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Network Working Group J. Hilgeman, Chair Request for Comments: 1747 Apertus Technologies, Inc. Category: Standards Track S. Nix

                                                        Metaplex, Inc.
                                                             A. Bartky
                                                   Sync Research, Inc.
                                                      W. Clark, Editor
                                                   cisco Systems, Inc.
                                                          January 1995
  Definitions of Managed Objects for SNA Data Link Control (SDLC)
                            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 specification defines an extension to the Management Information
 Base (MIB) for use with SNMP-based network management.  In
 particular, it defines objects for managing the configuration,
 monitoring and control of data link controls in an SNA environment.
 This draft identifies managed objects for SNA Synchronous Data Link
 Control (SDLC) links only.

Table of Contents

 1.     The SNMPv2 Network Management Framework  .................  2
 1.1      Object Definitions  ....................................  2
 2.     Overview  ................................................  2
 2.1      Tables Defined in the SNADLC SDLC MIB  .................  3
 2.2      Row Creation Mechanism  ................................  3
 2.3      Relationship to the Interfaces Group  ..................  4
 3.     Definitions  .............................................  7
 3.1      Port Administrative Table  .............................  9
 3.2      Port Operational Table  ...............................  14
 3.3      Port Statistics Table  ................................  20
 3.4      Link Station Administrative Table  ....................  26
 3.5      Link Station Operational Table  .......................  35
 3.6      Link Station Statistics Table  ........................  44
 3.7      Trap Definitions  .....................................  56
 3.8      Compliance Statements  ................................  57

Hilgeman, Nix, Bartky & Clark [Page 1] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

 4.     Acknowledgments  ........................................  65
 5.     References  .............................................  65
 6.     Glossary  ...............................................  66
 7.     Security Considerations  ................................  67
 8.     Authors' Addresses  .....................................  67

1. The SNMPv2 Network Management Framework

 The SNMPv2 Network Management Framework consists of four major
 components.  They are:
    o    RFC 1441 which defines the SMI, the mechanisms used for
         describing and naming objects for the purpose of management.
    o    STD 17, RFC 1213 defines MIB-II, the core set of managed
         objects for the Internet suite of protocols.
    o    RFC 1445 which defines the administrative and other
         architectural aspects of the framework.
    o    RFC 1448 which defines the protocol used for network access
         to managed objects.
 The Framework permits new objects to be defined for the purpose of
 experimentation and evaluation.

1.1. Object Definitions

 Managed objects are accessed via a virtual information store, termed
 the Management Information Base or MIB.  Objects in the MIB are
 defined using the subset of Abstract Syntax Notation One (ASN.1)
 defined in the SMI.  In particular, each object object type is named
 by an OBJECT IDENTIFIER, an administratively assigned name.  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 descriptor, to
 refer to the object type.

2. Overview

 This memo identifies the proposed set of objects for configuring,
 monitoring, and controlling SDLC ports and link stations.

Hilgeman, Nix, Bartky & Clark [Page 2] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

2.1. Tables Defined in the SNADLC SDLC MIB

 The SNADLC MIB is composed of two managed entities with three tables
 each.  The two managed entities for SDLC are:
   o    Ports: the physical connection, and
   o    Link Stations: the logical connections on the Port.
 The three management tables are:
   o    Adminstration: objects used for configuring and controlling
        the operation of a Port or Link Station,
   o    Operational: objects that reflect the run-time state of the
        Port or Link Station, and
   o    Statistics: objects that reflect the operating metrics of the
        Port or Link Station.
 Considering the above combinations, the following are the actual
 tables found in this MIB:
   1)   Port Administration Table,
   2)   Port Operation Table,
   3)   Port Statistics Table,
   4)   Link Station Administration Table,
   5)   Link Station Operation Table,
   6)   Link Station Statistics Table.
 All variables in this MIB relate to SDLC ports and link stations
 only.  Any variable relating to higher-layer entities in SNA such as
 Physical Units (PU) and Logical Units (LU) are found in the SNA NAU
 MIB [4].

2.2. Row Creation Mechanism

 Row creation mechanism for the sdlcLSAdminTable is based on the use
 of the RowStatus object.  It follows the rules for the use in SNMPv1
 context proposed in the memo "Row creation with SNMPv1" [5].  Before
 accepting the destroy value for an entry, an agent has to verify the
 operational state of the corresponding entry in the sdlcLSOperTable
 entry.

Hilgeman, Nix, Bartky & Clark [Page 3] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

2.3. Relationship to the Interfaces Group

 This memo shall conform to the recommendations of [6].
 The SDLC layer of each SDLC Port shall be modeled by a row in the
 ifTable with an ifType using the IANA assigned number for SDLC (17).
 Each SDLC port interface must comply with the following conformance
 groups in [6]:
  1. ifGeneralGroup
  2. ifStackGroup
  3. ifPacketGroup
 An implementation may optionally comply with the ifTestGroup defined
 in that memo to execute vendor specific tests.  An example of this
 would be to perform LPDA test functions.
 The SDLC port's relation with its physical, or lower-layer interface
 (i.e., RS-232, V.35, etc.) shall be modeled by a row in the
 ifStackTable with the ifStackHigherLayer pointing to the SDLC port
 ifTable instance and the ifStackLowerLayer pointing to the physical
 media-specific ifTable instance.  The media-specific objects of these
 lower-layer interfaces will, of course, be described in their
 respective MIBs (i.e., [1]).
 The following table provides specific implementation guidelines for
 all the interface group objects listed in the conformance tables
 above.

Object Use for an SDLC Port

ifIndex Each SDLC port is represented by an ifEntry. All

                  SDLC port tables shall be indexed by ifIndex.

ifDescr Description of the SDLC port.

ifType The IANA value reserved for SDLC - 17.

ifMtu Refer to [6].

ifSpeed This object shall reflect the value of the

                  corresponding object in the ifEntry of the
                  associated lower-layer interface.

ifPhysAddress A string denoting the physical location of the SDLC

                  port within its node.  This shall have unique
                  significance within each implementing node.

Hilgeman, Nix, Bartky & Clark [Page 4] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

ifAdminStatus This object shall reflect the value of the

                  corresponding object in the ifEntry of the
                  associated lower-layer interface.

ifOperStatus This object shall reflect the value of the

                  corresponding object in the ifEntry of the
                  associated lower-layer interface.

ifLastChange Refer to [6].

ifInOctets Refer to [6].

ifInUcastPkts This object shall count packets received from a

                  specific SDLC poll address.  Packets for the SDLC
                  broadcast address of x'FF' are not counted.

ifInDiscards Refer to [6].

ifInErrors Refer to [6]. Specific counters for these errors

                  are kept in the sdlcPortStatsTable.

ifInUnknownProtos This counter shall return zero for SDLC ports.

ifOutOctets Refer to [6].

ifOutUcastPkts This object shall count packets transmitted to a

                  specific SDLC poll address (not x'FF').

ifOutDiscards Refer to [6].

ifOutErrors Refer to [6]. Specific counters for these errors

                  are kept in the sdlcPortStatsTable.

ifName The textual name of the SDLC port or an octet string

                  of zero length.

ifInMulticastPkts The value is 0 (not applicable to the SDLC layer).

ifInBroadcastPkts This object shall count packets received on this

                  interface addressed to the SDLC broadcast address
                  (x'FF').  Only point-to-point ports supporting a
                  secondary switched station should return non-zero
                  values.

ifOutMulticastPkts The value is 0 (not applicable to the SDLC layer).

ifOutBroadcastPkts This object shall count packets transmitted on this

                  interface which were addressed to the SDLC broadcast

Hilgeman, Nix, Bartky & Clark [Page 5] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                  address (x'FF').  Only point-to-point ports
                  supporting a primary switched station should
                  return non-zero values.

ifHC* Not part of the conformance group.

ifLinkUpDownTrapEnable

                  Refer to [6].  Default is disabled (2).

ifHighSpeed Refer to [6].

ifPromiscuousMode Should return false if this interface receives only

                  packets addressed to its SDLC poll address(es).
                  However, in certain implementations, the lower-layer
                  interface shall present all frames to the SDLC port
                  regardless of the poll address.  Such frames may be
                  the result of a misconfigured peer or the secondary
                  end of a multipoint connection.  Such
                  implementations should return true for this
                  object.

ifConnectorPresent Set to 'false'.

ifStackHigherLayer For each SDLC port there will be an ifStackEntry

                  with this object's value referring to the ifIndex of
                  the SDLC port's ifEntry for the SDLC layer.

ifStackLowerLayer For each SDLC port there will be an ifStackEntry

                  with this object's value referring to the ifIndex of
                  the physical layer interface's ifEntry for that SDLC
                  port.

ifStackStatus Refer to [6].

Hilgeman, Nix, Bartky & Clark [Page 6] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

3. Definitions

SNA-SDLC-MIB DEFINITIONS ::= BEGIN

IMPORTS

  MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,
  Counter32, Integer32, TimeTicks
      FROM SNMPv2-SMI
  DisplayString, RowStatus, TimeInterval
      FROM SNMPv2-TC
  MODULE-COMPLIANCE, OBJECT-GROUP
      FROM SNMPv2-CONF
  mib-2, ifIndex, ifAdminStatus, ifOperStatus
      FROM RFC1213-MIB;

snaDLC MODULE-IDENTITY

      LAST-UPDATED  "9411150000Z"
      ORGANIZATION  "IETF SNA DLC MIB Working Group"
      CONTACT-INFO
              "        Wayne Clark
               Postal: cisco Systems, Inc.
                       3100 Smoketree Ct.
                       Suite 1000
                       Raleigh, NC 27604
                       US
                  Tel: +1 919 878 6958
               E-Mail: wclark@cisco.com"
      DESCRIPTION
              "This is the MIB module for objects used to
               manage SDLC devices."

