and
      available resources. The probe must not lower this
      value except as a result of a set to the associated
      nlMatrixTopNControlRequestedSize object.
      If the value of nlMatrixTopNControlRateBase is equal to
      nlMatrixTopNPkts, when the next topN report is generated,
      matrix entries with the highest value of nlMatrixTopNPktRate
      shall be placed in this table in decreasing order of this rate
      until there is no more room or until there are no more

Waldbusser Standards Track [Page 57] RFC 2021 Remote Network Monitoring MIB January 1997

      matrix entries.
      If the value of nlMatrixTopNControlRateBase is equal to
      nlMatrixTopNOctets, when the next topN report is generated,
      matrix entries with the highest value of nlMatrixTopNOctetRate
      shall be placed in this table in decreasing order of this rate
      until there is no more room or until there are no more
      matrix entries.
      It is an implementation-specific matter how entries with the
      same value of nlMatrixTopNPktRate or nlMatrixTopNOctetRate are
      sorted.  It is also an implementation-specific matter as to
      whether or not zero-valued entries are available."
  ::= { nlMatrixTopNControlEntry 8 }

nlMatrixTopNControlStartTime OBJECT-TYPE

  SYNTAX     TimeStamp
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this top N report was
      last started.  In other words, this is the time that
      the associated nlMatrixTopNControlTimeRemaining object was
      modified to start the requested report or the time
      the report was last automatically (re)started.
      This object may be used by the management station to
      determine if a report was missed or not."
  ::= { nlMatrixTopNControlEntry 9 }

nlMatrixTopNControlOwner OBJECT-TYPE

  SYNTAX     OwnerString
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The entity that configured this entry and is
      therefore using the resources assigned to it."
  ::= { nlMatrixTopNControlEntry 10 }

nlMatrixTopNControlStatus OBJECT-TYPE

  SYNTAX     RowStatus
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The status of this nlMatrixTopNControlEntry.
      An entry may not exist in the active state unless all
      objects in the entry have an appropriate value.

Waldbusser Standards Track [Page 58] RFC 2021 Remote Network Monitoring MIB January 1997

      If this object is not equal to active(1), all
      associated entries in the nlMatrixTopNTable shall be deleted
      by the agent."
  ::= { nlMatrixTopNControlEntry 11 }

nlMatrixTopNTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF NlMatrixTopNEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "A set of statistics for those network layer matrix entries
      that have counted the highest number of octets or packets."
  ::= { nlMatrix 5 }

nlMatrixTopNEntry OBJECT-TYPE

  SYNTAX     NlMatrixTopNEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "A conceptual row in the nlMatrixTopNTable.
      The nlMatrixTopNControlIndex value in the index identifies the
      nlMatrixTopNControlEntry on whose behalf this entry was
      created.
      An example of the indexing of this table is
      nlMatrixTopNPktRate.3.10"
  INDEX { nlMatrixTopNControlIndex, nlMatrixTopNIndex }
  ::= { nlMatrixTopNTable 1 }

NlMatrixTopNEntry ::= SEQUENCE {

  nlMatrixTopNIndex                 Integer32,
  nlMatrixTopNProtocolDirLocalIndex Integer32,
  nlMatrixTopNSourceAddress         OCTET STRING,
  nlMatrixTopNDestAddress           OCTET STRING,
  nlMatrixTopNPktRate               Gauge32,
  nlMatrixTopNReversePktRate        Gauge32,
  nlMatrixTopNOctetRate             Gauge32,
  nlMatrixTopNReverseOctetRate      Gauge32

}

nlMatrixTopNIndex OBJECT-TYPE

  SYNTAX     Integer32 (1..65535)
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "An index that uniquely identifies an entry in
      the nlMatrixTopNTable among those in the same report.

Waldbusser Standards Track [Page 59] RFC 2021 Remote Network Monitoring MIB January 1997

      This index is between 1 and N, where N is the
      number of entries in this report.
      If the value of nlMatrixTopNControlRateBase is equal to
      nlMatrixTopNPkts, increasing values of nlMatrixTopNIndex shall
      be assigned to entries with decreasing values of
      nlMatrixTopNPktRate until index N is assigned or there are no
      more nlMatrixTopNEntries.
      If the value of nlMatrixTopNControlRateBase is equal to
      nlMatrixTopNOctets, increasing values of nlMatrixTopNIndex
      shall be assigned to entries with decreasing values of
      nlMatrixTopNOctetRate until index N is assigned or there are
      no more nlMatrixTopNEntries."
  ::= { nlMatrixTopNEntry 1 }

nlMatrixTopNProtocolDirLocalIndex OBJECT-TYPE

  SYNTAX     Integer32 (1..2147483647)
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The protocolDirLocalIndex of the network layer protocol of
      this entry's network address."
  ::= { nlMatrixTopNEntry 2 }

nlMatrixTopNSourceAddress OBJECT-TYPE

  SYNTAX     OCTET STRING
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The network layer address of the source host in this
      conversation.
      This is represented as an octet string with
      specific semantics and length as identified
      by the associated nlMatrixTopNProtocolDirLocalIndex.
      For example, if the protocolDirLocalIndex indicates an
      encapsulation of ip, this object is encoded as a length
      octet of 4, followed by the 4 octets of the ip address,
      in network byte order."
  ::= { nlMatrixTopNEntry 3 }

nlMatrixTopNDestAddress OBJECT-TYPE

  SYNTAX     OCTET STRING
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION

Waldbusser Standards Track [Page 60] RFC 2021 Remote Network Monitoring MIB January 1997

      "The network layer address of the destination host in this
      conversation.
      This is represented as an octet string with
      specific semantics and length as identified
      by the associated nlMatrixTopNProtocolDirLocalIndex.
      For example, if the nlMatrixTopNProtocolDirLocalIndex
      indicates an encapsulation of ip, this object is encoded as a
      length octet of 4, followed by the 4 octets of the ip address,
      in network byte order."
  ::= { nlMatrixTopNEntry 4 }

nlMatrixTopNPktRate OBJECT-TYPE

  SYNTAX     Gauge32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of packets seen from the source host
      to the destination host during this sampling interval, counted
      using the rules for counting the nlMatrixSDPkts object.
      If the value of nlMatrixTopNControlRateBase is
      nlMatrixTopNPkts, this variable will be used to sort this
      report."
  ::= { nlMatrixTopNEntry 5 }

nlMatrixTopNReversePktRate OBJECT-TYPE

  SYNTAX     Gauge32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of packets seen from the destination host to the
      source host during this sampling interval, counted
      using the rules for counting the nlMatrixSDPkts object (note
      that the corresponding nlMatrixSDPkts object selected is the
      one whose source address is equal to nlMatrixTopNDestAddress
      and whose destination address is equal to
      nlMatrixTopNSourceAddress.)
      Note that if the value of nlMatrixTopNControlRateBase is equal
      to nlMatrixTopNPkts, the sort of topN entries is based
      entirely on nlMatrixTopNPktRate, and not on the value of this
      object."
  ::= { nlMatrixTopNEntry 6 }

nlMatrixTopNOctetRate OBJECT-TYPE

  SYNTAX     Gauge32
  MAX-ACCESS read-only

Waldbusser Standards Track [Page 61] RFC 2021 Remote Network Monitoring MIB January 1997

  STATUS     current
  DESCRIPTION
      "The number of octets seen from the source host
      to the destination host during this sampling interval, counted
      using the rules for counting the nlMatrixSDOctets object.  If
      the value of nlMatrixTopNControlRateBase is
      nlMatrixTopNOctets, this variable will be used to sort this
      report."
  ::= { nlMatrixTopNEntry 7 }

nlMatrixTopNReverseOctetRate OBJECT-TYPE

  SYNTAX     Gauge32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of octets seen from the destination host to the
      source host during this sampling interval, counted
      using the rules for counting the nlMatrixDSOctets object (note
      that the corresponding nlMatrixSDOctets object selected is the
      one whose source address is equal to nlMatrixTopNDestAddress
      and whose destination address is equal to
      nlMatrixTopNSourceAddress.)
      Note that if the value of nlMatrixTopNControlRateBase is equal
      to nlMatrixTopNOctets, the sort of topN entries is based
      entirely on nlMatrixTopNOctetRate, and not on the value of
      this object."
  ::= { nlMatrixTopNEntry 8 }

– Application Layer Functions – – The application layer host, matrix, and matrixTopN functions report – on protocol usage at the network layer or higher. Note that the – use of the term application layer does not imply that only – application-layer protocols are counted, rather it means that – protocols up to and including the application layer are supported.

– – Application Layer Host Group – – Counts the amount of traffic, by protocol, sent from and to each – network address discovered by the probe. – Implementation of this group requires implementation of the Network – Layer Host Group.

alHostTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF AlHostEntry
  MAX-ACCESS  not-accessible

Waldbusser Standards Track [Page 62] RFC 2021 Remote Network Monitoring MIB January 1997

  STATUS      current
  DESCRIPTION
      "A collection of statistics for a particular protocol from a
      particular network address that has been discovered on an
      interface of this device.
      The probe will populate this table for all protocols in the
      protocol directory table whose value of
      protocolDirHostConfig is equal to supportedOn(3), and
      will delete any entries whose protocolDirEntry is deleted or
      has a protocolDirHostConfig value of supportedOff(2).
      The probe will add to this table all addresses
      seen as the source or destination address in all packets with
      no MAC errors, and will increment octet and packet counts in
      the table for all packets with no MAC errors.  Further,
      entries will only be added to this table if their address
      exists in the nlHostTable and will be deleted from this table
      if their address is deleted from the nlHostTable."
  ::= { alHost 1 }

alHostEntry OBJECT-TYPE

  SYNTAX      AlHostEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the alHostTable.
      The hlHostControlIndex value in the index identifies the
      hlHostControlEntry on whose behalf this entry was created.
      The first protocolDirLocalIndex value in the index identifies
      the network layer protocol of the address.
      The nlHostAddress value in the index identifies the network
      layer address of this entry.
      The second protocolDirLocalIndex value in the index identifies
      the protocol that is counted by this entry.
      An example of the indexing in this entry is
      alHostOutPkts.1.783495.18.4.128.2.6.6.34"
  INDEX { hlHostControlIndex, alHostTimeMark,
          protocolDirLocalIndex, nlHostAddress,
          protocolDirLocalIndex }
  ::= { alHostTable 1 }

AlHostEntry ::= SEQUENCE {

  alHostTimeMark                 TimeFilter,
  alHostInPkts                   ZeroBasedCounter32,
  alHostOutPkts                  ZeroBasedCounter32,

Waldbusser Standards Track [Page 63] RFC 2021 Remote Network Monitoring MIB January 1997

  alHostInOctets                 ZeroBasedCounter32,
  alHostOutOctets                ZeroBasedCounter32,
  alHostCreateTime               LastCreateTime

}

alHostTimeMark OBJECT-TYPE

  SYNTAX      TimeFilter
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A TimeFilter for this entry.  See the TimeFilter textual
      convention to see how this works."
  ::= { alHostEntry 1 }

alHostInPkts OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of packets of this protocol type without errors
      transmitted to this address since it was added to the
      alHostTable.  Note that this is the number of link-layer
      packets, so if a single network-layer packet is fragmented
      into several link-layer frames, this counter is incremented
      several times."
  ::= { alHostEntry 2 }

alHostOutPkts OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of packets of this protocol type without errors
      transmitted by this address since it was added to the
      alHostTable.  Note that this is the number of link-layer
      packets, so if a single network-layer packet is fragmented
      into several link-layer frames, this counter is incremented
      several times."
   ::= { alHostEntry 3 }

alHostInOctets OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of octets transmitted to this address
      of this protocol type since it was added to the
      alHostTable (excluding framing bits but including

Waldbusser Standards Track [Page 64] RFC 2021 Remote Network Monitoring MIB January 1997

      FCS octets), excluding those octets in packets that
      contained errors.
      Note this doesn't count just those octets in the particular
      protocol frames, but includes the entire packet that contained
      the protocol."
  ::= { alHostEntry 4 }

alHostOutOctets OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of octets transmitted by this address
      of this protocol type since it was added to the
      alHostTable (excluding framing bits but including
      FCS octets), excluding those octets in packets that
      contained errors.
      Note this doesn't count just those octets in the particular
      protocol frames, but includes the entire packet that contained
      the protocol."
  ::= { alHostEntry 5 }

alHostCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this entry was last activated.
      This can be used by the management station to ensure that the
      entry has not been deleted and recreated between polls."
  ::= { alHostEntry 6 }

– – Application Layer Matrix Group – – Counts the amount of traffic, by protocol, sent between each pair – of network addresses discovered by the probe. – Implementation of this group requires implementation of the Network – Layer Matrix Group.

alMatrixSDTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF AlMatrixSDEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A list of application traffic matrix entries which collect

Waldbusser Standards Track [Page 65] RFC 2021 Remote Network Monitoring MIB January 1997

      statistics for conversations of a particular protocol between
      two network-level addresses.  This table is indexed first by
      the source address and then by the destination address to make
      it convenient to collect all statistics from a particular
      address.
      The probe will populate this table for all protocols in the
      protocol directory table whose value of
      protocolDirMatrixConfig is equal to supportedOn(3), and
      will delete any entries whose protocolDirEntry is deleted or
      has a protocolDirMatrixConfig value of supportedOff(2).
      The probe will add to this table all pairs of addresses for
      all protocols seen in all packets with no MAC errors, and will
      increment octet and packet counts in the table for all packets
      with no MAC errors.  Further, entries will only be added to
      this table if their address pair exists in the nlMatrixSDTable
      and will be deleted from this table if the address pair is
      deleted from the nlMatrixSDTable."
  ::= { alMatrix 1 }

alMatrixSDEntry OBJECT-TYPE

  SYNTAX      AlMatrixSDEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the alMatrixSDTable.
      The hlMatrixControlIndex value in the index identifies the
      hlMatrixControlEntry on whose behalf this entry was created.
      The first protocolDirLocalIndex value in the index identifies
      the network layer protocol of the nlMatrixSDSourceAddress and
      nlMatrixSDDestAddress.
      The nlMatrixSDSourceAddress value in the index identifies the
      network layer address of the source host in this conversation.
      The nlMatrixSDDestAddress value in the index identifies the
      network layer address of the destination host in this
      conversation.
      The second protocolDirLocalIndex value in the index identifies
      the protocol that is counted by this entry.
      An example of the indexing of this entry is
      alMatrixSDPkts.1.783495.18.4.128.2.6.6.4.128.2.6.7.34"
  INDEX { hlMatrixControlIndex, alMatrixSDTimeMark,
          protocolDirLocalIndex,
          nlMatrixSDSourceAddress, nlMatrixSDDestAddress,
          protocolDirLocalIndex }
  ::= { alMatrixSDTable 1 }

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AlMatrixSDEntry ::= SEQUENCE {

  alMatrixSDTimeMark                 TimeFilter,
  alMatrixSDPkts                     ZeroBasedCounter32,
  alMatrixSDOctets                   ZeroBasedCounter32,
  alMatrixSDCreateTime               LastCreateTime

}

alMatrixSDTimeMark OBJECT-TYPE

  SYNTAX      TimeFilter
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A TimeFilter for this entry.  See the TimeFilter textual
      convention to see how this works."
  ::= { alMatrixSDEntry 1 }

alMatrixSDPkts OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of packets of this protocol type without errors
      transmitted from the source address to the destination address
      since this entry was added to the alMatrixSDTable.  Note that
      this is the number of link-layer packets, so if a single
      network-layer packet is fragmented into several link-layer
      frames, this counter is incremented several times."
  ::= { alMatrixSDEntry 2 }

alMatrixSDOctets OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of octets in packets of this protocol type
      transmitted from the source address to the destination address
      since this entry was added to the alMatrixSDTable (excluding
      framing bits but including FCS octets), excluding those octets
      in packets that contained errors.
      Note this doesn't count just those octets in the particular
      protocol frames, but includes the entire packet that contained
      the protocol."
  ::= { alMatrixSDEntry 3 }

alMatrixSDCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only

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  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this entry was last activated.
      This can be used by the management station to ensure that the
      entry has not been deleted and recreated between polls."
  ::= { alMatrixSDEntry 4 }

– Traffic matrix tables from destination to source

alMatrixDSTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF AlMatrixDSEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A list of application traffic matrix entries which collect
      statistics for conversations of a particular protocol between
      two network-level addresses.  This table is indexed first by
      the destination address and then by the source address to make
      it convenient to collect all statistics to a particular
      address.
      The probe will populate this table for all protocols in the
      protocol directory table whose value of
      protocolDirMatrixConfig is equal to supportedOn(3), and
      will delete any entries whose protocolDirEntry is deleted or
      has a protocolDirMatrixConfig value of supportedOff(2).
      The probe will add to this table all pairs of addresses for
      all protocols seen in all packets with no MAC errors, and will
      increment octet and packet counts in the table for all packets
      with no MAC errors.  Further, entries will only be added to
      this table if their address pair exists in the nlMatrixDSTable
      and will be deleted from this table if the address pair is
      deleted from the nlMatrixDSTable."
  ::= { alMatrix 2 }

alMatrixDSEntry OBJECT-TYPE

  SYNTAX      AlMatrixDSEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the alMatrixDSTable.
      The hlMatrixControlIndex value in the index identifies the
      hlMatrixControlEntry on whose behalf this entry was created.
      The first protocolDirLocalIndex value in the index identifies
      the network layer protocol of the alMatrixDSSourceAddress and
      alMatrixDSDestAddress.

Waldbusser Standards Track [Page 68] RFC 2021 Remote Network Monitoring MIB January 1997

      The nlMatrixDSDestAddress value in the index identifies the
      network layer address of the destination host in this
      conversation.
      The nlMatrixDSSourceAddress value in the index identifies the
      network layer address of the source host in this conversation.
      The second protocolDirLocalIndex value in the index identifies
      the protocol that is counted by this entry.
      An example of the indexing of this entry is
      alMatrixDSPkts.1.783495.18.4.128.2.6.7.4.128.2.6.6.34"
  INDEX { hlMatrixControlIndex, alMatrixDSTimeMark,
          protocolDirLocalIndex,
          nlMatrixDSDestAddress, nlMatrixDSSourceAddress,
          protocolDirLocalIndex }
  ::= { alMatrixDSTable 1 }

AlMatrixDSEntry ::= SEQUENCE {

  alMatrixDSTimeMark                 TimeFilter,
  alMatrixDSPkts                     ZeroBasedCounter32,
  alMatrixDSOctets                   ZeroBasedCounter32,
  alMatrixDSCreateTime               LastCreateTime

}

alMatrixDSTimeMark OBJECT-TYPE

  SYNTAX      TimeFilter
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A TimeFilter for this entry.  See the TimeFilter textual
      convention to see how this works."
  ::= { alMatrixDSEntry 1 }

alMatrixDSPkts OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
      "The number of packets of this protocol type without errors
      transmitted from the source address to the destination address
      since this entry was added to the alMatrixDSTable.  Note that
      this is the number of link-layer packets, so if a single
      network-layer packet is fragmented into several link-layer
      frames, this counter is incremented several times."
  ::= { alMatrixDSEntry 2 }

alMatrixDSOctets OBJECT-TYPE

  SYNTAX      ZeroBasedCounter32
  MAX-ACCESS  read-only

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  STATUS      current
  DESCRIPTION
      "The number of octets in packets of this protocol type
      transmitted from the source address to the destination address
      since this entry was added to the alMatrixDSTable (excluding
      framing bits but including FCS octets), excluding those octets
      in packets that contained errors.
      Note this doesn't count just those octets in the particular
      protocol frames, but includes the entire packet that contained
      the protocol."
  ::= { alMatrixDSEntry 3 }

alMatrixDSCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this entry was last activated.
      This can be used by the management station to ensure that the
      entry has not been deleted and recreated between polls."
  ::= { alMatrixDSEntry 4 }

alMatrixTopNControlTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF AlMatrixTopNControlEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A set of parameters that control the creation of a
      report of the top N matrix entries according to
      a selected metric."
  ::= { alMatrix 3 }

alMatrixTopNControlEntry OBJECT-TYPE

  SYNTAX      AlMatrixTopNControlEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
      "A conceptual row in the alMatrixTopNControlTable.
      An example of the indexing of this table is
      alMatrixTopNControlDuration.3"
  INDEX { alMatrixTopNControlIndex }
  ::= { alMatrixTopNControlTable 1 }

AlMatrixTopNControlEntry ::= SEQUENCE {

  alMatrixTopNControlIndex            Integer32,
  alMatrixTopNControlMatrixIndex      Integer32,

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  alMatrixTopNControlRateBase         INTEGER,
  alMatrixTopNControlTimeRemaining    Integer32,
  alMatrixTopNControlGeneratedReports Counter32,
  alMatrixTopNControlDuration         Integer32,
  alMatrixTopNControlRequestedSize    Integer32,
  alMatrixTopNControlGrantedSize      Integer32,
  alMatrixTopNControlStartTime        TimeStamp,
  alMatrixTopNControlOwner            OwnerString,
  alMatrixTopNControlStatus           RowStatus

}

alMatrixTopNControlIndex OBJECT-TYPE

  SYNTAX     Integer32 (1..65535)
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "An index that uniquely identifies an entry
      in the alMatrixTopNControlTable.  Each such
      entry defines one top N report prepared for
      one interface."
  ::= { alMatrixTopNControlEntry 1 }

alMatrixTopNControlMatrixIndex OBJECT-TYPE

  SYNTAX     Integer32 (1..65535)
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The alMatrix[SD/DS] table for which a top N report will be
      prepared on behalf of this entry.  The alMatrix[SD/DS] table
      is identified by the value of the hlMatrixControlIndex
      for that table - that value is used here to identify the
      particular table.
      This object may not be modified if the associated
      alMatrixTopNControlStatus object is equal to active(1)."
  ::= { alMatrixTopNControlEntry 2 }

alMatrixTopNControlRateBase OBJECT-TYPE

  SYNTAX     INTEGER {
                alMatrixTopNTerminalsPkts(1),
                alMatrixTopNTerminalsOctets(2),
                alMatrixTopNAllPkts(3),
                alMatrixTopNAllOctets(4)
             }
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The variable for each alMatrix[SD/DS] entry that the

Waldbusser Standards Track [Page 71] RFC 2021 Remote Network Monitoring MIB January 1997

      alMatrixTopNEntries are sorted by, as well as the
      selector of the view of the matrix table that will be
      used.
      The values alMatrixTopNTerminalsPkts and
      alMatrixTopNTerminalsOctets cause collection only from
      protocols that have no child protocols that are counted.  The
      values alMatrixTopNAllPkts and alMatrixTopNAllOctets cause
      collection from all alMatrix entries.
      This object may not be modified if the associated
      alMatrixTopNControlStatus object is equal to active(1)."
  ::= { alMatrixTopNControlEntry 3 }

alMatrixTopNControlTimeRemaining OBJECT-TYPE

  SYNTAX     Integer32 (0..2147483647)
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The number of seconds left in the report currently
      being collected.  When this object is modified by
      the management station, a new collection is started,
      possibly aborting a currently running report.  The
      new value is used as the requested duration of this
      report, and is immediately loaded into the associated
      alMatrixTopNControlDuration object.
      When the report finishes, the probe will automatically
      start another collection with the same initial value
      of alMatrixTopNControlTimeRemaining.  Thus the management
      station may simply read the resulting reports repeatedly,
      checking the startTime and duration each time to ensure that a
      report was not missed or that the report parameters were not
      changed.
      While the value of this object is non-zero, it decrements
      by one per second until it reaches zero.  At the time
      that this object decrements to zero, the report is made
      accessible in the alMatrixTopNTable, overwriting any report
      that may be there.
      When this object is modified by the management station, any
      associated entries in the alMatrixTopNTable shall be deleted.
      (Note that this is a different algorithm than the one used in
      the hostTopNTable)."
  DEFVAL { 1800 }
  ::= { alMatrixTopNControlEntry 4 }

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alMatrixTopNControlGeneratedReports OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of reports that have been generated by this entry."
  ::= { alMatrixTopNControlEntry 5 }

alMatrixTopNControlDuration OBJECT-TYPE

  SYNTAX     Integer32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of seconds that this report has collected
      during the last sampling interval.
      When the associated alMatrixTopNControlTimeRemaining object
      is set, this object shall be set by the probe to the
      same value and shall not be modified until the next
      time the alMatrixTopNControlTimeRemaining is set.
      This value shall be zero if no reports have been
      requested for this alMatrixTopNControlEntry."
  ::= { alMatrixTopNControlEntry 6 }

alMatrixTopNControlRequestedSize OBJECT-TYPE

  SYNTAX     Integer32 (0..2147483647)
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The maximum number of matrix entries requested for this report.
      When this object is created or modified, the probe
      should set alMatrixTopNControlGrantedSize as closely to this
      object as is possible for the particular probe
      implementation and available resources."
  DEFVAL { 150 }
  ::= { alMatrixTopNControlEntry 7 }

alMatrixTopNControlGrantedSize OBJECT-TYPE

  SYNTAX     Integer32 (0..2147483647)
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The maximum number of matrix entries in this report.
      When the associated alMatrixTopNControlRequestedSize object
      is created or modified, the probe should set this

Waldbusser Standards Track [Page 73] RFC 2021 Remote Network Monitoring MIB January 1997

      object as closely to the requested value as is
      possible for the particular implementation and
      available resources. The probe must not lower this
      value except as a result of a set to the associated
      alMatrixTopNControlRequestedSize object.
      If the value of alMatrixTopNControlRateBase is equal to
      alMatrixTopNTerminalsPkts or alMatrixTopNAllPkts, when the
      next topN report is generated, matrix entries with the highest
      value of alMatrixTopNPktRate shall be placed in this table in
      decreasing order of this rate until there is no more room or
      until there are no more matrix entries.
      If the value of alMatrixTopNControlRateBase is equal to
      alMatrixTopNTerminalsOctets or alMatrixTopNAllOctets, when the
      next topN report is generated, matrix entries with the highest
      value of alMatrixTopNOctetRate shall be placed in this table
      in decreasing order of this rate until there is no more room
      or until there are no more matrix entries.
      It is an implementation-specific matter how entries with the
      same value of alMatrixTopNPktRate or alMatrixTopNOctetRate are
      sorted.  It is also an implementation-specific matter as to
      whether or not zero-valued entries are available."
  ::= { alMatrixTopNControlEntry 8 }

alMatrixTopNControlStartTime OBJECT-TYPE

  SYNTAX     TimeStamp
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this top N report was
      last started.  In other words, this is the time that
      the associated alMatrixTopNControlTimeRemaining object
      was modified to start the requested report or the time
      the report was last automatically (re)started.
      This object may be used by the management station to
      determine if a report was missed or not."
  ::= { alMatrixTopNControlEntry 9 }

alMatrixTopNControlOwner OBJECT-TYPE

  SYNTAX     OwnerString
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The entity that configured this entry and is
      therefore using the resources assigned to it."