::= { mib-2 41 }

– – The following data link controls are modelled in this MIB module: – – 1. SDLC –

sdlc OBJECT IDENTIFIER ::= { snaDLC 1 }

Hilgeman, Nix, Bartky & Clark [Page 7] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

– – THE SDLC GROUP

– – The following resources are modelled in the SDLC group of this – MIB module: – – 1. PORTS – 2. LINK STATIONS

sdlcPortGroup OBJECT IDENTIFIER ::= { sdlc 1 } – Physical Ports sdlcLSGroup OBJECT IDENTIFIER ::= { sdlc 2 } – Logical Link Stations

– – THE SDLC PORT GROUP

– – The following classes of information is modelled for each SDLC port: – – 1. ADMINISTRATIVE ( read/write) – 2. OPERATIONAL ( read-only) – 3. STATISTICS ( read-only)

– Information not found in this group is found in tables described in – the following RFCs: – – 1. RFC1213 - MIB-II – – TABLE INDEX –

– a. ifTable ifIndex – – 2. RFC1659 - The RS232-like MIB – – TABLE INDEX –

– a. rs232PortTable rs232PortIndex – b. rs232SyncPortTable rs232SyncPortIndex – c. rs232InSigTable rs232InSigPortIndex, – rs232InSigName – d. rs232OutSigTable rs232OutSigPortIndex, – rs232OutSigName – e. rs232AsyncPortTable rs232AsyncPortIndex – – rs232AsyncPortTable for ISO 3309.3 ( Start-Stop SDLC).

Hilgeman, Nix, Bartky & Clark [Page 8] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

* – * * – * THE SDLC PORT ADMINISTRATIVE TABLE * – * * – *

sdlcPortAdminTable OBJECT-TYPE

                  SYNTAX      SEQUENCE OF SdlcPortAdminEntry
                  MAX-ACCESS  not-accessible
                  STATUS      current
                  DESCRIPTION
                      "This table contains objects that can be
                      changed to manage an SDLC port.    Changing one
                      of these parameters may take effect in the
                      operating port immediately or may wait until
                      the interface is restarted depending on the
                      details of the implementation.
                      Most of the objects in this read-write table
                      have corresponding read-only objects in the
                      sdlcPortOperTable that return the current
                      operating value.
                      The operating values may be different from
                      these configured values if  a configured
                      parameter was changed after the interface was
                      started."
                   ::= { sdlcPortGroup 1 }

sdlcPortAdminEntry OBJECT-TYPE

                  SYNTAX      SdlcPortAdminEntry
                  MAX-ACCESS  not-accessible
                  STATUS      current
                  DESCRIPTION
                      "A list of configured values for an SDLC port."
                  INDEX   { ifIndex }
                  ::= { sdlcPortAdminTable 1 }

SdlcPortAdminEntry ::= SEQUENCE {

      sdlcPortAdminName           DisplayString,
      sdlcPortAdminRole           INTEGER,
      sdlcPortAdminType           INTEGER,
      sdlcPortAdminTopology       INTEGER,
      sdlcPortAdminISTATUS        INTEGER,
      sdlcPortAdminACTIVTO        TimeInterval,
      sdlcPortAdminPAUSE          TimeInterval,
      sdlcPortAdminSERVLIM        Integer32,

Hilgeman, Nix, Bartky & Clark [Page 9] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

      sdlcPortAdminSlowPollTimer  TimeInterval

}

sdlcPortAdminName OBJECT-TYPE

                  SYNTAX      DisplayString (SIZE (1..10))
                  MAX-ACCESS  read-write
                  STATUS      current
                  DESCRIPTION
                      "An octet string that defines the physical port
                      to which this interface is assigned.  It has
                      implementation-specific significance. Its value
                      shall be unique within the administered
                      system.  It must contain only ASCII printable
                      characters.  Should an implementation choose to
                      accept a write operation  for this object, it
                      causes the logical port definition associated
                      with the table instance to be moved to  a
                      different physical port.  A write operation
                      shall not take effect until the port is cycled
                      inactive."
                  ::= { sdlcPortAdminEntry 1 }

sdlcPortAdminRole OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                      primary(1),
                      secondary(2),
                      negotiable(3)
                  }
                  MAX-ACCESS  read-write
                  STATUS      current
                  DESCRIPTION
                      "This object describes the role that the link
                      station shall assume the next time a connection
                      is established.
                      Even though this is defined as a port object,
                      it is a link station attribute in the sense
                      that a role is per link station.  However, it
                      is not possible to vary link station roles on a
                      particular port.  For example, if an SDLC port
                      is configured to primary, all link stations on
                      that port must be primary."
                  ::= { sdlcPortAdminEntry 2 }

sdlcPortAdminType OBJECT-TYPE

                  SYNTAX      INTEGER
                  {

Hilgeman, Nix, Bartky & Clark [Page 10] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                       leased(1),
                       switched(2)
                  }
                  MAX-ACCESS  read-write
                  STATUS      current
                  DESCRIPTION
                      "This parameter defines whether the SDLC port
                      is to connect to a leased or switched line.  A
                      write operation to this administrative  value
                      shall not take effect until the SDLC port has
                      been cycled inactive."
                  DEFVAL { leased }
                  ::= { sdlcPortAdminEntry 3 }

sdlcPortAdminTopology OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                       pointToPoint(1),
                       multipoint(2)
                  }
                  MAX-ACCESS  read-write
                  STATUS      current
                  DESCRIPTION
                      "This parameter defines whether the SDLC port is
                      capable of operating in either a point-to-point
                      or multipoint topology.
                      sdlcPortAdminTopology == multipoint implies the
                      port can also operate in a point-to-point
                      topology.  sdlcPortAdminTopology ==
                      pointToPoint does not imply the port can
                      operate in a multipoint topology.
                      A write operation to this administrative value
                      shall not take effect until the SDLC port has
                      been cycled inactive."
                  DEFVAL { pointToPoint }
                  ::= { sdlcPortAdminEntry 4 }

sdlcPortAdminISTATUS OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                       inactive(1),
                       active(2)
                  }
                  MAX-ACCESS  read-write
                  STATUS      current
                  DESCRIPTION

Hilgeman, Nix, Bartky & Clark [Page 11] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      "This parameter controls the initial value of
                      the administrative status, ifAdminStatus, of
                      this SDLC port at port start-up.  Depending
                      on the implementation, a write operation to
                      this administrative object may not take effect
                      until the SDLC port has been cycled inactive."
                  DEFVAL { active }
                  ::= { sdlcPortAdminEntry 5 }

sdlcPortAdminACTIVTO OBJECT-TYPE

                  SYNTAX      TimeInterval
                  MAX-ACCESS  read-write
                  STATUS      current
                  DESCRIPTION
                      "This parameter defines the period of time (in
                      1/100ths of a second) that the port will allow a
                      switched line to remain inactive before
                      disconnecting.  A switched line is considered
                      to be inactive if there are no I-Frames being
                      transferred.  A value of zero indicates no
                      timeout.  Depending on the implementation, a
                      write operation to this administered value may
                      not take effect until the port is cycled
                      inactive.
                      This object only has meaning for SDLC ports
                      where sdlcPortAdminType == switched
                      The object descriptor contains the name of an
                      NCP configuration parameter, ACTIVTO.  Please
                      note that the value of this object represents
                      1/100ths of a second while the NCP ACTIVTO is
                      represented in seconds."
                  DEFVAL { 0 }
                  ::= { sdlcPortAdminEntry 6 }

sdlcPortAdminPAUSE OBJECT-TYPE

                  SYNTAX      TimeInterval
                  MAX-ACCESS  read-write
                  STATUS      current
                  DESCRIPTION
                      "This object defines the minimum elapsed time
                      (in 1/100ths of a second) between any two
                      traversals of the poll list for a primary SDLC
                      port.  Depending on the implementation, a write
                      operation to this administered value  may not
                      take effect until the port is cycled inactive.

Hilgeman, Nix, Bartky & Clark [Page 12] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      The object descriptor contains the name of an
                      NCP configuration parameter, PAUSE.  Please
                      note that the value of this object represents
                      1/100ths of a second while the NCP PAUSE is
                      represented in 1/10ths of a second.
                      This object only has meaning for SDLC ports
                      where sdlcPortAdminRole == primary "
                  DEFVAL { 200 }
                  ::= { sdlcPortAdminEntry 7 }

sdlcPortAdminSERVLIM OBJECT-TYPE

                  SYNTAX      Integer32
                  MAX-ACCESS  read-write
                  STATUS      current
                  DESCRIPTION
                      "This object defines the number of times the
                      active poll list will be traversed before
                      polling a station on the slow poll list for a
                      primary, multipoint SDLC port.  Depending  on
                      the implementation, a write operation to this
                      administered value  may not take effect until
                      the port is cycled inactive.
                      This object only has meaning for SDLC ports
                      where
                          sdlcPortAdminRole == primary
                      and
                          sdlcPortAdminTopology == multipoint "
                  DEFVAL { 20 }
                  ::= { sdlcPortAdminEntry 8 }

sdlcPortAdminSlowPollTimer OBJECT-TYPE

                  SYNTAX      TimeInterval
                  MAX-ACCESS  read-write
                  STATUS      current
                  DESCRIPTION
                      "This object describes the elapsed time (in
                      1/100ths of a second) between polls for failed
                      secondary link station addresses.  Depending
                      on the implementation, a write operation to
                      this administered value  may not take effect
                      until the port is cycled inactive.
                      This object only has meaning for SDLC ports
                      where
                          sdlcPortAdminRole == primary
                      and

Hilgeman, Nix, Bartky & Clark [Page 13] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                          sdlcPortAdminTopology == multipoint "
                  DEFVAL { 2000 }
                  ::= { sdlcPortAdminEntry 9 }

* – * * – * THE SDLC PORT OPERATIONAL TABLE * – * * – *

sdlcPortOperTable OBJECT-TYPE

                  SYNTAX      SEQUENCE OF SdlcPortOperEntry
                  MAX-ACCESS  not-accessible
                  STATUS      current
                  DESCRIPTION
                      "This table contains current SDLC port
                      parameters.  Many of these objects have
                      corresponding objects inthe sdlcPortAdminTable."
                  ::= { sdlcPortGroup 2 }

sdlcPortOperEntry OBJECT-TYPE

                  SYNTAX      SdlcPortOperEntry
                  MAX-ACCESS  not-accessible
                  STATUS      current
                  DESCRIPTION
                      "Currently set parameters for a specific SDLC
                      port."
                  INDEX   { ifIndex }
                  ::= { sdlcPortOperTable 1 }

SdlcPortOperEntry ::= SEQUENCE {

      sdlcPortOperName                DisplayString,
      sdlcPortOperRole                INTEGER,
      sdlcPortOperType                INTEGER,
      sdlcPortOperTopology            INTEGER,
      sdlcPortOperISTATUS             INTEGER,
      sdlcPortOperACTIVTO             TimeInterval,
      sdlcPortOperPAUSE               TimeInterval,
      sdlcPortOperSlowPollMethod      INTEGER,
      sdlcPortOperSERVLIM             Integer32,
      sdlcPortOperSlowPollTimer       TimeInterval,
      sdlcPortOperLastModifyTime      TimeTicks,
      sdlcPortOperLastFailTime        TimeTicks,
      sdlcPortOperLastFailCause       INTEGER

}

sdlcPortOperName OBJECT-TYPE

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                  SYNTAX      DisplayString (SIZE (1..8))
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "An octet string that describes the physical
                      port to which this interface is currently
                      attached.  It has  implementation-specific
                      significance."
                  ::= { sdlcPortOperEntry 1 }

sdlcPortOperRole OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                      primary(1),
                      secondary(2),
                      undefined(3)
                  }
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object describes the role that the link
                      station has assumed on this connection.
                      Even though this is defined as a port object,
                      it is a link station attribute in the sense
                      that a role is per link station.  However, it
                      is not possible to vary link station roles on a
                      particular port.  For example, if an SDLC port
                      is configured to primary, all link stations on
                      that port must be primary.
                      The value of sdlcPortOperRole is undefined(3)
                      whenever the link station role has not yet been
                      established by the mode setting command."
                  ::= { sdlcPortOperEntry 2 }

sdlcPortOperType OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                       leased(1),
                       switched(2)
                  }
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This parameter defines whether the SDLC port
                      is currently operating as though connected to a
                      leased or switched line."

Hilgeman, Nix, Bartky & Clark [Page 15] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                  ::= { sdlcPortOperEntry 3 }

sdlcPortOperTopology OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                       pointToPoint(1),
                       multipoint(2)
                  }
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This parameter defines whether the SDLC port is
                      currently operating in a point-to-point or
                      multipoint topology."
                  ::= { sdlcPortOperEntry 4 }

sdlcPortOperISTATUS OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                       inactive(1),
                       active(2)
                  }
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This parameter describes the initial value of
                      the administrative status, ifAdminStatus, of
                      this SDLC port at last port start-up."
                  ::= { sdlcPortOperEntry 5 }

sdlcPortOperACTIVTO OBJECT-TYPE

                  SYNTAX      TimeInterval
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This parameter defines the period of time (in
                      100ths of a second) that the port will allow a
                      switched line to remain inactive before
                      disconnecting.  A switched line is considered
                      to be inactive if there are no I-Frames being
                      transferred.
                      The object descriptor contains the name of an
                      NCP configuration parameter, ACTIVTO.  Please
                      note that the value of this object represents
                      1/100ths of a second while the NCP ACTIVTO is
                      represented in seconds.

Hilgeman, Nix, Bartky & Clark [Page 16] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      A value of zero indicates no timeout."
                  ::= { sdlcPortOperEntry 6 }

sdlcPortOperPAUSE OBJECT-TYPE

                  SYNTAX      TimeInterval
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object describes the current minimum
                      elapsed time (in 1/100ths of a second) between
                      any two traversals of the poll list for a
                      primary SDLC port.
                      The object descriptor contains the name of an
                      NCP configuration parameter, PAUSE.  Please
                      note that the value of this object represents
                      1/100ths of a second while the NCP PAUSE is
                      represented in 1/10ths of a second.
                      This object only has meaning for SDLC ports
                      where
                          sdlcPortAdminRole == primary "
                  ::= { sdlcPortOperEntry 7 }

sdlcPortOperSlowPollMethod OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                       servlim(1),
                       pollpause(2),
                       other(3)
                  }
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object defines the exact method that is in
                      effect for periodically polling failed secondary
                      link station addresses.
                      If sdlcPortOperSlowPollMethod == servlim, then
                      sdlcPortOperSERVLIM defines the actual polling
                      characteristics.
                      If sdlcPortOperSlowPollMethod == pollpause,
                      then sdlcPortOperSlowPollTimer defines the
                      actual polling characteristics.
                      If sdlcPortOperSlowPollMethod == other, then
                      the polling characteristics are modeled in

Hilgeman, Nix, Bartky & Clark [Page 17] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      vendor-specific objects.
                      This object only has meaning for SDLC ports
                      where
                          sdlcPortOperRole == primary
                      and
                          sdlcPortOperTopology == multipoint "
                  ::= { sdlcPortOperEntry 8 }

sdlcPortOperSERVLIM OBJECT-TYPE

                  SYNTAX      Integer32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object describes the number of times the
                      active poll list is currently being traversed
                      before polling a station on the slow poll list
                      for a primary, multipoint SDLC port.
                      This object only has meaning for SDLC ports
                      where
                          sdlcPortOperRole == primary
                      and
                          sdlcPortOperTopology == multipoint "
                  ::= { sdlcPortOperEntry 9 }

sdlcPortOperSlowPollTimer OBJECT-TYPE

                  SYNTAX      TimeInterval
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object describes the elapsed time (in
                      1/100ths of a second) between polls for failed
                      secondary link station addresses.
                      This object only has meaning for SDLC ports
                      where
                          sdlcPortOperRole == primary
                      and
                          sdlcPortOperTopology == multipoint "
                  ::= { sdlcPortOperEntry 10 }

sdlcPortOperLastModifyTime OBJECT-TYPE

                  SYNTAX      TimeTicks
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object describes the value of sysUpTime

Hilgeman, Nix, Bartky & Clark [Page 18] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                       when this port definition was last modified.
                       If the port has not been modified, then this
                       value shall be zero."
                  ::= { sdlcPortOperEntry 11 }

sdlcPortOperLastFailTime OBJECT-TYPE

                  SYNTAX      TimeTicks
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object describes the value of sysUpTime
                      when this SDLC port last failed.  If the port
                      has not failed, then this value shall be zero."
                  ::= { sdlcPortOperEntry 12 }

sdlcPortOperLastFailCause OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                      undefined(1),
                      physical(2)
                  }
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This enumerated object describes the cause of
                      the last failure of this SDLC port.  If the
                      port has not failed, then this object has a
                      value of undefined(1)."
                  DEFVAL { undefined }
                  ::= { sdlcPortOperEntry 13 }

Hilgeman, Nix, Bartky & Clark [Page 19] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

* – * * – * THE SDLC PORT STATISTICS TABLE * – * * – *

sdlcPortStatsTable OBJECT-TYPE

                  SYNTAX      SEQUENCE OF SdlcPortStatsEntry
                  MAX-ACCESS  not-accessible
                  STATUS      current
                  DESCRIPTION
                      "Each entry in this table contains statistics
                      for a specific SDLC port."
                   ::= { sdlcPortGroup 3 }

sdlcPortStatsEntry OBJECT-TYPE

                  SYNTAX      SdlcPortStatsEntry
                  MAX-ACCESS  not-accessible
                  STATUS      current
                  DESCRIPTION
                      "A list of statistics for an SDLC port."
                  INDEX   { ifIndex }
                  ::= { sdlcPortStatsTable 1 }

SdlcPortStatsEntry ::= SEQUENCE {

      sdlcPortStatsPhysicalFailures Counter32,
      sdlcPortStatsInvalidAddresses Counter32,
      sdlcPortStatsDwarfFrames      Counter32,
      sdlcPortStatsPollsIn          Counter32,
      sdlcPortStatsPollsOut         Counter32,
      sdlcPortStatsPollRspsIn       Counter32,
      sdlcPortStatsPollRspsOut      Counter32,
      sdlcPortStatsLocalBusies      Counter32,
      sdlcPortStatsRemoteBusies     Counter32,
      sdlcPortStatsIFramesIn        Counter32,
      sdlcPortStatsIFramesOut       Counter32,
      sdlcPortStatsOctetsIn         Counter32,
      sdlcPortStatsOctetsOut        Counter32,
      sdlcPortStatsProtocolErrs     Counter32,
      sdlcPortStatsActivityTOs      Counter32,
      sdlcPortStatsRNRLIMITs        Counter32,
      sdlcPortStatsRetriesExps      Counter32,
      sdlcPortStatsRetransmitsIn    Counter32,
      sdlcPortStatsRetransmitsOut   Counter32

}

sdlcPortStatsPhysicalFailures OBJECT-TYPE

Hilgeman, Nix, Bartky & Clark [Page 20] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of times
                      this port has failed due to its physical media
                      since port startup.  At port startup time,
                      this object must be initialized to zero."
                  ::= { sdlcPortStatsEntry 1 }

sdlcPortStatsInvalidAddresses OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of
                      frames received by this port with invalid link
                      station addresses."
                  ::= { sdlcPortStatsEntry 2 }

sdlcPortStatsDwarfFrames OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of
                      frames received by this port which were
                      delivered intact by the physical layer but were
                      too short to be legal.
                      Ignoring the frame check sequence (FCS), a
                      frame is considered to be too short if it
                      is less than 2 bytes for sdlcLSOperMODULO of
                      eight, or if it is less than 3 bytes for
                      sdlcLSOperMODULO of onetwentyeight."
                  ::= { sdlcPortStatsEntry 3 }

sdlcPortStatsPollsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total number of polls
                       received by this port since the port was
                       created."
                  ::= { sdlcPortStatsEntry 4 }