Waldbusser Standards Track [Page 74] RFC 2021 Remote Network Monitoring MIB January 1997

  ::= { alMatrixTopNControlEntry 10 }

alMatrixTopNControlStatus OBJECT-TYPE

  SYNTAX     RowStatus
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The status of this alMatrixTopNControlEntry.
      An entry may not exist in the active state unless all
      objects in the entry have an appropriate value.
      If this object is not equal to active(1), all
      associated entries in the alMatrixTopNTable shall be
      deleted by the agent."
  ::= { alMatrixTopNControlEntry 11 }

alMatrixTopNTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF AlMatrixTopNEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "A set of statistics for those application layer matrix
      entries that have counted the highest number of octets or
      packets."
  ::= { alMatrix 4 }

alMatrixTopNEntry OBJECT-TYPE

  SYNTAX     AlMatrixTopNEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "A conceptual row in the alMatrixTopNTable.
      The alMatrixTopNControlIndex value in the index identifies
      the alMatrixTopNControlEntry on whose behalf this entry was
      created.
      An example of the indexing of this table is
      alMatrixTopNPktRate.3.10"
  INDEX { alMatrixTopNControlIndex, alMatrixTopNIndex }
  ::= { alMatrixTopNTable 1 }

AlMatrixTopNEntry ::= SEQUENCE {

  alMatrixTopNIndex                      Integer32,
  alMatrixTopNProtocolDirLocalIndex      Integer32,
  alMatrixTopNSourceAddress              OCTET STRING,
  alMatrixTopNDestAddress                OCTET STRING,

Waldbusser Standards Track [Page 75] RFC 2021 Remote Network Monitoring MIB January 1997

  alMatrixTopNAppProtocolDirLocalIndex   Integer32,
  alMatrixTopNPktRate                    Gauge32,
  alMatrixTopNReversePktRate             Gauge32,
  alMatrixTopNOctetRate                  Gauge32,
  alMatrixTopNReverseOctetRate           Gauge32
}

alMatrixTopNIndex OBJECT-TYPE

  SYNTAX     Integer32 (1..65535)
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "An index that uniquely identifies an entry in
      the alMatrixTopNTable among those in the same report.
      This index is between 1 and N, where N is the
      number of entries in this report.
      If the value of alMatrixTopNControlRateBase is equal to
      alMatrixTopNTerminalsPkts or alMatrixTopNAllPkts, increasing
      values of alMatrixTopNIndex shall be assigned to entries with
      decreasing values of alMatrixTopNPktRate until index N is
      assigned or there are no more alMatrixTopNEntries.
      If the value of alMatrixTopNControlRateBase is equal to
      alMatrixTopNTerminalsOctets or alMatrixTopNAllOctets,
      increasing values of alMatrixTopNIndex shall be assigned to
      entries with decreasing values of alMatrixTopNOctetRate until
      index N is assigned or there are no more alMatrixTopNEntries."
  ::= { alMatrixTopNEntry 1 }

alMatrixTopNProtocolDirLocalIndex OBJECT-TYPE

  SYNTAX     Integer32 (1..2147483647)
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The protocolDirLocalIndex of the network layer protocol of
      this entry's network address."
  ::= { alMatrixTopNEntry 2 }

alMatrixTopNSourceAddress OBJECT-TYPE

  SYNTAX     OCTET STRING
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The network layer address of the source host in this
      conversation.
      This is represented as an octet string with
      specific semantics and length as identified

Waldbusser Standards Track [Page 76] RFC 2021 Remote Network Monitoring MIB January 1997

      by the associated alMatrixTopNProtocolDirLocalIndex.
      For example, if the alMatrixTopNProtocolDirLocalIndex
      indicates an encapsulation of ip, this object is encoded as a
      length octet of 4, followed by the 4 octets of the ip address,
      in network byte order."
  ::= { alMatrixTopNEntry 3 }

alMatrixTopNDestAddress OBJECT-TYPE

  SYNTAX     OCTET STRING
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The network layer address of the destination host in this
      conversation.
      This is represented as an octet string with
      specific semantics and length as identified
      by the associated alMatrixTopNProtocolDirLocalIndex.
      For example, if the alMatrixTopNProtocolDirLocalIndex
      indicates an encapsulation of ip, this object is encoded as a
      length octet of 4, followed by the 4 octets of the ip address,
      in network byte order."
  ::= { alMatrixTopNEntry 4 }

alMatrixTopNAppProtocolDirLocalIndex OBJECT-TYPE

  SYNTAX     Integer32 (1..2147483647)
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The type of the protocol counted by this matrix entry."
  ::= { alMatrixTopNEntry 5 }

alMatrixTopNPktRate OBJECT-TYPE

  SYNTAX     Gauge32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of packets seen of this protocol from the source
      host to the destination host during this sampling interval,
      counted using the rules for counting the alMatrixSDPkts
      object.
      If the value of alMatrixTopNControlRateBase is
      alMatrixTopNTerminalsPkts or alMatrixTopNAllPkts, this
      variable will be used to sort this report."
  ::= { alMatrixTopNEntry 6 }

Waldbusser Standards Track [Page 77] RFC 2021 Remote Network Monitoring MIB January 1997

alMatrixTopNReversePktRate OBJECT-TYPE

  SYNTAX     Gauge32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of packets seen of this protocol from the
      destination host to the source host during this sampling
      interval, counted using the rules for counting the
      alMatrixDSPkts object  (note that the corresponding
      alMatrixSDPkts object selected is the one whose source address
      is equal to alMatrixTopNDestAddress and whose destination
      address is equal to alMatrixTopNSourceAddress.)
      Note that if the value of alMatrixTopNControlRateBase is equal
      to alMatrixTopNTerminalsPkts or alMatrixTopNAllPkts, the sort
      of topN entries is based entirely on alMatrixTopNPktRate, and
      not on the value of this object."
  ::= { alMatrixTopNEntry 7 }

alMatrixTopNOctetRate OBJECT-TYPE

  SYNTAX     Gauge32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of octets seen of this protocol from the source
      host to the destination host during this sampling interval,
      counted using the rules for counting the alMatrixSDOctets
      object.
      If the value of alMatrixTopNControlRateBase is
      alMatrixTopNTerminalsOctets or alMatrixTopNAllOctets, this
      variable will be used to sort this report."
  ::= { alMatrixTopNEntry 8 }

alMatrixTopNReverseOctetRate OBJECT-TYPE

  SYNTAX     Gauge32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The number of octets seen of this protocol from the
      destination host to the source host during this sampling
      interval, counted using the rules for counting the
      alMatrixDSOctets object  (note that the corresponding
      alMatrixSDOctets object selected is the one whose source
      address is equal to alMatrixTopNDestAddress and whose
      destination address is equal to alMatrixTopNSourceAddress.)
      Note that if the value of alMatrixTopNControlRateBase is equal

Waldbusser Standards Track [Page 78] RFC 2021 Remote Network Monitoring MIB January 1997

      to alMatrixTopNTerminalsOctets or alMatrixTopNAllOctets, the
      sort of topN entries is based entirely on
      alMatrixTopNOctetRate, and not on the value of this object."
  ::= { alMatrixTopNEntry 9 }

– – User History Collection Group (usrHistory) – – The usrHistory group combines mechanisms seen in the alarm and – history groups to provide user-specified history collection, – utilizing two additional control tables and one additional data – table. This function has traditionally been done by NMS – applications, via periodic polling. The usrHistory group allows – this task to be offloaded to an RMON probe. – – Data (an ASN.1 INTEGER based object) is collected in the same – manner as any history data table (e.g. etherHistoryTable) except – that the user specifies the MIB instances to be collected. Objects – are collected in bucket-groups, with the intent that all MIB – instances in the same bucket-group are collected as atomically as – possible by the RMON probe. – – The usrHistoryControlTable is a one-dimensional read-create table. – Each row configures a collection of user history buckets, much – the same as a historyControlEntry, except that the creation of a – row in this table will cause one or more associated instances in – the usrHistoryObjectTable to be created. The user specifies the – number of bucket elements (rows in the usrHistoryObjectTable) – requested, as well as the number of buckets requested. – – The usrHistoryObjectTable is a 2-d read-write table. – Each row configures a single MIB instance to be collected. – All rows with the same major index constitute a bucket-group. – – The usrHistoryTable is a 3-d read-only table containing – the data of associated usrHistoryControlEntries. Each – entry represents the value of a single MIB instance – during a specific sampling interval (or the rate of – change during the interval). – – A sample value is stored in two objects - an absolute value and – a status object. This allows numbers from -(2G-1) to +4G to be – stored. The status object also indicates whether a sample is – valid. This allows data collection to continue if periodic – retrieval of a particular instance fails for any reason. – – Row Creation Order Relationships –

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– The static nature of the usrHistoryObjectTable creates – some row creation/modification issues. The rows in this – table need to be set before the associated – usrHistoryControlEntry can be activated. – – Note that the usrHistoryObject entries associated with a – particular usrHistoryControlEntry are not required to – be active before the control entry is activated. However, – the usrHistory data entries associated with an inactive – usrHistoryObject entry will be inactive (i.e. – usrHistoryValStatus == valueNotAvailable). –

usrHistoryControlTable OBJECT-TYPE

  SYNTAX SEQUENCE OF UsrHistoryControlEntry
  MAX-ACCESS not-accessible
  STATUS current
  DESCRIPTION
      "A list of data-collection configuration entries."
  ::= { usrHistory 1 }

usrHistoryControlEntry OBJECT-TYPE

  SYNTAX UsrHistoryControlEntry
  MAX-ACCESS not-accessible
  STATUS current
  DESCRIPTION
      "A list of parameters that set up a group of user-defined
      MIB objects to be sampled periodically (called a
      bucket-group).
      For example, an instance of usrHistoryControlInterval
      might be named usrHistoryControlInterval.1"
  INDEX { usrHistoryControlIndex }
  ::= { usrHistoryControlTable 1 }

UsrHistoryControlEntry ::= SEQUENCE {

  usrHistoryControlIndex             Integer32,
  usrHistoryControlObjects           Integer32,
  usrHistoryControlBucketsRequested  Integer32,
  usrHistoryControlBucketsGranted    Integer32,
  usrHistoryControlInterval          Integer32,
  usrHistoryControlOwner             OwnerString,
  usrHistoryControlStatus            RowStatus

}

usrHistoryControlIndex OBJECT-TYPE

  SYNTAX Integer32 (1..65535)
  MAX-ACCESS not-accessible

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  STATUS current
  DESCRIPTION
      "An index that uniquely identifies an entry in the
      usrHistoryControlTable.  Each such entry defines a
      set of samples at a particular interval for a specified
      set of MIB instances available from the managed system."
  ::= { usrHistoryControlEntry 1 }

usrHistoryControlObjects OBJECT-TYPE

  SYNTAX Integer32 (1..65535)
  MAX-ACCESS read-create
  STATUS current
  DESCRIPTION
      "The number of MIB objects to be collected
      in the portion of usrHistoryTable associated with this
      usrHistoryControlEntry.
      This object may not be modified if the associated instance
      of usrHistoryControlStatus is equal to active(1)."
  ::= { usrHistoryControlEntry 2 }

usrHistoryControlBucketsRequested OBJECT-TYPE

  SYNTAX Integer32 (1..65535)
  MAX-ACCESS read-create
  STATUS current
  DESCRIPTION
      "The requested number of discrete time intervals
      over which data is to be saved in the part of the
      usrHistoryTable associated with this usrHistoryControlEntry.
      When this object is created or modified, the probe
      should set usrHistoryControlBucketsGranted as closely to
      this object as is possible for the particular probe
      implementation and available resources."
  DEFVAL { 50 }
  ::= { usrHistoryControlEntry 3 }

usrHistoryControlBucketsGranted OBJECT-TYPE

  SYNTAX Integer32 (1..65535)
  MAX-ACCESS read-only
  STATUS current
  DESCRIPTION
      "The number of discrete sampling intervals
      over which data shall be saved in the part of
      the usrHistoryTable associated with this
      usrHistoryControlEntry.
      When the associated usrHistoryControlBucketsRequested

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      object is created or modified, the probe should set
      this object as closely to the requested value as is
      possible for the particular  probe implementation and
      available resources.  The probe must not lower this
      value except as a result of a modification to the associated
      usrHistoryControlBucketsRequested object.
      The associated usrHistoryControlBucketsRequested object
      should be set before or at the same time as this object
      to allow the probe to accurately estimate the resources
      required for this usrHistoryControlEntry.
      There will be times when the actual number of buckets
      associated with this entry is less than the value of
      this object.  In this case, at the end of each sampling
      interval, a new bucket will be added to the usrHistoryTable.
      When the number of buckets reaches the value of this object
      and a new bucket is to be added to the usrHistoryTable,
      the oldest bucket associated with this usrHistoryControlEntry
      shall be deleted by the agent so that the new bucket can be
      added.
      When the value of this object changes to a value less than
      the current value, entries are deleted from the
      usrHistoryTable associated with this usrHistoryControlEntry.
      Enough of the oldest of these entries shall be deleted by the
      agent so that their number remains less than or equal to the
      new value of this object.
      When the value of this object changes to a value greater
      than the current value, the number of associated usrHistory
      entries may be allowed to grow."
  ::= { usrHistoryControlEntry 4 }

usrHistoryControlInterval OBJECT-TYPE

  SYNTAX Integer32 (1..2147483647)
  MAX-ACCESS read-create
  STATUS current
  DESCRIPTION
      "The interval in seconds over which the data is
      sampled for each bucket in the part of the usrHistory
      table associated with this usrHistoryControlEntry.
      Because the counters in a bucket may overflow at their
      maximum value with no indication, a prudent manager will
      take into account the possibility of overflow in any of