Hilgeman, Nix, Bartky & Clark [Page 21] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

sdlcPortStatsPollsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total number of polls
                       sent by this port since the port was created."
                  ::= { sdlcPortStatsEntry 5 }

sdlcPortStatsPollRspsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total number of poll
                       responses received by this port since the port
                       was created."
                  ::= { sdlcPortStatsEntry 6 }

sdlcPortStatsPollRspsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total number of poll
                       responses sent by this port since the port was
                       created."
                  ::= { sdlcPortStatsEntry 7 }

sdlcPortStatsLocalBusies OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total number of
                       times that the local SDLC link stations on
                       this port have entered a busy state (RNR).
                       This object is initialized to zero when the
                       port is created."
                  ::= { sdlcPortStatsEntry 8 }

sdlcPortStatsRemoteBusies OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current

Hilgeman, Nix, Bartky & Clark [Page 22] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                  DESCRIPTION
                       "This object reflects the total number of
                       times that the adjacent (i.e., remote) SDLC
                       link stations on this port have entered a busy
                       state (RNR).  This object is initialized to
                       zero when the port is created."
                  ::= { sdlcPortStatsEntry 9 }

sdlcPortStatsIFramesIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total number of
                       I-Frames that have been received by SDLC link
                       stations on this port.  This object is
                       initialized to zero when the port is created."
                  ::= { sdlcPortStatsEntry 10 }

sdlcPortStatsIFramesOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total number of
                       I-Frames that have been transmitted by SDLC
                       link stations on this port.  This object is
                       initialized to zero when the port is created."
                  ::= { sdlcPortStatsEntry 11 }

sdlcPortStatsOctetsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total octets
                       received from adjacent SDLC link stations on
                       this port.  This object covers the address,
                       control, and information field of I-Frames
                       only.  This object is initialized to zero when
                       the port is created."
                  ::= { sdlcPortStatsEntry 12 }

sdlcPortStatsOctetsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION

Hilgeman, Nix, Bartky & Clark [Page 23] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                       "This object reflects the total octets
                       transmitted to adjacent SDLC link stations on
                       this port.  This object covers the address,
                       control, and information field of I-Frames
                       only.  This object is initialized to zero when
                       the port is created."
                  ::= { sdlcPortStatsEntry 13 }

sdlcPortStatsProtocolErrs OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total number of
                       times that the SDLC link stations on this port
                       have deactivated the link as a result of
                       having received a protocol violation from the
                       adjacent link station.  This object is
                       initialized to zero when the port is created."
                  ::= { sdlcPortStatsEntry 14 }

sdlcPortStatsActivityTOs OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total number of
                       times that the SDLC link stations on this port
                       have deactivated the link as a result of no
                       activity on the link.  This object is
                       initialized to zero when the port is created."
                  ::= { sdlcPortStatsEntry 15 }

sdlcPortStatsRNRLIMITs OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total number of
                       times that the SDLC link stations on this port
                       have deactivated the link as a result of its
                       RNRLIMIT timer expiring.  This object is
                       initialized to zero when the port is created."
                  ::= { sdlcPortStatsEntry 16 }

sdlcPortStatsRetriesExps OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only

Hilgeman, Nix, Bartky & Clark [Page 24] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total number of
                       times that the SDLC link stations on this port
                       have deactivated the link as a result of a
                       retry sequence being exhausted.  This object
                       is initialized to zero when the port is
                       created."
                  ::= { sdlcPortStatsEntry 17 }

sdlcPortStatsRetransmitsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total number of
                       I-Frames retransmitted by remote link stations
                       for all SDLC link stations on this port.  This
                       object is initialized to zero when the port is
                       created."
                  ::= { sdlcPortStatsEntry 18 }

sdlcPortStatsRetransmitsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "This object reflects the total number of
                       I-Frames retransmitted by all local SDLC link
                       stations on this port.  This object is
                       initialized to zero when the port is created."
                  ::= { sdlcPortStatsEntry 19 }

Hilgeman, Nix, Bartky & Clark [Page 25] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

– – THE SDLC LINK STATION GROUP

– The following classes of information is modelled for each SDLC link – station: – – 1. ADMINISTRATIVE ( read-write) – 2. OPERATIONAL ( read-only) – 3. STATISTICS ( read-only)

* – * * – * THE SDLC LINK STATION ADMINISTRATIVE TABLE * – * * – *

sdlcLSAdminTable OBJECT-TYPE

                  SYNTAX      SEQUENCE OF SdlcLSAdminEntry
                  MAX-ACCESS  not-accessible
                  STATUS      current
                  DESCRIPTION
                      "This table contains objects that can be
                      changed to manage an SDLC link station.
                      Changing one of these parameters may take
                      effect in the operating link immediately or may
                      wait until the link is restarted depending on
                      the details of the implementation.
                      The entries in sdlcLSAdminTable can be created
                      either by an agent or a management station. The
                      management station can create an entry in
                      sdlcLSAdminTable by setting the appropriate
                      value in sdlcLSAdminRowStatus.
                      Most of the objects in this read-create table
                      have corresponding read-only objects in the
                      sdlcLSOperTable that reflect the current
                      operating value.
                      The operating values may be different from
                      these configured values if changed by XID
                      negotiation or if a configured parameter was
                      changed after the link was started."
                  ::= { sdlcLSGroup 1 }

sdlcLSAdminEntry OBJECT-TYPE

Hilgeman, Nix, Bartky & Clark [Page 26] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                  SYNTAX      SdlcLSAdminEntry
                  MAX-ACCESS  not-accessible
                  STATUS      current
                  DESCRIPTION
                       "A list of configured values for an SDLC link
                       station."
                  INDEX   { ifIndex, sdlcLSAddress }
                  ::= { sdlcLSAdminTable 1 }

SdlcLSAdminEntry ::= SEQUENCE {

      sdlcLSAddress           INTEGER,
      sdlcLSAdminName         DisplayString,
      sdlcLSAdminState        INTEGER,
      sdlcLSAdminISTATUS      INTEGER,
      sdlcLSAdminMAXDATASend  Integer32,
      sdlcLSAdminMAXDATARcv   Integer32,
      sdlcLSAdminREPLYTO      TimeInterval,
      sdlcLSAdminMAXIN        INTEGER,
      sdlcLSAdminMAXOUT       INTEGER,
      sdlcLSAdminMODULO       INTEGER,
      sdlcLSAdminRETRIESm     INTEGER,
      sdlcLSAdminRETRIESt     TimeInterval,
      sdlcLSAdminRETRIESn     Integer32,
      sdlcLSAdminRNRLIMIT     TimeInterval,
      sdlcLSAdminDATMODE      INTEGER,
      sdlcLSAdminGPoll        INTEGER,
      sdlcLSAdminSimRim       INTEGER,
      sdlcLSAdminXmitRcvCap   INTEGER,
      sdlcLSAdminRowStatus    RowStatus

}

sdlcLSAddress OBJECT-TYPE

                  SYNTAX      INTEGER (1..255)
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                       "This value is the poll address of the
                       secondary link station for this SDLC link.  It
                       uniquely identifies the SDLC link station
                       within a single SDLC port."
                  ::= { sdlcLSAdminEntry 1 }

sdlcLSAdminName OBJECT-TYPE

                  SYNTAX      DisplayString (SIZE (1..10))
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION

Hilgeman, Nix, Bartky & Clark [Page 27] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      "An octet string that defines the local name of
                      the SDLC link station.  This field may be sent
                      in the XID3 control vector 0x0E, type 0xF7."
                  ::= { sdlcLSAdminEntry 2 }

sdlcLSAdminState OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                       inactive(1),
                       active(2)
                  }
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object controls the desired state of the
                      SDLC station.  The managed system shall attempt
                      to keep the operational state, sdlcLSOperState,
                      consistent with this value."
                  DEFVAL { active }
                  ::= { sdlcLSAdminEntry 3 }

sdlcLSAdminISTATUS OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                       inactive(1),
                       active(2)
                  }
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This parameter controls the desired state,
                      sdlcLSAdminState, of the SDLC link station at
                      link station start-up."
                  DEFVAL { active }
                  ::= { sdlcLSAdminEntry 4 }

sdlcLSAdminMAXDATASend OBJECT-TYPE

                  SYNTAX      Integer32
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object contains the maximum PDU size that
                      the local link station thinks it can send to
                      the adjacent link station before having
                      received any XID from the ALS.  After the
                      maximum PDU size that the ALS can receive is
                      known (via XID exchange) that value is
                      reflected in sdlcLSOperMAXDATASend and takes

Hilgeman, Nix, Bartky & Clark [Page 28] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      precedence over this object.
                      This value includes the Transmission Header
                      (TH) and the Request Header (RH)."
                  ::= { sdlcLSAdminEntry 5 }

sdlcLSAdminMAXDATARcv OBJECT-TYPE

                  SYNTAX      Integer32
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object contains the maximum PDU size that
                      the local link station can receive from the
                      adjacent link station.  This value is sent in
                      the XID to the ALS.
                      This value includes the Transmission Header
                      (TH) and the Request Header (RH)."
                  ::= { sdlcLSAdminEntry 6 }

sdlcLSAdminREPLYTO OBJECT-TYPE

                  SYNTAX      TimeInterval
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object controls the reply timeout (in
                      1/100ths of a second) for an SDLC link
                      station.  If the link station does not receive
                      a response to a poll or message before the
                      specified time expires then the appropriate
                      error recovery shall be initiated.
                      The object descriptor contains the name of an
                      NCP configuration parameter, REPLYTO.  Please
                      note that the value of this object represents
                      1/100ths of a second while the NCP REPLYTO is
                      represented in 1/10ths of a second.
                      Depending on the implementation, a write
                      operation to this administered value  may not
                      change the operational value, sdlcLSOperREPLYTO,
                      until the link station is cycled inactive.
                      This object only has meaning for SDLC ports
                      where sdlcPortAdminRole == primary "
                  DEFVAL { 100 }
                  ::= { sdlcLSAdminEntry 7 }

Hilgeman, Nix, Bartky & Clark [Page 29] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

sdlcLSAdminMAXIN OBJECT-TYPE

                  SYNTAX      INTEGER (1..127)
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object controls the maximum number of
                      unacknowledged I-frames which an SDLC link
                      station may receive.  This should range from 1
                      to (sdlcLSAdminMODULO - 1).  This value is sent
                      in the XID to the ALS.
                      A write operation to this administered value
                      will not change the operational value,
                      sdlcLSOperMAXIN, until the link station is
                      cycled inactive."
                  DEFVAL { 7 }
                  ::= { sdlcLSAdminEntry 8 }

sdlcLSAdminMAXOUT OBJECT-TYPE

                  SYNTAX      INTEGER (1..127)
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object controls the maximum number of
                      consecutive unacknowledged I-frames which an
                      SDLC link station shall send without an
                      acknowledgement.  This shall range from 1 to
                      (sdlcLSAdminMODULO - 1).
                      For link stations on switched SDLC lines,
                      certain implementions may choose to override
                      this administered value with the value
                      received in the XID exchange.
                      Depending on the implementation, a write
                      operation to this administered value may not
                      change the operational value,
                      sdlcLSOperMAXOUT, until the link station is
                      cycled inactive.
                      An implementation can support only modulo 8,
                      only modulo 128, or both."
                  DEFVAL { 1 }
                  ::= { sdlcLSAdminEntry 9 }

sdlcLSAdminMODULO OBJECT-TYPE

                  SYNTAX      INTEGER
                  {

Hilgeman, Nix, Bartky & Clark [Page 30] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      eight(8),
                      onetwentyeight(128)
                  }
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object controls the modulus for an SDLC
                      link station.  This modulus determines the size
                      of the rotating acknowledgement window used the
                      SDLC link station pair.
                      A write operation to this administered value
                      will not change the operational value,
                      sdlcLSOperMODULO, until the link station is
                      cycled inactive.
                      An implementation can support only modulo 8,
                      only modulo 128, or both."
                  DEFVAL { eight }
                  ::= { sdlcLSAdminEntry 10 }

sdlcLSAdminRETRIESm OBJECT-TYPE

                  SYNTAX      INTEGER (0..128)
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object controls number of retries in a
                      retry sequence for the local SDLC link
                      station.  A retry sequence is a series of
                      retransmitted frames ( data or control) for
                      which no positive acknowledgement is received.
                      The number of times that the retry sequence is
                      to be repeated is controlled by the object:
                      sdlcLSAdminRETRIESn.  The interval between retry
                      sequences is controlled by the object:
                      sdlcLSAdminRETRIESt.
                      A value of zero indicates no retries. If the
                      value of sdlcLSAdminRETRIESm is zero, then the
                      values of sdlcLSAdminRETRIESt and
                      sdlcLSAdminRETRIESn should also be zero.
                      Depending on the implementation, a write
                      operation to this administered value  may not
                      change the operational value,
                      sdlcLSOperRETRIESm, until the link station is
                      cycled inactive."

Hilgeman, Nix, Bartky & Clark [Page 31] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                  DEFVAL { 15 }
                  ::= { sdlcLSAdminEntry 11 }

sdlcLSAdminRETRIESt OBJECT-TYPE

                  SYNTAX      TimeInterval
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object controls the interval (in 1/100ths
                      of a second) between retry sequences for the
                      local SDLC link station if multiple retry
                      sequences are specified .  A retry sequence is
                      a series of retransmitted frames ( data or
                      control) for which no positive acknowledgement
                      is received.
                      The number of repeated retries sequences is
                      controlled by the object: sdlcLSAdminRETRIESn.
                      The retries per sequence is controlled by the
                      object:  sdlcLSAdminRETRIESm.
                      The object descriptor contains the name of an
                      NCP configuration parameter, RETRIESt.  Please
                      note that the value of this object represents
                      1/100ths of a second while the NCP RETRIESt is
                      represented in seconds.
                      Depending on the implementation, a write
                      operation to this administered value  may not
                      change the operational value,
                      sdlcLSOperRETRIESt, until the link station is
                      cycled inactive."
                  DEFVAL { 0 }
                  ::= { sdlcLSAdminEntry 12 }

sdlcLSAdminRETRIESn OBJECT-TYPE

                  SYNTAX      Integer32
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object controls the number of times that
                      a retry sequence is repeated for the local SDLC
                      link station.  A retry sequence is a series of
                      retransmitted frames ( data or control) for
                      which no positive acknowledgement is received.
                      The interval between retry sequences is
                      controlled by the object: sdlcLSAdminRETRIESn.

Hilgeman, Nix, Bartky & Clark [Page 32] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      The retries per sequence is controlled by the
                      object:  sdlcLSAdminRETRIESm.
                      Depending on the implementation, a write
                      operation to this administered value  may not
                      change the operational value,
                      sdlcLSOperRETRIESn, until the link station is
                      cycled inactive."
                  DEFVAL { 0 }
                  ::= { sdlcLSAdminEntry 13 }

sdlcLSAdminRNRLIMIT OBJECT-TYPE

                  SYNTAX      TimeInterval
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object controls the length of time (in
                      1/100ths of a second) that an SDLC link station
                      will allow its adjacent link station to remain
                      in a busy (RNR) state before declaring it
                      inoperative.
                      A value of sdlcLSAdminRNRLIMIT == 0 means there
                      is no limit.
                      The object descriptor contains the name of an
                      NCP configuration parameter, RNRLIMIT.  Please
                      note that the value of this object represents
                      1/100ths of a second while the NCP RNRLIMIT is
                      represented in minutes.
                      Depending on the implementation, a write
                      operation to this administered value  may not
                      change the operational value,
                      sdlcLSOperRNRLIMIT, until the link station is
                      cycled inactive."
                  DEFVAL { 18000 }
                  ::= { sdlcLSAdminEntry 14 }

sdlcLSAdminDATMODE OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                      half(1),
                      full(2)
                  }
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION

Hilgeman, Nix, Bartky & Clark [Page 33] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      "This object controls whether communications
                      mode with the adjacent link station is
                      two-way-alternate (half) or two-way-simultaneous
                      (full).
                      A write operation to this administered value
                      will not change the operational value,
                      sdlcLSOperDATMODE, until the link station is
                      cycled inactive."
                  DEFVAL { half }
                  ::= { sdlcLSAdminEntry 15 }

sdlcLSAdminGPoll OBJECT-TYPE

                  SYNTAX      INTEGER (0..254)
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object describes the group poll address
                      for this link station instance.  If group poll
                      is not in effect for this link station
                      instance, the value for sdlcLSAdminGPoll should
                      be zero.
                      Depending on the implementation, a write
                      operation to this administered value may not
                      change the operational value, sdlcLSOperGPoll,
                      until the link station is cycled inactive."
                  ::= { sdlcLSAdminEntry 16 }

sdlcLSAdminSimRim OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                       no(1),
                       yes(2)
                  }
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object controls the support for
                      transmission and receipt of SIM and RIM control
                      frames for this link station.  The value of
                      this object controls the setting of the
                      transmit-receive capability sent in the XID
                      field."
                  DEFVAL { no }
                  ::= { sdlcLSAdminEntry 17 }

sdlcLSAdminXmitRcvCap OBJECT-TYPE

Hilgeman, Nix, Bartky & Clark [Page 34] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                  SYNTAX      INTEGER
                  {
                       twa(1),
                       tws(2)
                  }
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object controls the transmit-receive
                      capabilities for this SDLC link station.  The
                      value of this object establishes the value of
                      the transmit-receive capability indicator sent
                      in the XID image to the adjacent link station."
                  DEFVAL { twa }
                  ::= { sdlcLSAdminEntry 18 }

sdlcLSAdminRowStatus OBJECT-TYPE

                  SYNTAX      RowStatus
                  MAX-ACCESS  read-create
                  STATUS      current
                  DESCRIPTION
                      "This object is used by a management station to
                      create or delete the row entry in
                      sdlcLSAdminTable following the RowStatus
                      textual convention.
                      Upon successful creation of the row, an agent
                      automatically creates a corresponding entry in
                      the sdlcLSOperTable with sdlcLSOperState equal
                      to 'discontacted (1)'."
                  ::= { sdlcLSAdminEntry 19 }

* – * * – * THE SDLC LINK STATION OPERATIONAL TABLE * – * * – *

sdlcLSOperTable OBJECT-TYPE

                  SYNTAX      SEQUENCE OF SdlcLSOperEntry
                  MAX-ACCESS  not-accessible
                  STATUS      current
                  DESCRIPTION
                        "This table contains current SDLC link
                        parameters.  Many of these objects have
                        corresponding objects in the
                        sdlcLSAdminTable."
                  ::= { sdlcLSGroup 2 }

Hilgeman, Nix, Bartky & Clark [Page 35] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

sdlcLSOperEntry OBJECT-TYPE

                  SYNTAX      SdlcLSOperEntry
                  MAX-ACCESS  not-accessible
                  STATUS      current
                  DESCRIPTION
                       "A list of status and control values for an
                       SDLC link station."
                  INDEX   { ifIndex, sdlcLSAddress }
                  ::= { sdlcLSOperTable 1 }