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      the associated counters. It is important to consider the
      minimum time in which any counter could overflow on a
      particular media type and set the usrHistoryControlInterval
      object to a value less than this interval.
      This object may not be modified if the associated
      usrHistoryControlStatus object is equal to active(1)."
  DEFVAL { 1800 }
  ::= { usrHistoryControlEntry 5 }

usrHistoryControlOwner OBJECT-TYPE

  SYNTAX OwnerString
  MAX-ACCESS read-create
  STATUS current
  DESCRIPTION
      "The entity that configured this entry and is
      therefore using the resources assigned to it."
  ::= { usrHistoryControlEntry 6 }

usrHistoryControlStatus OBJECT-TYPE

  SYNTAX RowStatus
  MAX-ACCESS read-create
  STATUS current
  DESCRIPTION
      "The status of this variable history control entry.
      An entry may not exist in the active state unless all
      objects in the entry have an appropriate value.
      If this object is not equal to active(1), all associated
      entries in the usrHistoryTable shall be deleted."
  ::= { usrHistoryControlEntry 7 }

– Object table

usrHistoryObjectTable OBJECT-TYPE

  SYNTAX SEQUENCE OF UsrHistoryObjectEntry
  MAX-ACCESS not-accessible
  STATUS current
  DESCRIPTION
      "A list of data-collection configuration entries."
  ::= { usrHistory 2 }

usrHistoryObjectEntry OBJECT-TYPE

  SYNTAX UsrHistoryObjectEntry
  MAX-ACCESS not-accessible
  STATUS current
  DESCRIPTION

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      "A list of MIB instances to be sampled periodically.
      Entries in this table are created when an associated
      usrHistoryControlObjects object is created.
      The usrHistoryControlIndex value in the index is
      that of the associated usrHistoryControlEntry.
      For example, an instance of usrHistoryObjectVariable might be
      usrHistoryObjectVariable.1.3"
  INDEX { usrHistoryControlIndex, usrHistoryObjectIndex }
  ::= { usrHistoryObjectTable 1 }

UsrHistoryObjectEntry ::= SEQUENCE {

  usrHistoryObjectIndex             Integer32,
  usrHistoryObjectVariable          OBJECT IDENTIFIER,
  usrHistoryObjectSampleType        INTEGER

}

usrHistoryObjectIndex OBJECT-TYPE

  SYNTAX Integer32 (1..65535)
  MAX-ACCESS not-accessible
  STATUS current
  DESCRIPTION
      "An index used to uniquely identify an entry in the
      usrHistoryObject table.  Each such entry defines a
      MIB instance to be collected periodically."
  ::= { usrHistoryObjectEntry 1 }

usrHistoryObjectVariable OBJECT-TYPE

  SYNTAX OBJECT IDENTIFIER
  MAX-ACCESS read-create
  STATUS current
  DESCRIPTION
      "The object identifier of the particular variable to be
      sampled.
      Only variables that resolve to an ASN.1 primitive type of
      Integer32 (Integer32, Counter, Gauge, or TimeTicks) may be
      sampled.
      Because SNMP access control is articulated entirely in terms
      of the contents of MIB views, no access control mechanism
      exists that can restrict the value of this object to identify
      only those objects that exist in a particular MIB view.
      Because there is thus no acceptable means of restricting the
      read access that could be obtained through the user history

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      mechanism, the probe must only grant write access to this
      object in those views that have read access to all objects on
      the probe.
      During a set operation, if the supplied variable name is not
      available in the selected MIB view, a badValue error must be
      returned.
      This object may not be modified if the associated
      usrHistoryControlStatus object is equal to active(1)."
  ::= { usrHistoryObjectEntry 2 }

usrHistoryObjectSampleType OBJECT-TYPE

  SYNTAX INTEGER {
             absoluteValue(1),
             deltaValue(2)
         }
  MAX-ACCESS read-create
  STATUS current
  DESCRIPTION
      "The method of sampling the selected variable for storage in
      the usrHistoryTable.
      If the value of this object is absoluteValue(1), the value of
      the selected variable will be copied directly into the history
      bucket.
      If the value of this object is deltaValue(2), the value of the
      selected variable at the last sample will be subtracted from
      the current value, and the difference will be stored in the
      history bucket. If the associated usrHistoryObjectVariable
      instance could not be obtained at the previous sample
      interval, then a delta sample is not possible, and the value
      of the associated usrHistoryValStatus object for this interval
      will be valueNotAvailable(1).
      This object may not be modified if the associated
      usrHistoryControlStatus object is equal to active(1)."
  ::= { usrHistoryObjectEntry 3 }

– data table

usrHistoryTable OBJECT-TYPE

  SYNTAX SEQUENCE OF UsrHistoryEntry
  MAX-ACCESS not-accessible
  STATUS current
  DESCRIPTION
      "A list of user defined history entries."

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  ::= { usrHistory 3 }

usrHistoryEntry OBJECT-TYPE

  SYNTAX UsrHistoryEntry
  MAX-ACCESS not-accessible
  STATUS current
  DESCRIPTION
      "A historical sample of user-defined variables.  This sample
      is associated with the usrHistoryControlEntry which set up the
      parameters for a regular collection of these samples.
      The usrHistoryControlIndex value in the index identifies the
      usrHistoryControlEntry on whose behalf this entry was created.
      The usrHistoryObjectIndex value in the index identifies the
      usrHistoryObjectEntry on whose behalf this entry was created.
      For example, an instance of usrHistoryAbsValue, which represents
      the 14th sample of a variable collected as specified by
      usrHistoryControlEntry.1 and usrHistoryObjectEntry.1.5,
      would be named usrHistoryAbsValue.1.14.5"
  INDEX { usrHistoryControlIndex, usrHistorySampleIndex,
          usrHistoryObjectIndex }
  ::= { usrHistoryTable 1 }

UsrHistoryEntry ::= SEQUENCE {

  usrHistorySampleIndex   Integer32,
  usrHistoryIntervalStart TimeStamp,
  usrHistoryIntervalEnd   TimeStamp,
  usrHistoryAbsValue      Gauge32,
  usrHistoryValStatus     INTEGER

}

usrHistorySampleIndex OBJECT-TYPE

  SYNTAX     Integer32 (1..2147483647)
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "An index that uniquely identifies the particular sample this
      entry represents among all samples associated with the same
      usrHistoryControlEntry. This index starts at 1 and increases
      by one as each new sample is taken."
  ::= { usrHistoryEntry 1 }

usrHistoryIntervalStart OBJECT-TYPE

  SYNTAX TimeStamp
  MAX-ACCESS read-only
  STATUS current

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  DESCRIPTION
      "The value of sysUpTime at the start of the interval over
      which this sample was measured.  If the probe keeps track of
      the time of day, it should start the first sample of the
      history at a time such that when the next hour of the day
      begins, a sample is started at that instant.
      Note that following this rule may require the probe to delay
      collecting the first sample of the history, as each sample
      must be of the same interval. Also note that the sample which
      is currently being collected is not accessible in this table
      until the end of its interval."
  ::= { usrHistoryEntry 2 }

usrHistoryIntervalEnd OBJECT-TYPE

  SYNTAX TimeStamp
  MAX-ACCESS read-only
  STATUS current
  DESCRIPTION
      "The value of sysUpTime at the end of the interval over which
      this sample was measured."
  ::= { usrHistoryEntry 3 }

usrHistoryAbsValue OBJECT-TYPE

  SYNTAX Gauge32
  MAX-ACCESS read-only
  STATUS current
  DESCRIPTION
      "The absolute value (i.e. unsigned value) of the
      user-specified statistic during the last sampling period. The
      value during the current sampling period is not made available
      until the period is completed.
      To obtain the true value for this sampling interval, the
      associated instance of usrHistoryValStatus must be checked,
      and usrHistoryAbsValue adjusted as necessary.
      If the MIB instance could not be accessed during the sampling
      interval, then this object will have a value of zero and the
      associated instance of usrHistoryValStatus will be set to
      'valueNotAvailable(1)'."
  ::= { usrHistoryEntry 4 }

usrHistoryValStatus OBJECT-TYPE

  SYNTAX INTEGER {
      valueNotAvailable(1),
      valuePositive(2),

Waldbusser Standards Track [Page 87] RFC 2021 Remote Network Monitoring MIB January 1997

      valueNegative(3)
  }
  MAX-ACCESS read-only
  STATUS current
  DESCRIPTION
      "This object indicates the validity and sign of the data in
      the associated instance of usrHistoryAbsValue.
      If the MIB instance could not be accessed during the sampling
      interval, then 'valueNotAvailable(1)' will be returned.
      If the sample is valid and actual value of the sample is
      greater than or equal to zero then 'valuePositive(2)' is
      returned.
      If the sample is valid and the actual value of the sample is
      less than zero, 'valueNegative(3)' will be returned. The
      associated instance of usrHistoryAbsValue should be multiplied
      by -1 to obtain the true sample value."
  ::= { usrHistoryEntry 5 }

– The Probe Configuration Group – – This group controls the configuration of various operating – parameters of the probe.

ControlString ::= TEXTUAL-CONVENTION

  STATUS current
  DESCRIPTION
      "This data type is used to communicate with a modem or a
      serial data switch.  A ControlString contains embedded
      commands to control how the device will interact with the
      remote device through the serial interface.  Commands are
      represented as two character sequences beginning with
      the `^' character.
      The following commands are recognized by the device (note
      that command characters are case sensitive):
         ^s  Send string that follows which is terminated by the
             next command or the end of string.
         ^c  Delay for the number of seconds that follows.  Toss
             out any data received rather than storing it in a
             buffer for parsing.
         ^t  Set timeout to the value represented by the decimal
             digits that follow.  The default timeout is 20
             seconds. Note that this timeout may be overridden
             by a smaller serialTimeout configured for the

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             associated serial interface (see serialConfigTable).
         ^w  Wait for the reply string that follows which is
             terminated by the next command or the end of string.
             Partial and case insensitive matching is applied, ie.
             if the reply string (any case combination) is found
             anywhere in the received string, then the a match is
             found.  If the current timeout elapses without a match,
             then the remaining control string is ignored.
         ^!  The ^ character.
         ^d  Delay the number of seconds specified by the decimal
             digits that follow.
         ^b  Send break for the number of milliseconds specified by
             the decimal digits that follow.  If no digits follow,
             break will be enforced for 250 milliseconds by default.
      The following ASCII control characters may be inserted into
      the `^s' send string or the `^w' reply string:
         ^@    0x00
         ^A    0x01
          ..
         ^M    0x0D
          ..
         ^Z    0x1A
         ^[    0x1B
         ^    0x1C
         ^]    0x1D
         ^^    0x1E
         ^_    0x1F
      Binary data may also be inserted into the data stream.  The
      control sequence for each byte of binary data is ^0x##, where
      ## is the hexadecimal representation of the data byte.  Two
      ASCII characters (0-9, a-f, A-F) must follow the `^0x'
      control prefix.  For example, `^0x0D^0x0A' is interpreted as a
      carriage return followed by a line feed."
  SYNTAX DisplayString

probeCapabilities OBJECT-TYPE

  SYNTAX BITS {
      etherStats(0),
      historyControl(1),
      etherHistory(2),
      alarm(3),
      hosts(4),
      hostTopN(5),
      matrix(6),
      filter(7),

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      capture(8),
      event(9),
      tokenRingMLStats(10),
      tokenRingPStats(11),
      tokenRingMLHistory(12),
      tokenRingPHistory(13),
      ringStation(14),
      ringStationOrder(15),
      ringStationConfig(16),
      sourceRouting(17),
      protocolDirectory(18),
      protocolDistribution(19),
      addressMapping(20),
      nlHost(21),
      nlMatrix(22),
      alHost(23),
      alMatrix(24),
      usrHistory(25),
      probeConfig(26)
  }
  MAX-ACCESS read-only
  STATUS current
  DESCRIPTION
      "An indication of the RMON MIB groups supported
      on at least one interface by this probe."
  ::= { probeConfig 1 }

probeSoftwareRev OBJECT-TYPE

  SYNTAX     DisplayString (SIZE(0..15))
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The software revision of this device.  This string will have
      a zero length if the revision is unknown."
  ::= { probeConfig 2 }

probeHardwareRev OBJECT-TYPE

  SYNTAX     DisplayString (SIZE(0..31))
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The hardware revision of this device.  This string will have
      a zero length if the revision is unknown."
  ::= { probeConfig 3 }

probeDateTime OBJECT-TYPE

  SYNTAX     OCTET STRING (SIZE (0 | 8 | 11))
  MAX-ACCESS read-write

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  STATUS     current
  DESCRIPTION
      "Probe's current date and time.
       field  octets  contents                  range
       -----  ------  --------                  -----
         1      1-2   year                      0..65536
         2       3    month                     1..12
         3       4    day                       1..31
         4       5    hour                      0..23
         5       6    minutes                   0..59
         6       7    seconds                   0..60
                       (use 60 for leap-second)
         7       8    deci-seconds              0..9
         8       9    direction from UTC        '+' / '-'
         9      10    hours from UTC            0..11
        10      11    minutes from UTC          0..59
       For example, Tuesday May 26, 1992 at 1:30:15 PM
       EDT would be displayed as:
                   1992-5-26,13:30:15.0,-4:0
       Note that if only local time is known, then
       timezone information (fields 8-10) is not
       present, and if no time information is known, the null
       string is returned."
  ::= { probeConfig 4 }

probeResetControl OBJECT-TYPE

  SYNTAX     INTEGER {
                  running(1),
                  warmBoot(2),
                  coldBoot(3)
            }
  MAX-ACCESS read-write
  STATUS     current
  DESCRIPTION
      "Setting this object to warmBoot(2) causes the device to
      restart the application software with current configuration
      parameters saved in non-volatile memory.  Setting this
      object to coldBoot(3) causes the device to reinitialize
      configuration parameters in non-volatile memory to default
      values and restart the application software.  When the device
      is running normally, this variable has a value of
      running(1)."
  ::= { probeConfig 5 }

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– The following download objects do not restrict an implementation – from implementing additional download mechanisms (controlled in an – implementation-specific manner). Further, in the case where the RMON – agent shares a processor with other types of systems, the – implementation is not required to download those non-RMON functions – with this mechanism.

probeDownloadFile OBJECT-TYPE

  SYNTAX     DisplayString (SIZE(0..127))
  MAX-ACCESS read-write
  STATUS     current
  DESCRIPTION
      "The file name to be downloaded from the TFTP server when a
      download is next requested via this MIB.  This value is set to
      the zero length string when no file name has been specified."
  ::= { probeConfig 6 }

probeDownloadTFTPServer OBJECT-TYPE

  SYNTAX     IpAddress
  MAX-ACCESS read-write
  STATUS     current
  DESCRIPTION
      "The IP address of the TFTP server that contains the boot
      image to load when a download is next requested via this MIB.
      This value is set to `0.0.0.0' when no IP address has been
      specified."
  ::= { probeConfig 7 }

probeDownloadAction OBJECT-TYPE

  SYNTAX     INTEGER {
                notDownloading(1),
                downloadToPROM(2),
                downloadToRAM(3)
             }
  MAX-ACCESS read-write
  STATUS     current
  DESCRIPTION
      "When this object is set to downloadToRAM(2) or
      downloadToPROM(3), the device will discontinue its
      normal operation and begin download of the image specified
      by probeDownloadFile from the server specified by
      probeDownloadTFTPServer using the TFTP protocol.  If
      downloadToRAM(2) is specified, the new image is copied
      to RAM only (the old image remains unaltered in the flash
      EPROM).  If downloadToPROM(3) is specified
      the new image is written to the flash EPROM
      memory after its checksum has been verified to be correct.
      When the download process is completed, the device will

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      warm boot to restart the newly loaded application.
      When the device is not downloading, this object will have
      a value of notDownloading(1)."
  ::= { probeConfig 8 }

probeDownloadStatus OBJECT-TYPE

  SYNTAX     INTEGER {
                  downloadSuccess(1),
                  downloadStatusUnknown(2),
                  downloadGeneralError(3),
                  downloadNoResponseFromServer(4),
                  downloadChecksumError(5),
                  downloadIncompatibleImage(6),
                  downloadTftpFileNotFound(7),
                  downloadTftpAccessViolation(8)
             }
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The status of the last download procedure, if any.  This
      object will have a value of downloadStatusUnknown(2) if no
      download process has been performed."
  ::= { probeConfig 9 }

serialConfigTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF SerialConfigEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "A table of serial interface configuration entries.  This data
      will be stored in non-volatile memory and preserved across
      probe resets or power loss."
  ::= { probeConfig 10 }

serialConfigEntry OBJECT-TYPE

  SYNTAX     SerialConfigEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "A set of configuration parameters for a particular
      serial interface on this device. If the device has no serial
      interfaces, this table is empty.
      The index is composed of the ifIndex assigned to this serial
      line interface."
  INDEX  { ifIndex }
  ::= { serialConfigTable 1 }

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SerialConfigEntry ::= SEQUENCE {

  serialMode                   INTEGER,
  serialProtocol               INTEGER,
  serialTimeout                Integer32 (1..65535),
  serialModemInitString        ControlString (SIZE (0..255)),
  serialModemHangUpString      ControlString (SIZE (0..255)),
  serialModemConnectResp       DisplayString (SIZE (0..255)),
  serialModemNoConnectResp     DisplayString (SIZE (0..255)),
  serialDialoutTimeout         Integer32 (1..65535),
  serialStatus                 RowStatus

}

serialMode OBJECT-TYPE

  SYNTAX     INTEGER {
                 direct(1),
                 modem(2)
             }
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The type of incoming connection to expect on this serial
      interface."
  DEFVAL { direct }
  ::= { serialConfigEntry 1 }

serialProtocol OBJECT-TYPE

  SYNTAX     INTEGER {
                 other(1),
                 slip(2),
                 ppp(3)
             }
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The type of data link encapsulation to be used on this
      serial interface."
  DEFVAL { slip }
  ::= { serialConfigEntry 2 }

serialTimeout OBJECT-TYPE

  SYNTAX     Integer32 (1..65535)
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "This timeout value is used when the Management Station has
      initiated the conversation over the serial link. This variable
      represents the number of seconds of inactivity allowed before
      terminating the connection on this serial interface. Use the

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      serialDialoutTimeout in the case where the probe has initiated
      the connection for the purpose of sending a trap."
  DEFVAL { 300 }
  ::= { serialConfigEntry 3 }

serialModemInitString OBJECT-TYPE

  SYNTAX     ControlString (SIZE (0..255))
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "A control string which controls how a modem attached to this
      serial interface should be initialized.  The initialization
      is performed once during startup and again after each
      connection is terminated if the associated serialMode has the
      value of modem(2).
      A control string that is appropriate for a wide variety of
      modems is: '^s^MATE0Q0V1X4 S0=1 S2=43^M'."
  ::= { serialConfigEntry 4 }

serialModemHangUpString OBJECT-TYPE

  SYNTAX     ControlString (SIZE (0..255))
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "A control string which specifies how to disconnect a modem
       connection on this serial interface.  This object is only
       meaningful if the associated serialMode has the value
       of modem(2).
       A control string that is appropriate for a wide variety of
       modems is: '^d2^s+++^d2^sATH0^M^d2'."
  ::= { serialConfigEntry 5 }

serialModemConnectResp OBJECT-TYPE

  SYNTAX     DisplayString (SIZE (0..255))
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "An ASCII string containing substrings that describe the
      expected modem connection response code and associated bps
      rate.  The substrings are delimited by the first character
      in the string, for example:
         /CONNECT/300/CONNECT 1200/1200/CONNECT 2400/2400/
         CONNECT 4800/4800/CONNECT 9600/9600
      will be interpreted as:
          response code    bps rate
          CONNECT            300
          CONNECT 1200      1200

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          CONNECT 2400      2400
          CONNECT 4800      4800
          CONNECT 9600      9600
      The agent will use the information in this string to adjust
      the bps rate of this serial interface once a modem connection
      is established.
      A value that is appropriate for a wide variety of modems is:
      '/CONNECT/300/CONNECT 1200/1200/CONNECT 2400/2400/
       CONNECT 4800/4800/CONNECT 9600/9600/CONNECT 14400/14400/
      CONNECT 19200/19200/CONNECT 38400/38400/'."
  ::= { serialConfigEntry 6 }

serialModemNoConnectResp OBJECT-TYPE

  SYNTAX     DisplayString (SIZE (0..255))
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "An ASCII string containing response codes that may be
      generated by a modem to report the reason why a connection
      attempt has failed.  The response codes are delimited by
      the first character in the string, for example:
         /NO CARRIER/BUSY/NO DIALTONE/NO ANSWER/ERROR/
      If one of these response codes is received via this serial
      interface while attempting to make a modem connection,
      the agent will issue the hang up command as specified by
      serialModemHangUpString.
      A value that is appropriate for a wide variety of modems is:
      '/NO CARRIER/BUSY/NO DIALTONE/NO ANSWER/ERROR/'."
  ::= { serialConfigEntry 7 }

serialDialoutTimeout OBJECT-TYPE

  SYNTAX     Integer32 (1..65535)
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "This timeout value is used when the probe initiates the
      serial connection with the intention of contacting a
      management station. This variable represents the number
      of seconds of inactivity allowed before terminating the
      connection on this serial interface."
  DEFVAL { 20 }
  ::= { serialConfigEntry 8 }

serialStatus OBJECT-TYPE

  SYNTAX     RowStatus
  MAX-ACCESS read-create

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  STATUS     current
  DESCRIPTION
      "The status of this serialConfigEntry.
      An entry may not exist in the active state unless all
      objects in the entry have an appropriate value."
  ::= { serialConfigEntry 9 }

netConfigTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF NetConfigEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "A table of netConfigEntries."
  ::= { probeConfig 11 }

netConfigEntry OBJECT-TYPE

  SYNTAX     NetConfigEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "A set of configuration parameters for a particular
      network interface on this device. If the device has no network
      interface, this table is empty.
      The index is composed of the ifIndex assigned to the
      corresponding interface."
  INDEX  { ifIndex }
  ::= { netConfigTable 1 }

NetConfigEntry ::= SEQUENCE {

  netConfigIPAddress         IpAddress,
  netConfigSubnetMask        IpAddress,
  netConfigStatus            RowStatus

}

netConfigIPAddress OBJECT-TYPE

  SYNTAX     IpAddress
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The IP address of this Net interface.  The default value
      for this object is 0.0.0.0.  If either the netConfigIPAddress
      or netConfigSubnetMask are 0.0.0.0, then when the device
      boots, it may use BOOTP to try to figure out what these
      values should be. If BOOTP fails, before the device
      can talk on the network, this value must be configured
      (e.g., through a terminal attached to the device). If BOOTP is

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      used, care should be taken to not send BOOTP broadcasts too
      frequently and to eventually send very infrequently if no
      replies are received."
  ::= { netConfigEntry 1 }

netConfigSubnetMask OBJECT-TYPE

  SYNTAX     IpAddress
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The subnet mask of this Net interface.  The default value
      for this object is 0.0.0.0.  If either the netConfigIPAddress
      or netConfigSubnetMask are 0.0.0.0, then when the device
      boots, it may use BOOTP to try to figure out what these
      values should be. If BOOTP fails, before the device
      can talk on the network, this value must be configured
      (e.g., through a terminal attached to the device). If BOOTP is
      used, care should be taken to not send BOOTP broadcasts too
      frequently and to eventually send very infrequently if no
      replies are received."
  ::= { netConfigEntry 2 }

netConfigStatus OBJECT-TYPE

  SYNTAX     RowStatus
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The status of this netConfigEntry.
      An entry may not exist in the active state unless all
      objects in the entry have an appropriate value."
  ::= { netConfigEntry 3 }

netDefaultGateway OBJECT-TYPE

  SYNTAX     IpAddress
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The IP Address of the default gateway.  If this value is
      undefined or unknown, it shall have the value 0.0.0.0."
  ::= { probeConfig 12 }

– Trap Destination Table – – This table defines the destination addresses for traps generated – from the device. This table maps a community to one or more trap – destination entries. –

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– The same trap will be sent to all destinations specified in the – entries that have the same trapDestCommunity as the eventCommunity – (as defined by RMON MIB). Information in this table will be stored – in non-volatile memory. If the device has gone through a hard – restart, this information will be reset to its default state.

trapDestTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF TrapDestEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "A list of trap destination entries."
  ::= { probeConfig 13 }

trapDestEntry OBJECT-TYPE

  SYNTAX     TrapDestEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "This entry includes a destination IP address to which to send
      traps for this community."
  INDEX { trapDestIndex }
  ::= { trapDestTable 1 }

TrapDestEntry ::= SEQUENCE {

  trapDestIndex               Integer32,
  trapDestCommunity           OCTET STRING,
  trapDestProtocol            INTEGER,
  trapDestAddress             OCTET STRING,
  trapDestOwner               OwnerString,
  trapDestStatus              RowStatus

}

trapDestIndex OBJECT-TYPE

  SYNTAX     Integer32 (1..65535)
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "A value that uniquely identifies this trapDestEntry."
  ::= { trapDestEntry 1 }

trapDestCommunity OBJECT-TYPE

  SYNTAX     OCTET STRING (SIZE(0..127))
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "A community to which this destination address belongs.
      This entry is associated with any eventEntries in the RMON

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      MIB whose value of eventCommunity is equal to the value of
      this object.  Every time an associated event entry sends a
      trap due to an event, that trap will be sent to each
      address in the trapDestTable with a trapDestCommunity equal to
      eventCommunity.
      This object may not be modified if the associated
      trapDestStatus object is equal to active(1)."
  ::= { trapDestEntry 2 }

trapDestProtocol OBJECT-TYPE

  SYNTAX     INTEGER {
                  ip(1),
                  ipx(2)
              }
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The protocol with which to send this trap."
  ::= { trapDestEntry 3 }

trapDestAddress OBJECT-TYPE

  SYNTAX     OCTET STRING
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The address to send traps on behalf of this entry.
      If the associated trapDestProtocol object is equal to ip(1),
      the encoding of this object is the same as the snmpUDPAddress
      textual convention in [RFC1906]:
        -- for a SnmpUDPAddress of length 6:
        --
        -- octets   contents        encoding
        --  1-4     IP-address      network-byte order
        --  5-6     UDP-port        network-byte order
      If the associated trapDestProtocol object is equal to ipx(2),
      the encoding of this object is the same as the snmpIPXAddress
      textual convention in [RFC1906]:
        -- for a SnmpIPXAddress of length 12:
        --
        -- octets   contents            encoding
        --  1-4     network-number      network-byte order
        --  5-10    physical-address    network-byte order
        -- 11-12    socket-number       network-byte order
      This object may not be modified if the associated