SdlcLSOperEntry ::= SEQUENCE {

      sdlcLSOperName                  DisplayString,
      sdlcLSOperRole                  INTEGER,
      sdlcLSOperState                 INTEGER,
      sdlcLSOperMAXDATASend           Integer32,
      sdlcLSOperREPLYTO               TimeInterval,
      sdlcLSOperMAXIN                 INTEGER,
      sdlcLSOperMAXOUT                INTEGER,
      sdlcLSOperMODULO                INTEGER,
      sdlcLSOperRETRIESm              INTEGER,
      sdlcLSOperRETRIESt              TimeInterval,
      sdlcLSOperRETRIESn              INTEGER,
      sdlcLSOperRNRLIMIT              TimeInterval,
      sdlcLSOperDATMODE               INTEGER,
      sdlcLSOperLastModifyTime        TimeTicks,
      sdlcLSOperLastFailTime          TimeTicks,
      sdlcLSOperLastFailCause         INTEGER,
      sdlcLSOperLastFailCtrlIn        OCTET STRING,
      sdlcLSOperLastFailCtrlOut       OCTET STRING,
      sdlcLSOperLastFailFRMRInfo      OCTET STRING,
      sdlcLSOperLastFailREPLYTOs      Counter32,
      sdlcLSOperEcho                  INTEGER,
      sdlcLSOperGPoll                 INTEGER,
      sdlcLSOperSimRim                INTEGER,
      sdlcLSOperXmitRcvCap            INTEGER

}

sdlcLSOperName OBJECT-TYPE

                  SYNTAX      DisplayString (SIZE (1..10))
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                       "An octet string that defines the name of the
                       remote SDLC link station.  This field is
                       received in the XID3 control vector 0x0E, type
                       0xF7."
                  ::= { sdlcLSOperEntry 1 }

Hilgeman, Nix, Bartky & Clark [Page 36] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

sdlcLSOperRole OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                      primary(1),
                      secondary(2),
                      undefined(3)
                  }
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the current role that the
                      link station is assuming.
                      The value of sdlcLSOperRole is undefined(3)
                      whenever the link station role has not yet been
                      established by the mode setting command."
                  ::= { sdlcLSOperEntry 2 }

sdlcLSOperState OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                      discontacted(1),
                      contactPending(2),
                      contacted(3),
                      discontactPending(4)
                  }
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object describes the operational state of
                      the SDLC link station.  The managed system
                      shall attempt to keep this value consistent
                      with the administered state, sdlcLSAdminState"
                  ::= { sdlcLSOperEntry 3 }

sdlcLSOperMAXDATASend OBJECT-TYPE

                  SYNTAX      Integer32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object contains the actual maximum PDU
                      size that the local link station can send to
                      the adjacent link station.  This object is
                      established from the value received in the XID
                      from the adjacent link station.  If no XID
                      is received, then this value is implementation
                      dependent (for instance, it could be the value
                      of sdlcLSAdminMAXDATASend).

Hilgeman, Nix, Bartky & Clark [Page 37] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      This value includes the Transmission Header
                      (TH) and the Request Header (RH)."
                  ::= { sdlcLSOperEntry 4 }

sdlcLSOperREPLYTO OBJECT-TYPE

                  SYNTAX      TimeInterval
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the current reply timeout
                      (in 1/100ths of a second) for an SDLC link
                      station.  If the link station does not receive
                      a response to a poll or message before the
                      specified time expires then the appropriate
                      error recovery shall be initiated.
                      The object descriptor contains the name of an
                      NCP configuration parameter, REPLYTO.  Please
                      note that the value of this object represents
                      1/100ths of a second while the NCP REPLYTO is
                      represented in 1/10ths of a second.
                      This object only has meaning for SDLC ports
                      where sdlcPortOperRole == primary "
                  ::= { sdlcLSOperEntry 5 }

sdlcLSOperMAXIN OBJECT-TYPE

                  SYNTAX      INTEGER (1..127)
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the current maximum
                      number of unacknowledged I-frames which an SDLC
                      link station may receive.  This shall range
                      from 1 to (sdlcLSOperMODULO - 1)."
                  ::= { sdlcLSOperEntry 6 }

sdlcLSOperMAXOUT OBJECT-TYPE

                  SYNTAX      INTEGER (1..127)
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object controls the maximum number of
                      consecutive unacknowledged I-frames which an
                      SDLC link station shall send without an
                      acknowledgement.  This shall range from 1 to
                      (sdlcLSAdminMODULO - 1).

Hilgeman, Nix, Bartky & Clark [Page 38] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      This value may controlled by the administered
                      MAXOUT, sdlcLSAdminMAXOUT, or by the MAXIN value
                      received during the XID exchange."
                  ::= { sdlcLSOperEntry 7 }

sdlcLSOperMODULO OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                      eight(8),
                      onetwentyeight(128)
                  }
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the current modulus for
                      an SDLC link station.  This modulus determines
                      the size of rotating acknowledgement window
                      used by the SDLC link station pair."
                   DEFVAL { eight }
                  ::= { sdlcLSOperEntry 8 }

sdlcLSOperRETRIESm OBJECT-TYPE

                  SYNTAX      INTEGER (0..128)
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object controls number of retries in a
                      retry sequence for an SDLC link station.  A
                      retry sequence is a series of retransmitted
                      frames ( data or control) for which no positive
                      acknowledgement is received.
                      The current number of times that the retry
                      sequence is to be repeated is reflected by the
                      object:  sdlcLSOperRETRIESn.  The current
                      interval between retry sequences is reflected
                      by the object:  sdlcLSOperRETRIESt."
                  ::= { sdlcLSOperEntry 9 }

sdlcLSOperRETRIESt OBJECT-TYPE

                  SYNTAX      TimeInterval
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the current interval (in
                      1/100ths of a second) between retry sequences
                      for an SDLC link station if multiple retry
                      sequences are specified.  A retry sequence is a

Hilgeman, Nix, Bartky & Clark [Page 39] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      series of retransmitted frames ( data or
                      control) for which no positive acknowledgement
                      is received.
                      The object descriptor contains the name of an
                      NCP configuration parameter, RETRIESt.  Please
                      note that the value of this object represents
                      1/100ths of a second while the NCP RETRIESt is
                      represented in seconds.
                      The current number of repeated retries
                      sequences is reflected by the object:
                      sdlcLSOperRETRIESn.  The current retries per
                      sequence is reflected by the object:
                      sdlcLSOperRETRIESm."
                  ::= { sdlcLSOperEntry 10 }

sdlcLSOperRETRIESn OBJECT-TYPE

                  SYNTAX      INTEGER (0..127)
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the current number of
                      times that a retry sequence is repeated for an
                      SDLC link station.  A retry sequence is a
                      series of retransmitted frames ( data or
                      control) for which no positive acknowledgement
                      is received.
                      The current interval between retry sequences is
                      reflected by the object: sdlcLSOperRETRIESn.
                      The current retries per sequence is reflected
                      by the object:  sdlcLSOperRETRIESm."
                  ::= { sdlcLSOperEntry 11 }

sdlcLSOperRNRLIMIT OBJECT-TYPE

                  SYNTAX      TimeInterval
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the current length of
                      time (in 1/100ths of a second) that an SDLC
                      link station will allow its adjacent link
                      station to remain in a busy (RNR) state before
                      declaring it inoperative.
                      The object descriptor contains the name of an
                      NCP configuration parameter, RNRLIMIT.  Please

Hilgeman, Nix, Bartky & Clark [Page 40] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      note that the value of this object represents
                      1/100ths of a second while the NCP RNRLIMIT is
                      represented in minutes.
                      A value of sdlcLSOperRNRLIMIT == 0 means there
                      is no limit."
                  ::= { sdlcLSOperEntry 12 }

sdlcLSOperDATMODE OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                      half(1),
                      full(2)
                  }
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects whether the current
                      communications mode with the adjacent link
                      station is two-way-alternate (half) or
                      two-way-simultaneous (full)."
                  ::= { sdlcLSOperEntry 13 }

sdlcLSOperLastModifyTime OBJECT-TYPE

                  SYNTAX      TimeTicks
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object describes the value of sysUpTime
                       when this link station definition was last
                       modified.  If the link station has not been
                       modified, then this value shall be zero."
                  ::= { sdlcLSOperEntry 14 }

sdlcLSOperLastFailTime OBJECT-TYPE

                  SYNTAX      TimeTicks
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object describes the value of sysUpTime
                       when this SDLC link station last failed.  If
                       the link station has not failed, then this
                       value shall be zero."
                  ::= { sdlcLSOperEntry 15 }

sdlcLSOperLastFailCause OBJECT-TYPE

                  SYNTAX      INTEGER
                  {

Hilgeman, Nix, Bartky & Clark [Page 41] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      undefined(1),
                      rxFRMR(2),
                      txFRMR(3),
                      noResponse(4),
                      protocolErr(5),
                      noActivity(6),
                      rnrLimit(7),
                      retriesExpired(8)
                  }
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This enumerated object reflects the cause of
                      the last failure of this SDLC link station.  If
                      the link station has not failed, then this
                      object will have a value of undefined(1)."
                  DEFVAL { undefined }
                  ::= { sdlcLSOperEntry 16 }

sdlcLSOperLastFailCtrlIn OBJECT-TYPE

                  SYNTAX      OCTET STRING (SIZE(1..2))
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the last control octet or
                      octets (depending on modulus) received by this
                      SDLC link station at the time of the last
                      failure.  If the link station has not failed,
                      then this value has no meaning."
                  ::= { sdlcLSOperEntry 17 }

sdlcLSOperLastFailCtrlOut OBJECT-TYPE

                  SYNTAX      OCTET STRING (SIZE(1..2))
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the last control octet or
                      octets (depending on modulus) sent by this SDLC
                      link station at the time of the last failure.
                      If the link station has not failed, then this
                      value has no meaning."
                  ::= { sdlcLSOperEntry 18 }

sdlcLSOperLastFailFRMRInfo OBJECT-TYPE

                  SYNTAX      OCTET STRING (SIZE(3))
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION