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      trapDestStatus object is equal to active(1)."
  ::= { trapDestEntry 4 }

trapDestOwner OBJECT-TYPE

  SYNTAX     OwnerString
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The entity that configured this entry and is
      therefore using the resources assigned to it."
  ::= { trapDestEntry 5 }

trapDestStatus OBJECT-TYPE

  SYNTAX     RowStatus
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The status of this trap destination entry.
      An entry may not exist in the active state unless all
      objects in the entry have an appropriate value."
  ::= { trapDestEntry 6 }

– Serial Connection Table – – The device may communicate with a management station using – SLIP. In order for the device to send traps via SLIP, it must – be able to initiate a connection over the serial interface. The – serialConnectionTable stores the parameters for such connection – initiation.

serialConnectionTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF SerialConnectionEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "A list of serialConnectionEntries."
  ::= { probeConfig 14 }

serialConnectionEntry OBJECT-TYPE

  SYNTAX     SerialConnectionEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Configuration for a SLIP link over a serial line."
  INDEX { serialConnectIndex }
  ::= { serialConnectionTable 1 }

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SerialConnectionEntry ::= SEQUENCE {

  serialConnectIndex                   Integer32,
  serialConnectDestIpAddress           IpAddress,
  serialConnectType                    INTEGER,
  serialConnectDialString              ControlString,
  serialConnectSwitchConnectSeq        ControlString,
  serialConnectSwitchDisconnectSeq     ControlString,
  serialConnectSwitchResetSeq          ControlString,
  serialConnectOwner                   OwnerString,
  serialConnectStatus                  RowStatus

}

serialConnectIndex OBJECT-TYPE

  SYNTAX     Integer32 (1..65535)
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "A value that uniquely identifies this serialConnection
      entry."
  ::= { serialConnectionEntry 1 }

serialConnectDestIpAddress OBJECT-TYPE

  SYNTAX     IpAddress
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The IP Address that can be reached at the other end of this
      serial connection.
      This object may not be modified if the associated
      serialConnectStatus object is equal to active(1)."
  ::= { serialConnectionEntry 2 }

serialConnectType OBJECT-TYPE

  SYNTAX     INTEGER {
                  direct(1),
                  modem(2),
                  switch(3),
                  modemSwitch(4)
             }
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The type of outgoing connection to make.  If this object
      has the value direct(1), then a direct serial connection
      is assumed.  If this object has the value modem(2),
      then serialConnectDialString will be used to make a modem
      connection.  If this object has the value switch(3),

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      then serialConnectSwitchConnectSeq will be used to establish
      the connection over a serial data switch, and
      serialConnectSwitchDisconnectSeq will be used to terminate
      the connection.  If this object has the value
      modem-switch(4), then a modem connection will be made first
      followed by the switch connection.
      This object may not be modified if the associated
      serialConnectStatus object is equal to active(1)."
  DEFVAL { direct }
  ::= { serialConnectionEntry 3 }

serialConnectDialString OBJECT-TYPE

  SYNTAX     ControlString (SIZE(0..255))
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "A control string which specifies how to dial the phone
      number in order to establish a modem connection.  The
      string should include dialing prefix and suffix.  For
      example: ``^s^MATD9,888-1234^M'' will instruct the Probe
      to send a carriage return followed by the dialing prefix
      ``ATD'', the phone number ``9,888-1234'', and a carriage
      return as the dialing suffix.
      This object may not be modified if the associated
      serialConnectStatus object is equal to active(1)."
  ::= { serialConnectionEntry 4 }

serialConnectSwitchConnectSeq OBJECT-TYPE

  SYNTAX     ControlString (SIZE(0..255))
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "A control string which specifies how to establish a
      data switch connection.
      This object may not be modified if the associated
      serialConnectStatus object is equal to active(1)."
   ::= { serialConnectionEntry 5 }

serialConnectSwitchDisconnectSeq OBJECT-TYPE

  SYNTAX     ControlString (SIZE(0..255))
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "A control string which specifies how to terminate a
      data switch connection.
      This object may not be modified if the associated

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      serialConnectStatus object is equal to active(1)."
  ::= { serialConnectionEntry 6 }

serialConnectSwitchResetSeq OBJECT-TYPE

  SYNTAX     ControlString (SIZE(0..255))
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "A control string which specifies how to reset a data
      switch in the event of a timeout.
      This object may not be modified if the associated
      serialConnectStatus object is equal to active(1)."
  ::= { serialConnectionEntry 7 }

serialConnectOwner OBJECT-TYPE

  SYNTAX     OwnerString
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The entity that configured this entry and is
      therefore using the resources assigned to it."
  ::= { serialConnectionEntry 8 }

serialConnectStatus OBJECT-TYPE

  SYNTAX     RowStatus
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "The status of this serialConnectionEntry.
      If the manager attempts to set this object to active(1) when
      the serialConnectType is set to modem(2) or modem-switch(4)
      and the serialConnectDialString is a zero-length string or
      cannot be correctly parsed as a ConnectString, the set
      request will be rejected with badValue(3).
      If the manager attempts to set this object to active(1) when
      the serialConnectType is set to switch(3) or modem-switch(4)
      and the serialConnectSwitchConnectSeq,
      the serialConnectSwitchDisconnectSeq, or
      the serialConnectSwitchResetSeq are zero-length strings
      or cannot be correctly parsed as ConnectStrings, the set
      request will be rejected with badValue(3).
      An entry may not exist in the active state unless all
      objects in the entry have an appropriate value."
  ::= { serialConnectionEntry 9 }

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– – Extensions to the RMON 1 MIB for RMON 2 devices – – These extensions include the standard LastCreateTime Textual – Convention for all control tables, as well as an augmentation of – the filter entry that provides variable-length offsets into – packets.

– Each of the following, except for filterDroppedFrames, is a – read-only object which, if implemented, automatically appears when – the RMON1 row it is associated with is created.

etherStats2Table OBJECT-TYPE

  SYNTAX     SEQUENCE OF EtherStats2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  ::= { statistics 4 }

etherStats2Entry OBJECT-TYPE

  SYNTAX     EtherStats2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  AUGMENTS { etherStatsEntry }
  ::= { etherStats2Table 1 }

EtherStats2Entry ::= SEQUENCE {

  etherStatsDroppedFrames     Counter32,
  etherStatsCreateTime        LastCreateTime

}

etherStatsDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for this entry for
      whatever reason.  Most often, this event occurs when the probe
      is out of some resources and decides to shed load from this
      collection.
      This count does not include packets that were not counted

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      because they had MAC-layer errors.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { etherStats2Entry 1 }

etherStatsCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this control entry was last
      activated. This can be used by the management station to
      ensure that the table has not been deleted and recreated
      between polls."
  ::= { etherStats2Entry 2 }

historyControl2Table OBJECT-TYPE

  SYNTAX     SEQUENCE OF HistoryControl2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  ::= { history 5 }

historyControl2Entry OBJECT-TYPE

  SYNTAX     HistoryControl2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  AUGMENTS { historyControlEntry }
  ::= { historyControl2Table 1 }

HistoryControl2Entry ::= SEQUENCE {

  historyControlDroppedFrames Counter32

}

historyControlDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for this entry for
      whatever reason.  Most often, this event occurs when the probe
      is out of some resources and decides to shed load from this

Waldbusser Standards Track [Page 106] RFC 2021 Remote Network Monitoring MIB January 1997

      collection.
      This count does not include packets that were not counted
      because they had MAC-layer errors.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { historyControl2Entry 1 }

hostControl2Table OBJECT-TYPE

  SYNTAX     SEQUENCE OF HostControl2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  ::= { hosts 4 }

hostControl2Entry OBJECT-TYPE

  SYNTAX     HostControl2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  AUGMENTS { hostControlEntry }
  ::= { hostControl2Table 1 }

HostControl2Entry ::= SEQUENCE {

  hostControlDroppedFrames    Counter32,
  hostControlCreateTime       LastCreateTime

}

hostControlDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for this entry for
      whatever reason.  Most often, this event occurs when the probe
      is out of some resources and decides to shed load from this
      collection.
      This count does not include packets that were not counted
      because they had MAC-layer errors.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."

Waldbusser Standards Track [Page 107] RFC 2021 Remote Network Monitoring MIB January 1997

  ::= { hostControl2Entry 1 }

hostControlCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this control entry was last
      activated. This can be used by the management station to
      ensure that the table has not been deleted and recreated
      between polls."
  ::= { hostControl2Entry 2 }

matrixControl2Table OBJECT-TYPE

  SYNTAX     SEQUENCE OF MatrixControl2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  ::= { matrix 4 }

matrixControl2Entry OBJECT-TYPE

  SYNTAX     MatrixControl2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  AUGMENTS { matrixControlEntry }
  ::= { matrixControl2Table 1 }

MatrixControl2Entry ::= SEQUENCE {

  matrixControlDroppedFrames  Counter32,
  matrixControlCreateTime     LastCreateTime

}

matrixControlDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for this entry for
      whatever reason.  Most often, this event occurs when the probe
      is out of some resources and decides to shed load from this
      collection.
      This count does not include packets that were not counted

Waldbusser Standards Track [Page 108] RFC 2021 Remote Network Monitoring MIB January 1997

      because they had MAC-layer errors.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { matrixControl2Entry 1 }

matrixControlCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this control entry was last
      activated. This can be used by the management station to
      ensure that the table has not been deleted and recreated
      between polls."
  ::= { matrixControl2Entry 2 }

channel2Table OBJECT-TYPE

  SYNTAX     SEQUENCE OF Channel2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  ::= { filter 3 }

channel2Entry OBJECT-TYPE

  SYNTAX     Channel2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  AUGMENTS { channelEntry }
  ::= { channel2Table 1 }

Channel2Entry ::= SEQUENCE {

  channelDroppedFrames    Counter32,
  channelCreateTime       LastCreateTime

}

channelDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for this entry for
      whatever reason.  Most often, this event occurs when the probe

Waldbusser Standards Track [Page 109] RFC 2021 Remote Network Monitoring MIB January 1997

      is out of some resources and decides to shed load from this
      collection.
      This count does not include packets that were not counted
      because they had MAC-layer errors.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { channel2Entry 1 }

channelCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this control entry was last
      activated. This can be used by the management station to
      ensure that the table has not been deleted and recreated
      between polls."
  ::= { channel2Entry 2 }

tokenRingMLStats2Table OBJECT-TYPE

  SYNTAX     SEQUENCE OF TokenRingMLStats2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  ::= { statistics 5 }

tokenRingMLStats2Entry OBJECT-TYPE

  SYNTAX     TokenRingMLStats2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  AUGMENTS { tokenRingMLStatsEntry }
  ::= { tokenRingMLStats2Table 1 }

TokenRingMLStats2Entry ::= SEQUENCE {

  tokenRingMLStatsDroppedFrames       Counter32,
  tokenRingMLStatsCreateTime          LastCreateTime

}

tokenRingMLStatsDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION

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     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for this entry for
      whatever reason.  Most often, this event occurs when the probe
      is out of some resources and decides to shed load from this
      collection.
      This count does not include packets that were not counted
      because they had MAC-layer errors.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { tokenRingMLStats2Entry 1 }

tokenRingMLStatsCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this control entry was last activated.
      This can be used by the management station to ensure that the
      table has not been deleted and recreated between polls."
  ::= { tokenRingMLStats2Entry 2 }

tokenRingPStats2Table OBJECT-TYPE

  SYNTAX     SEQUENCE OF TokenRingPStats2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  ::= { statistics 6 }

tokenRingPStats2Entry OBJECT-TYPE

  SYNTAX     TokenRingPStats2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  AUGMENTS {  tokenRingPStatsEntry }
  ::= { tokenRingPStats2Table 1 }

TokenRingPStats2Entry ::= SEQUENCE {

  tokenRingPStatsDroppedFrames    Counter32,
  tokenRingPStatsCreateTime       LastCreateTime

}

tokenRingPStatsDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32

Waldbusser Standards Track [Page 111] RFC 2021 Remote Network Monitoring MIB January 1997

  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for this entry for
      whatever reason.  Most often, this event occurs when the probe
      is out of some resources and decides to shed load from this
      collection.
      This count does not include packets that were not counted
      because they had MAC-layer errors.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { tokenRingPStats2Entry 1 }

tokenRingPStatsCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this control entry was last activated.
      This can be used by the management station to ensure that the
      table has not been deleted and recreated between polls."
  ::= { tokenRingPStats2Entry 2 }

ringStationControl2Table OBJECT-TYPE

  SYNTAX     SEQUENCE OF RingStationControl2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  ::= { tokenRing 7 }

ringStationControl2Entry OBJECT-TYPE

  SYNTAX     RingStationControl2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  AUGMENTS { ringStationControlEntry }
  ::= { ringStationControl2Table 1 }

RingStationControl2Entry ::= SEQUENCE {

  ringStationControlDroppedFrames Counter32,
  ringStationControlCreateTime    LastCreateTime

}

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ringStationControlDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for this entry for
      whatever reason.  Most often, this event occurs when the probe
      is out of some resources and decides to shed load from this
      collection.
      This count does not include packets that were not counted
      because they had MAC-layer errors.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { ringStationControl2Entry 1 }

ringStationControlCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this control entry was last activated.
      This can be used by the management station to ensure that the
      table has not been deleted and recreated between polls."
  ::= { ringStationControl2Entry 2 }

sourceRoutingStats2Table OBJECT-TYPE

  SYNTAX     SEQUENCE OF SourceRoutingStats2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  ::= { tokenRing 8 }

sourceRoutingStats2Entry OBJECT-TYPE

  SYNTAX     SourceRoutingStats2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Contains the RMON-2 augmentations to RMON-1."
  AUGMENTS { sourceRoutingStatsEntry }
  ::= { sourceRoutingStats2Table 1 }

SourceRoutingStats2Entry ::= SEQUENCE {

  sourceRoutingStatsDroppedFrames Counter32,

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  sourceRoutingStatsCreateTime    LastCreateTime

}

sourceRoutingStatsDroppedFrames OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
     "The total number of frames which were received by the probe
      and therefore not accounted for in the *StatsDropEvents, but
      for which the probe chose not to count for this entry for
      whatever reason.  Most often, this event occurs when the probe
      is out of some resources and decides to shed load from this
      collection.
      This count does not include packets that were not counted
      because they had MAC-layer errors.
      Note that, unlike the dropEvents counter, this number is the
      exact number of frames dropped."
  ::= { sourceRoutingStats2Entry 1 }

sourceRoutingStatsCreateTime OBJECT-TYPE

  SYNTAX     LastCreateTime
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
      "The value of sysUpTime when this control entry was last activated.
      This can be used by the management station to ensure that the
      table has not been deleted and recreated between polls."
  ::= { sourceRoutingStats2Entry 2 }

filter2Table OBJECT-TYPE

  SYNTAX     SEQUENCE OF Filter2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Provides a variable-length packet filter feature to the
      RMON-1 filter table."
  ::= { filter 4 }

filter2Entry OBJECT-TYPE

  SYNTAX     Filter2Entry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
      "Provides a variable-length packet filter feature to the
      RMON-1 filter table."