Hilgeman, Nix, Bartky & Clark [Page 42] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      "This object reflects the information field of
                      the FRMR frame if the last failure for this
                      SDLC link station was as a result of an invalid
                      frame.  Otherwise, this field has no meaning."
                  ::= { sdlcLSOperEntry 19 }

sdlcLSOperLastFailREPLYTOs OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the number of times that
                      the REPLYTO timer had expired for an SDLC link
                      station at the time of the last failure. If the
                      link station has not failed, then this value
                      has no meaning."
                  ::= { sdlcLSOperEntry 20 }

sdlcLSOperEcho OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                       no(1),
                       yes(2)
                  }
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object identifies whether the echo bit is
                       in effect for this particular link station."
                  DEFVAL { no }
                  ::= { sdlcLSOperEntry 21 }

sdlcLSOperGPoll OBJECT-TYPE

                  SYNTAX      INTEGER (0..254)
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object describes the group poll address
                      in effect for this link station instance."
                  DEFVAL { 0 }
                  ::= { sdlcLSOperEntry 22 }

sdlcLSOperSimRim OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                       no(1),
                       yes(2)
                  }

Hilgeman, Nix, Bartky & Clark [Page 43] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the support for
                      transmission and receipt of SIM and RIM control
                      frames for the adjacent link station.  The
                      value of this object is set from the XID field
                      received from the adjacent link station."
                  DEFVAL { no }
                  ::= { sdlcLSOperEntry 23 }

sdlcLSOperXmitRcvCap OBJECT-TYPE

                  SYNTAX      INTEGER
                  {
                       twa(1),
                       tws(2)
                  }
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the transmit-receive
                      capabilities for the adjacent SDLC link
                      station.  The value of this object is the value
                      of the transmit-receive capability indicator
                      received in the XID image from the adjacent
                      link station."
                  DEFVAL { twa }
                  ::= { sdlcLSOperEntry 24 }

* – * * – * THE SDLC LINK STATION STATISTICS TABLE * – * * – *

sdlcLSStatsTable OBJECT-TYPE

                  SYNTAX      SEQUENCE OF SdlcLSStatsEntry
                  MAX-ACCESS  not-accessible
                  STATUS      current
                  DESCRIPTION
                      "Each entry in this table contains statistics
                      for a specific SDLC link station."
                   ::= { sdlcLSGroup 3 }

sdlcLSStatsEntry OBJECT-TYPE

                  SYNTAX      SdlcLSStatsEntry
                  MAX-ACCESS  not-accessible

Hilgeman, Nix, Bartky & Clark [Page 44] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                  STATUS      current
                  DESCRIPTION
                      "A list of statistics for an SDLC link station."
                  INDEX   { ifIndex, sdlcLSAddress }
                  ::= { sdlcLSStatsTable 1 }

SdlcLSStatsEntry ::= SEQUENCE {

      sdlcLSStatsBLUsIn             Counter32,
      sdlcLSStatsBLUsOut            Counter32,
      sdlcLSStatsOctetsIn           Counter32,
      sdlcLSStatsOctetsOut          Counter32,
      sdlcLSStatsPollsIn            Counter32,
      sdlcLSStatsPollsOut           Counter32,
      sdlcLSStatsPollRspsIn         Counter32,
      sdlcLSStatsPollRspsOut        Counter32,
      sdlcLSStatsLocalBusies        Counter32,
      sdlcLSStatsRemoteBusies       Counter32,
      sdlcLSStatsIFramesIn          Counter32,
      sdlcLSStatsIFramesOut         Counter32,
      sdlcLSStatsUIFramesIn         Counter32,
      sdlcLSStatsUIFramesOut        Counter32,
      sdlcLSStatsXIDsIn             Counter32,
      sdlcLSStatsXIDsOut            Counter32,
      sdlcLSStatsTESTsIn            Counter32,
      sdlcLSStatsTESTsOut           Counter32,
      sdlcLSStatsREJsIn             Counter32,
      sdlcLSStatsREJsOut            Counter32,
      sdlcLSStatsFRMRsIn            Counter32,
      sdlcLSStatsFRMRsOut           Counter32,
      sdlcLSStatsSIMsIn             Counter32,
      sdlcLSStatsSIMsOut            Counter32,
      sdlcLSStatsRIMsIn             Counter32,
      sdlcLSStatsRIMsOut            Counter32,
      sdlcLSStatsDISCIn             Counter32,
      sdlcLSStatsDISCOut            Counter32,
      sdlcLSStatsUAIn               Counter32,
      sdlcLSStatsUAOut              Counter32,
      sdlcLSStatsDMIn               Counter32,
      sdlcLSStatsDMOut              Counter32,
      sdlcLSStatsSNRMIn             Counter32,
      sdlcLSStatsSNRMOut            Counter32,
      sdlcLSStatsProtocolErrs       Counter32,
      sdlcLSStatsActivityTOs        Counter32,
      sdlcLSStatsRNRLIMITs          Counter32,
      sdlcLSStatsRetriesExps        Counter32,
      sdlcLSStatsRetransmitsIn      Counter32,
      sdlcLSStatsRetransmitsOut     Counter32

Hilgeman, Nix, Bartky & Clark [Page 45] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

}

sdlcLSStatsBLUsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total basic link
                      units (BLUs; frames) received from an adjacent
                      SDLC link station since link station startup.
                      At link station startup time, this object must
                      be initialized to zero."
                  ::= { sdlcLSStatsEntry 1 }

sdlcLSStatsBLUsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total basic link
                      units (BLUs; frames), transmitted to an
                      adjacent SDLC link station since link station
                      startup.  At link station startup time, this
                      object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 2 }

sdlcLSStatsOctetsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total octets received
                      from an adjacent SDLC link station since link
                      station startup.  This object covers the
                      address, control, and information field of
                      I-Frames only.  At link station startup time,
                      this object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 3 }

sdlcLSStatsOctetsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total octets
                      transmitted to an adjacent SDLC link station
                      since link station startup.  This object covers
                      the address, control, and information field of

Hilgeman, Nix, Bartky & Clark [Page 46] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      I-Frames only.  At link station startup time,
                      this object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 4 }

sdlcLSStatsPollsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total polls received
                      from an adjacent SDLC link station since link
                      station startup.  At link station startup time,
                      this object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 5 }

sdlcLSStatsPollsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total polls sent to
                      an adjacent SDLC link station since link
                      station startup.  At link station startup time,
                      this object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 6 }

sdlcLSStatsPollRspsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of poll
                      responses sent to the adjacent SDLC link
                      station since link station startup.  This value
                      includes I-frames that are sent in response to
                      a poll.
                      At link station startup time, this object must
                      be initialized to zero."
                  ::= { sdlcLSStatsEntry 7 }

sdlcLSStatsPollRspsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of poll
                      responses received from the adjacent SDLC link

Hilgeman, Nix, Bartky & Clark [Page 47] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      station since station startup.  This value
                      includes I-frames that are received in response
                      to a poll.
                      At link station startup time, this object must
                      be initialized to zero."
                  ::= { sdlcLSStatsEntry 8 }

sdlcLSStatsLocalBusies OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of times
                      that the local SDLC link station has entered a
                      busy state (RNR) since link station startup.
                      At link station startup time, this object must
                      be initialized to zero."
                  ::= { sdlcLSStatsEntry 9 }

sdlcLSStatsRemoteBusies OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of times
                      that an adjacent ( remote) SDLC link station
                      has entered a busy state (RNR) since link
                      station startup.  At link station startup time,
                      this object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 10 }

sdlcLSStatsIFramesIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total I-frames
                      received from an adjacent SDLC link station
                      since link station startup.  At link station
                      startup time, this object must be initialized
                      to zero."
                  ::= { sdlcLSStatsEntry 11 }

sdlcLSStatsIFramesOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current

Hilgeman, Nix, Bartky & Clark [Page 48] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                  DESCRIPTION
                      "This object reflects the total I-frames
                      transmitted to an adjacent SDLC link station
                      since link station startup.  At link station
                      startup time, this object must be initialized
                      to zero."
                  ::= { sdlcLSStatsEntry 12 }

sdlcLSStatsUIFramesIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total UI-frames
                      received from an adjacent SDLC link station
                      since link station startup."
                  ::= { sdlcLSStatsEntry 13 }

sdlcLSStatsUIFramesOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                     "This object reflects the total UI-frames
                     transmitted to an adjacent SDLC link station
                     since link station startup."
                  ::= { sdlcLSStatsEntry 14 }

sdlcLSStatsXIDsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total XID frames
                      received from an adjacent SDLC link station
                      since link station startup."
                  ::= { sdlcLSStatsEntry 15 }

sdlcLSStatsXIDsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total XID frames
                      transmitted to an adjacent SDLC link station
                      since link station startup."
                  ::= { sdlcLSStatsEntry 16 }

Hilgeman, Nix, Bartky & Clark [Page 49] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

sdlcLSStatsTESTsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total TEST frames,
                      commands or responses, received from an
                      adjacent SDLC link station since link station
                      startup."
                  ::= { sdlcLSStatsEntry 17 }

sdlcLSStatsTESTsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total TEST frames,
                      commands or responses, transmitted to an
                      adjacent SDLC link station since link station
                      startup."
                  ::= { sdlcLSStatsEntry 18 }

sdlcLSStatsREJsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total REJ frames
                      received from an adjacent SDLC link station
                      since link station startup."
                  ::= { sdlcLSStatsEntry 19 }

sdlcLSStatsREJsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total REJ frames
                      transmitted to an adjacent SDLC link station
                      since link station startup."
                  ::= { sdlcLSStatsEntry 20 }

sdlcLSStatsFRMRsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total frame reject