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  AUGMENTS { filterEntry }
  ::= { filter2Table 1 }

Filter2Entry ::= SEQUENCE {

  filterProtocolDirDataLocalIndex     Integer32,
  filterProtocolDirLocalIndex         Integer32

}

filterProtocolDirDataLocalIndex OBJECT-TYPE

  SYNTAX     Integer32 (0..2147483647)
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "When this object is set to a non-zero value, the filter that
      it is associated with performs the following operations on
      every packet:
      1) - If the packet doesn't match the protocol directory entry
           identified by this object, discard the packet and exit
           (i.e., discard the packet if it is not of the identified
           protocol).
      2) - If the associated filterProtocolDirLocalIndex is non-zero
           and the packet doesn't match the protocol directory
           entry identified by that object, discard the packet and
           exit
      3) - If the packet matches, perform the regular filter
           algorithm as if the beginning of this named protocol is
           the beginning of the packet, potentially applying the
           filterOffset value to move further into the packet."
  DEFVAL { 0 }
  ::= { filter2Entry 1 }

filterProtocolDirLocalIndex OBJECT-TYPE

  SYNTAX     Integer32 (0..2147483647)
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
      "When this object is set to a non-zero value, the filter that
      it is associated with will discard the packet if the packet
      doesn't match this protocol directory entry."
  DEFVAL { 0 }
  ::= { filter2Entry 2 }

– Conformance Macros

rmon2MIBCompliances OBJECT IDENTIFIER ::= { rmonConformance 1 } rmon2MIBGroups OBJECT IDENTIFIER ::= { rmonConformance 2 }

Waldbusser Standards Track [Page 115] RFC 2021 Remote Network Monitoring MIB January 1997

rmon2MIBCompliance MODULE-COMPLIANCE

  STATUS  current
  DESCRIPTION
      "Describes the requirements for conformance to
      the RMON2 MIB"
  MODULE  -- this module
      MANDATORY-GROUPS { protocolDirectoryGroup,
                         protocolDistributionGroup,
                         addressMapGroup,
                         nlHostGroup,
                         nlMatrixGroup,
                         usrHistoryGroup,
                         probeInformationGroup }
      GROUP   rmon1EnhancementGroup
      DESCRIPTION
          "The rmon1EnhancementGroup is mandatory for systems which
          implement RMON [RFC1757]"
  ::= { rmon2MIBCompliances 1 }

rmon2MIBApplicationLayerCompliance MODULE-COMPLIANCE

  STATUS  current
  DESCRIPTION
      "Describes the requirements for conformance to
      the RMON2 MIB with Application Layer Enhancements."
  MODULE  -- this module
      MANDATORY-GROUPS { protocolDirectoryGroup,
                         protocolDistributionGroup,
                         addressMapGroup,
                         nlHostGroup,
                         nlMatrixGroup,
                         alHostGroup,
                         alMatrixGroup,
                         usrHistoryGroup,
                         probeInformationGroup }
      GROUP   rmon1EnhancementGroup
      DESCRIPTION
          "The rmon1EnhancementGroup is mandatory for systems which
          implement RMON [RFC1757]"
  ::= { rmon2MIBCompliances 2 }

protocolDirectoryGroup OBJECT-GROUP

  OBJECTS { protocolDirLastChange,
            protocolDirLocalIndex, protocolDirDescr,
            protocolDirType, protocolDirAddressMapConfig,
            protocolDirHostConfig, protocolDirMatrixConfig,

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            protocolDirOwner, protocolDirStatus }
  STATUS  current
  DESCRIPTION
      "Lists the inventory of protocols the probe has the capability
      of monitoring and allows the addition, deletion, and
      configuration of entries in this list."
  ::= { rmon2MIBGroups 1 }

protocolDistributionGroup OBJECT-GROUP

  OBJECTS { protocolDistControlDataSource,
            protocolDistControlDroppedFrames,
            protocolDistControlCreateTime,
            protocolDistControlOwner, protocolDistControlStatus,
            protocolDistStatsPkts, protocolDistStatsOctets }
  STATUS  current
  DESCRIPTION
      "Collects the relative amounts of octets and packets for the
      different protocols detected on a network segment."
  ::= { rmon2MIBGroups 2 }

addressMapGroup OBJECT-GROUP

  OBJECTS { addressMapInserts, addressMapDeletes,
            addressMapMaxDesiredEntries,
            addressMapControlDataSource,
            addressMapControlDroppedFrames,
            addressMapControlOwner, addressMapControlStatus,
            addressMapPhysicalAddress,
            addressMapLastChange }
  STATUS  current
  DESCRIPTION
      "Lists MAC address to network address bindings discovered by
      the probe and what interface they were last seen on."
  ::= { rmon2MIBGroups 3 }

nlHostGroup OBJECT-GROUP

  OBJECTS { hlHostControlDataSource,
            hlHostControlNlDroppedFrames, hlHostControlNlInserts,
            hlHostControlNlDeletes,
            hlHostControlNlMaxDesiredEntries,
            hlHostControlAlDroppedFrames, hlHostControlAlInserts,
            hlHostControlAlDeletes,
            hlHostControlAlMaxDesiredEntries, hlHostControlOwner,
            hlHostControlStatus, nlHostInPkts, nlHostOutPkts,
            nlHostInOctets, nlHostOutOctets,
            nlHostOutMacNonUnicastPkts, nlHostCreateTime }
  STATUS  current
  DESCRIPTION
      "Counts the amount of traffic sent from and to each network

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      address discovered by the probe. Note that while the
      hlHostControlTable also has objects that control an optional
      alHostTable, implementation of the alHostTable is not required
      to fully implement this group."
  ::= { rmon2MIBGroups 4 }

nlMatrixGroup OBJECT-GROUP

  OBJECTS { hlMatrixControlDataSource,
            hlMatrixControlNlDroppedFrames,
            hlMatrixControlNlInserts, hlMatrixControlNlDeletes,
            hlMatrixControlNlMaxDesiredEntries,
            hlMatrixControlAlDroppedFrames,
            hlMatrixControlAlInserts, hlMatrixControlAlDeletes,
            hlMatrixControlAlMaxDesiredEntries,
            hlMatrixControlOwner, hlMatrixControlStatus,
            nlMatrixSDPkts, nlMatrixSDOctets, nlMatrixSDCreateTime,
            nlMatrixDSPkts, nlMatrixDSOctets, nlMatrixDSCreateTime,
            nlMatrixTopNControlMatrixIndex,
            nlMatrixTopNControlRateBase,
            nlMatrixTopNControlTimeRemaining,
            nlMatrixTopNControlGeneratedReports,
            nlMatrixTopNControlDuration,
            nlMatrixTopNControlRequestedSize,
            nlMatrixTopNControlGrantedSize,
            nlMatrixTopNControlStartTime,
            nlMatrixTopNControlOwner, nlMatrixTopNControlStatus,
            nlMatrixTopNProtocolDirLocalIndex,
            nlMatrixTopNSourceAddress, nlMatrixTopNDestAddress,
            nlMatrixTopNPktRate, nlMatrixTopNReversePktRate,
            nlMatrixTopNOctetRate, nlMatrixTopNReverseOctetRate }
  STATUS  current
  DESCRIPTION
      "Counts the amount of traffic sent between each pair of
      network addresses discovered by the probe. Note that while the
      hlMatrixControlTable also has objects that control optional
      alMatrixTables, implementation of the alMatrixTables is not
      required to fully implement this group."
  ::= { rmon2MIBGroups 5 }

alHostGroup OBJECT-GROUP

  OBJECTS { alHostInPkts, alHostOutPkts,
            alHostInOctets, alHostOutOctets, alHostCreateTime }
  STATUS  current
  DESCRIPTION
      "Counts the amount of traffic, by protocol, sent from and to
      each network address discovered by the probe. Implementation
      of this group requires implementation of the Network Layer
      Host Group."

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  ::= { rmon2MIBGroups 6 }

alMatrixGroup OBJECT-GROUP

  OBJECTS { alMatrixSDPkts, alMatrixSDOctets, alMatrixSDCreateTime,
            alMatrixDSPkts, alMatrixDSOctets, alMatrixDSCreateTime,
            alMatrixTopNControlMatrixIndex,
            alMatrixTopNControlRateBase,
            alMatrixTopNControlTimeRemaining,
            alMatrixTopNControlGeneratedReports,
            alMatrixTopNControlDuration,
            alMatrixTopNControlRequestedSize,
            alMatrixTopNControlGrantedSize,
            alMatrixTopNControlStartTime,
            alMatrixTopNControlOwner, alMatrixTopNControlStatus,
            alMatrixTopNProtocolDirLocalIndex,
            alMatrixTopNSourceAddress, alMatrixTopNDestAddress,
            alMatrixTopNAppProtocolDirLocalIndex,
            alMatrixTopNPktRate, alMatrixTopNReversePktRate,
            alMatrixTopNOctetRate, alMatrixTopNReverseOctetRate }
  STATUS  current
  DESCRIPTION
      "Counts the amount of traffic, by protocol, sent between each
      pair of network addresses discovered by the
      probe. Implementation of this group requires implementation of
      the Network Layer Matrix Group."
  ::= { rmon2MIBGroups 7 }

usrHistoryGroup OBJECT-GROUP

  OBJECTS { usrHistoryControlObjects,
            usrHistoryControlBucketsRequested,
            usrHistoryControlBucketsGranted,
            usrHistoryControlInterval,
            usrHistoryControlOwner, usrHistoryControlStatus,
            usrHistoryObjectVariable, usrHistoryObjectSampleType,
            usrHistoryIntervalStart, usrHistoryIntervalEnd,
            usrHistoryAbsValue, usrHistoryValStatus }
  STATUS  current
  DESCRIPTION
      "The usrHistoryGroup provides user-defined collection of
      historical information from MIB objects on the probe."
  ::= { rmon2MIBGroups 8 }

probeInformationGroup OBJECT-GROUP

  OBJECTS { probeCapabilities,
            probeSoftwareRev, probeHardwareRev, probeDateTime }
  STATUS  current
  DESCRIPTION
      "This group describes various operating parameters of the

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      probe as well as controlling the local time of the probe."
  ::= { rmon2MIBGroups 9 }

probeConfigurationGroup OBJECT-GROUP

  OBJECTS { probeResetControl, probeDownloadFile,
            probeDownloadTFTPServer, probeDownloadAction,
            probeDownloadStatus,
            serialMode, serialProtocol, serialTimeout,
            serialModemInitString, serialModemHangUpString,
            serialModemConnectResp, serialModemNoConnectResp,
            serialDialoutTimeout, serialStatus,
            netConfigIPAddress, netConfigSubnetMask,
            netConfigStatus, netDefaultGateway,
            trapDestCommunity, trapDestProtocol, trapDestAddress,
            trapDestOwner, trapDestStatus,
            serialConnectDestIpAddress, serialConnectType,
            serialConnectDialString, serialConnectSwitchConnectSeq,
            serialConnectSwitchDisconnectSeq,
            serialConnectSwitchResetSeq,
            serialConnectOwner, serialConnectStatus }
  STATUS  current
  DESCRIPTION
      "This group controls the configuration of various operating
      parameters of the probe."
  ::= { rmon2MIBGroups 10 }

rmon1EnhancementGroup OBJECT-GROUP

  OBJECTS { historyControlDroppedFrames, hostControlDroppedFrames,
            hostControlCreateTime, matrixControlDroppedFrames,
            matrixControlCreateTime, channelDroppedFrames,
            channelCreateTime, filterProtocolDirDataLocalIndex,
            filterProtocolDirLocalIndex }
  STATUS  current
  DESCRIPTION
      "This group adds some enhancements to RMON-1 that help
      management stations."
  ::= { rmon2MIBGroups 11 }

rmon1EthernetEnhancementGroup OBJECT-GROUP

  OBJECTS { etherStatsDroppedFrames, etherStatsCreateTime }
  STATUS  current
  DESCRIPTION
      "This group adds some enhancements to RMON-1 that help
      management stations."
  ::= { rmon2MIBGroups 12 }

rmon1TokenRingEnhancementGroup OBJECT-GROUP

  OBJECTS { tokenRingMLStatsDroppedFrames,

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            tokenRingMLStatsCreateTime,
            tokenRingPStatsDroppedFrames, tokenRingPStatsCreateTime,
            ringStationControlDroppedFrames,
            ringStationControlCreateTime,
            sourceRoutingStatsDroppedFrames,
            sourceRoutingStatsCreateTime }
  STATUS  current
  DESCRIPTION
      "This group adds some enhancements to RMON-1 that help
      management stations."
  ::= { rmon2MIBGroups 13 }

END

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7. Security Considerations

 In order to implement this MIB, a probe must capture all packets on
 the locally-attached network, including packets between third
 parties.  These packets are analyzed to collect network addresses,
 protocol usage information, and conversation statistics. Data of this
 nature may be considered sensitive in some environments. In such
 environments the administrator may wish to restrict SNMP access to
 the probe.
 A probe implementing this MIB is likely to also implement RMON
 [RFC1757], which includes functions for returning the contents of
 captured packets, potentially including sensitive user data or
 passwords. It is recommended that SNMP access to these functions be
 restricted.

Waldbusser Standards Track [Page 122] RFC 2021 Remote Network Monitoring MIB January 1997

8. Appendix - TimeFilter Implementation Notes

 1) Theory of Operation
 The TimeFilter mechanism allows an NMS to reduce the number of SNMP
 transactions required for a 'table-update' operation.  Polling of
 tables that incorporate a 'TimeFilter' INDEX can be reduced to a
 theoretical minimum (if used correctly). It can be easily implemented
 by an agent in a way independent of the number of NMS applications
 using the same time-filtered table.
 Although the name 'TimeFilter' may imply that a history of change
 events is maintained by the agent, this is not the case.  A time-
 filtered-value represents the current value of the object instance,
 not the 'saved' value at the time indicated by the TimeFilter INDEX
 value. Note that TimeFilter objects only appear in INDEX clauses
 (always not-accessible), so their value is never retrieved. By
 design, the actual value of a TimeFilter instance is not in itself
 meaningful (it's not a 'last-change-timestamp').
 The TimeFilter is a boolean filtering function applied in internal
 Get* PDU processing. If the 'last-change-time' of the specified
 instance is less than the particular TimeFilter INDEX value, then the
 instance is considered 'not-present' (skipped for GetNext and GetBulk
 PDUs; 'noSuchInstance' or returned to the requester.

1.1) Agent Implementation of a Time-Filtered Table

 In implementation, the time-filtered rows (one for each tick of
 sysUpTime) are only conceptual. The agent simply filters a real table
 based on:
     * the current value of sysUpTime
     * the TimeFilter value passed in the varbind
     * the last-update timestamp of each requested counter
       (agent implementation requirement)
 For example, to implement a time-filtered counter, an agent maintains
 a timestamp in a 32-bit storage location, initialized to zero. This
 is in addition to whatever instrumentation is needed for the counter.
 Each time the counter is updated, the current value of sysUpTime is
 recorded in the associated timestamp. If this is not possible or
 practical, then a background polling process must 'refresh' the
 timestamp by sampling counter values and comparing them to recorded
 samples. The timestamp update must occur within 5 seconds of the
 actual change event.

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 When an agent receives a Get, GetNext, or GetBulk PDU requesting a
 time-filtered instance, the following agent has determined that the
 instance is within the MIB view indicated by the community string in
 the PDU.
     /* return TRUE if the object is present */
     boolean time_filter_test (
         TimeFilter  last_modified_timestamp,
         TimeFilter  index_value_in_pdu )
     {
         if (last_modified_timestamp < index_value_in_pdu)
          return FALSE;
         else
             return TRUE;
     }
 The agent applies this function regardless of the lastActivationTime
 of the conceptual row in question. In other words, counter
 discontinuities are ignored (i.e.  conceptual row deleted and then
 re-created later). An agent should consider a object instance
 'changed' when it is created (either at restart time for scalars and
 static objects, or row-creation-time for dynamic tables).
 Note that using a timeFilter INDEX value of zero removes the
 filtering functionality, as the instance will always be

1.2) NMS Implementation of a Time-Filtered Table

 The particular TimeFilter INDEX values used by an NMS reflect the
 polling interval of the NMS, relative to the particular agent's
 notion of sysUpTime.
 An NMS needs to maintain one timestamp variable per agent
 (initialized to zero) for an arbitrary group of time-filtered MIB
 objects that are gathered together in the same PDU.  Each time the
 Get* PDU is sent, a request for sysUpTime is included. The retrieved
 sysUpTime value is used as the timeFilter value in the next polling
 cycle. If a polling sweep of a time-filtered group of objects
 requires more than one SNMP transaction, then the sysUpTime value
 retrieved in the first GetResponse PDU of the polling sweep is saved
 as the next timeFilter value.
 The actual last-update time of a given object is not indicated in the
 returned GetResponse instance identifier, but rather the timeFilter
 value passed in the Get*Request PDU is returned.

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 A "time-filtered get-next/bulk-sweep", done once per polling
 cycle, is a series of GetNext or GetBulk transactions, and is
 over when one of the following events occurs:
   1) the TimeFilter index value returned in the GetResponse is
      different than the TimeFilter index value passed in the
      GetNext or GetBulk request. Counter values will still be
      returned beyond this point (until the last-change-time is
      reached), but most likely the same values will be
 returned.
   2) the return PDU includes instances lexigraphically greater
      than the objects expected (i.e. same GetNext semantics as
      if the TimeFilter wasn't there)
   3) a noSuchName or other exception/error is returned.
 Note that the use of a time-filtered table in combination with a
 GetRequest PDU neutralizes any optimization that otherwise might be
 achieved with the TimeFilter, because no PDU transactions are saved.
 Either the current time-filtered object-value is returned, or a
 'noSuchInstance' exception (SNMPv1c) or 'noSuchName' error (SNMPv1)
 is returned.
 If GetBulk PDUs are used, then the value selected for response PDUs
 generated by the agent, since duplicate entries (one per size. An

appropriate of conceptual rows in the time-filtered table if known, or

 equal to the number of instances expected to fit in a GetResponse PDU
 without causing a 'tooBig' error from the agent.

2) TimeFilter Example

 The following example demonstrates how an NMS and Agent might use a
 table with a TimeFilter object in the INDEX. A static table is
 assumed to keep the example simple, but dynamic tables can also be
 supported.

2.1) General Assumptions

 fooEntry INDEX { fooTimeMark, fooIfIndex }
 FooEntry = SEQUENCE {
     fooTimeMark    TimeFilter,
     fooIfIndex     Integer32,
     fooCounts      Counter32
 }
 The NMS polls the fooTable every 15 seconds and the

baseline

 poll occurs when the agent has been up for 6 seconds,
 and the NMS has been up for 10 seconds.

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 There are 2 static rows in this table at system

initialization

 (fooCounts.0.1 and fooCounts.0.2).
 Row 1 was updated as follows:
     SysUpTime    fooCounts.*.1 value         500

1 900 2

        2300            3
 Row 2 was updated as follows:
     SysUpTime    fooCounts.*.2 value
        1100            1
        1400            2

2.2) SNMP Transactions from NMS Perspective

 Time nms-1000:
     # NMS baseline poll -- get everything since last agent

restart

     # TimeFilter == 0
     get-bulk(nonRptrs=1, maxReps=2, sysUpTime.0,
          fooCounts.0);
     returns:
        sysUpTime.0 == 600
        fooCounts.0.1 == 1  # incremented at time 500

fooCounts.0.2 == 0 # visible since created at time 0

 Time nms-2500:
     # NMS 1st poll
     # TimeFilter index == 600
     get-bulk(nonRptrs=1, maxReps=2, sysUpTime.0,
          fooCounts.600);
     returns:
        sysUpTime.0 == 2100
        fooCounts.600.1 == 2   # incremented at time 900
     fooCounts.600.2 == 2   # incremented at times 1100 and

1400

        fooCounts.601.1 == 2   # indicates end of sweep

Waldbusser Standards Track [Page 126] RFC 2021 Remote Network Monitoring MIB January 1997

 Time nms-4000:
     # NMS 2nd poll
     # TimeFilter == 2100
     get-bulk(nonRptrs=1, maxReps=2, sysUpTime.0,
          fooCounts.2100);
     returns:
         sysUpTime.0 == 3600
         fooCounts.2100.1 == 3  # incremented at time 2300
         fooCounts.2102.1 == 3  # indicates end-of-sweep
     # the counter value for row 2 is not returned because
     # it hasn't changed since sysUpTime == 2100.
     # The next timetick value for row 1 is returned instead
 Time nms-5500:
     # NMS 3rd poll
     # TimeFilter == 3600
     get-bulk(nonRptrs=1, maxReps=2, sysUpTime.0,
           fooCounts.3600);
     returns:
         sysUpTime.0 == 5100
         some-instance-outside-the-fooTable == <don't care>
         some-instance-outside-the-fooTable == <don't care>
     # no 'fooTable' counter values at all are returned

because

     # neither counter has been updated since sysUpTime ==

3600

2.3) Transactions and TimeFilter Maintenance: Agent Perspective

 Time agt-0:
     # initialize fooTable
     fooCounts.1 = 0; changed.1 = 0;
     fooCounts.2 = 0; changed.2 = 0;
 Time agt-500:
     # increment fooCounts.1
     ++fooCounts.1; changed.1 = 500;

Waldbusser Standards Track [Page 127] RFC 2021 Remote Network Monitoring MIB January 1997

 Time agt-600
     # answer get-bulk
     #   get-bulk(nonRptrs=1, maxReps=2, sysUpTime.0,
     #       fooCounts.0);
     # (changed >= 0)
     # return both counters
 Time agt-900:
     # increment fooCounts.1
     ++fooCounts.1; changed.1 = 900;
 Time agt-1100:
     # increment fooCounts.2
     ++fooCounts.2; changed.2 = 1100;
 Time agt-1400:
     # increment fooCounts.2
     ++fooCounts.2; changed.2 = 1400;
 Time agt-2100
     # answer get-bulk
     # get-bulk(nonRptrs=1, maxReps=2, sysUpTime.0,
     #     fooCounts.600);
     # (changed >= 600)
     # return both counters
 Time agt-2300:
     # increment fooCounts.1
     ++fooCounts.1; changed.1 = 2300;
 Time agt-3600:
     # answer get-bulk
     # get-bulk(nonRptrs=1, maxReps=2, sysUpTime.0,
     #     fooCounts.2100);
     # (changed >= 2100)
     # return only fooCounts.1 from the fooTable--twice
 Time agt-5100:
     # answer get-bulk
     # get-bulk(nonRptrs=1, maxReps=2, sysUpTime.0,
     #      fooCounts.3600);
     # (changed >= 3600)
     # return lexigraphically-next two MIB instances

Waldbusser Standards Track [Page 128] RFC 2021 Remote Network Monitoring MIB January 1997

9. Acknowledgments

 This document was produced by the IETF Remote Network Monitoring
 Working Group.

10. References

[1] SNMPv2 Working Group, J. Case, K. McCloghrie, M. Rose, S.

   Waldbusser, "Structure and Identification of Management
   Information for Version 2 of the Simple Network
   Management Protocol (SNMPv2)" RFC 1902, January 1996.

[2] SNMPv2 Working Group, J. Case, K. McCloghrie, M. Rose, S.

   Waldbusser, "Textual Conventions for Version 2 of the
   Simple Network Management Protocol (SNMPv2)", RFC 1903
   January 1996.

[3] McCloghrie, K., and M. Rose, "Management Information Base

   for Network Management of TCP/IP-based internets: MIB-II",
   STD 17, RFC 1213, March 1991.

[4] SNMPv2 Working Group, J. Case, K. McCloghrie, M. Rose, S.

   Waldbusser, "Protocol Operations for version 2 of the
   Simple Network Management Protocol (SNMPv2)",
   RFC 1905, January 1996.

[5] McCloghrie, K., and F. Kastenholz, "Evolution of the

   Interfaces Group of MIB-II", RFC 1573, January 1994.

[6] Information processing systems – Open Systems

   Interconnection -- Specification of Abstract Syntax
   Notation One (ASN.1), International Organization for
   Standardization.  International Standard 8824, (December,
   1987).

[7] Information processing systems – Open Systems

   Interconnection -- Specification of Basic Encoding Rules
   for Abstract Notation One (ASN.1), International
   Organization for Standardization.  International Standard
   8825, (December, 1987).

[8] Rose, M., Editor, "A Convention for Defining Traps for

   use with the SNMP", RFC 1215, March 1991.

[9] Waldbusser, S., "Remote Network Monitoring Management

   Information Base", RFC 1757, February 1995.

Waldbusser Standards Track [Page 129] RFC 2021 Remote Network Monitoring MIB January 1997

[10] Waldbusser, S., "Token Ring Extensions to the Remote Network

   Monitoring MIB", RFC 1513, September 1993.

11. Author's Address

 Steven Waldbusser
 International Network Services
 Phone: (415) 254-4251
 EMail: waldbusser@ins.com

Waldbusser Standards Track [Page 130]

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