Hilgeman, Nix, Bartky & Clark [Page 50] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      (FRMR) frames received from an adjacent SDLC
                      link station since link station startup."
                  ::= { sdlcLSStatsEntry 21 }

sdlcLSStatsFRMRsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total frame reject
                      (FRMR) frames transmitted to an adjacent SDLC
                      link station since link station startup."
                  ::= { sdlcLSStatsEntry 22 }

sdlcLSStatsSIMsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total set
                      initialization mode (SIM) frames received from
                      an adjacent SDLC link station since link station
                      startup."
                  ::= { sdlcLSStatsEntry 23 }

sdlcLSStatsSIMsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total set
                      initialization mode (SIM) frames transmitted to
                      an adjacent SDLC link station since link station
                      startup.  At link station startup time, this
                      object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 24 }

sdlcLSStatsRIMsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total request
                      initialization mode (RIM) frames received from
                      an adjacent SDLC link station since link station
                      startup.  At link station startup time, this
                      object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 25 }

Hilgeman, Nix, Bartky & Clark [Page 51] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

sdlcLSStatsRIMsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total request
                      initialization mode (RIM) frames transmitted to
                      an adjacent SDLC link station since link station
                      startup.  At link station startup time, this
                      object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 26 }

sdlcLSStatsDISCIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of
                       disconnect (DISC) requests received from an
                       adjacent SDLC link station since link station
                       startup.  At link station startup time, this
                       object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 27 }

sdlcLSStatsDISCOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of
                       disconnect (DISC) requests transmited to an
                       adjacent SDLC link station since link station
                       startup.  At link station startup time, this
                       object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 28 }

sdlcLSStatsUAIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of
                       unnumbered acknowledgements (UA) requests
                       received from an adjacent SDLC link station
                       since link station startup.  At link station
                       startup time, this object must be initialized
                       to zero."
                  ::= { sdlcLSStatsEntry 29 }

Hilgeman, Nix, Bartky & Clark [Page 52] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

sdlcLSStatsUAOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of
                       unnumbered acknowledgements (UA) requests
                       transmited to an adjacent SDLC link station
                       since link station startup.  At link station
                       startup time, this object must be initialized
                       to zero."
                  ::= { sdlcLSStatsEntry 30 }

sdlcLSStatsDMIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of
                       disconnect mode (DM) requests received from an
                       adjacent SDLC link station since link station
                       startup.  At link station startup time, this
                       object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 31 }

sdlcLSStatsDMOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of
                       disconnect mode (DM) requests transmited to an
                       adjacent SDLC link station since link station
                       startup.  At link station startup time, this
                       object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 32 }

sdlcLSStatsSNRMIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of
                       set normal response mode (SNRM/SNRME) requests
                       received from an adjacent SDLC link station
                       since link station startup.  At link station
                       startup time, this object must be initialized
                       to zero."

Hilgeman, Nix, Bartky & Clark [Page 53] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                  ::= { sdlcLSStatsEntry 33 }

sdlcLSStatsSNRMOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of
                       set normal response mode (SNRM/SNRME) requests
                       transmited to an adjacent SDLC link station
                       since link station startup.  At link station
                       startup time, this object must be initialized
                       to zero."
                  ::= { sdlcLSStatsEntry 34 }

sdlcLSStatsProtocolErrs OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total occurrences,
                      since link station startup, where this SDLC
                      link station has inactivated the link as a
                      result of receiving a frame from its adjacent
                      link station which was in violation of the
                      protocol.  At link station startup time, this
                      object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 35 }

sdlcLSStatsActivityTOs OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total occurrences,
                      since startup, where this SDLC link station has
                      inactivated the link as a result of no activity
                      on the link.  At link station startup time,
                      this object must be initialized to zero."
                  ::= { sdlcLSStatsEntry 36 }

sdlcLSStatsRNRLIMITs OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total occurrences,
                      since startup, where this SDLC link station has

Hilgeman, Nix, Bartky & Clark [Page 54] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                      inactivated the link as a result of its
                      RNRLIMIT timer expiring.  At link station
                      startup time, this object must be initialized
                      to zero."
                  ::= { sdlcLSStatsEntry 37 }

sdlcLSStatsRetriesExps OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total occurrences,
                      since startup, where this SDLC link station has
                      inactivated the link as a result of a retry
                      sequence being exhausted.  At link station
                      startup time, this object must be initialized
                      to zero."
                  ::= { sdlcLSStatsEntry 38 }

sdlcLSStatsRetransmitsIn OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current
                  DESCRIPTION
                      "This object reflects the total number of
                       information frames retransmitted by the remote
                       link station because the N(s) received from
                       that link station indicated that one or more
                       information frames sent by that station were
                       lost.  This event causes the first missing
                       information frame of a window and all
                       subsequent information frames to be
                       retransmitted.  At link station startup time,
                       this object must be initialized to zero.
                       Management: If the value of
                       sdlcLSStatsRetransmitsIn grows over time, then
                       the quality of the serial line is in
                       question.  You might want to look at
                       decreasing the value for
                       sdlcLSAdminMAXDATASend to compensate for the
                       lower quality line."
                  ::= { sdlcLSStatsEntry 39 }

sdlcLSStatsRetransmitsOut OBJECT-TYPE

                  SYNTAX      Counter32
                  MAX-ACCESS  read-only
                  STATUS      current

Hilgeman, Nix, Bartky & Clark [Page 55] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                  DESCRIPTION
                      "This object reflects the total number of
                       information frames retransmitted to a remote
                       link station because the N(r) received from
                       that link station indicated that one or more
                       information frames sent to that station were
                       lost. This event causes the first missing
                       information frame of a window and all
                       subsequent information frames to be
                       retransmitted.  At link station startup time,
                       this object must be initialized to zero.
                       Management: If the value of
                       sdlcLSStatsRetransmitsOut grows over time,
                       then the quality of the serial line is in
                       question.  You might want to look at
                       decreasing the value for sdlcLSAdminMAXDATASend
                       to compensate for the lower quality line."
                  ::= { sdlcLSStatsEntry 40 }

– – TRAP DEFINITIONS –

– – Notifications –

sdlcTraps OBJECT IDENTIFIER ::= { sdlc 3 }

sdlcPortStatusChange NOTIFICATION-TYPE

                   OBJECTS    { ifIndex,
                                ifAdminStatus,
                                ifOperStatus,
                                sdlcPortOperLastFailTime,
                                sdlcPortOperLastFailCause
                              }
                   STATUS  current
                   DESCRIPTION
                       "This trap indicates that the state of an SDLC
                       port has transitioned to active or inactive."
                   ::= { sdlcTraps 1 }

sdlcLSStatusChange NOTIFICATION-TYPE

                   OBJECTS    { ifIndex,
                                sdlcLSAddress,
                                sdlcLSOperState,
                                sdlcLSAdminState,

Hilgeman, Nix, Bartky & Clark [Page 56] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                                sdlcLSOperLastFailTime,
                                sdlcLSOperLastFailCause,
                                sdlcLSOperLastFailFRMRInfo,
                                sdlcLSOperLastFailCtrlIn,
                                sdlcLSOperLastFailCtrlOut,
                                sdlcLSOperLastFailREPLYTOs
                              }
                   STATUS  current
                   DESCRIPTION
                       "This trap indicates that the state of an SDLC
                       link station has transitioned to contacted or
                       discontacted."
                   ::= { sdlcTraps 2 }

– – Conformance Information –

sdlcConformance OBJECT IDENTIFIER ::= { sdlc 4 }

sdlcCompliances OBJECT IDENTIFIER ::= { sdlcConformance 1 } sdlcGroups OBJECT IDENTIFIER ::= { sdlcConformance 2 }

– – Compliance Statements –

sdlcCoreCompliance MODULE-COMPLIANCE

                   STATUS current
                   DESCRIPTION
                       "The core compliance statement for all SDLC
                       nodes."
                   MODULE
                       MANDATORY-GROUPS
                       {
                           sdlcCorePortAdminGroup,
                           sdlcCorePortOperGroup,
                           sdlcCorePortStatsGroup,
                           sdlcCoreLSAdminGroup,
                           sdlcCoreLSOperGroup,
                           sdlcCoreLSStatsGroup
                       }
                   OBJECT      sdlcPortAdminName
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."

Hilgeman, Nix, Bartky & Clark [Page 57] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                   OBJECT      sdlcPortAdminRole
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcPortAdminType
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcPortAdminTopology
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcPortAdminISTATUS
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAddress
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminName
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminState
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminISTATUS
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminMAXDATASend
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminMAXDATARcv
                   MIN-ACCESS  read-only
                   DESCRIPTION

Hilgeman, Nix, Bartky & Clark [Page 58] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                       "Write access is not required."
                   OBJECT      sdlcLSAdminMAXIN
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminMAXOUT
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminMODULO
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminRETRIESm
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminRETRIESt
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminRETRIESn
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminRNRLIMIT
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminDATMODE
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminGPoll
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminSimRim

Hilgeman, Nix, Bartky & Clark [Page 59] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminRowStatus
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   ::= { sdlcCompliances 1 }

sdlcPrimaryCompliance MODULE-COMPLIANCE

                   STATUS current
                   DESCRIPTION
                       "The compliance statement for all nodes that
                       are performing the role of a Primary link
                       station."
                   MODULE
                       MANDATORY-GROUPS { sdlcPrimaryGroup }
                   OBJECT      sdlcPortAdminPAUSE
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcLSAdminREPLYTO
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   ::= { sdlcCompliances 2 }

sdlcPrimaryMultipointCompliance MODULE-COMPLIANCE

                   STATUS current
                   DESCRIPTION
                       "The compliance statement for all nodes that
                       are performing the role of a primary link
                       station on a multipoint line."
                   MODULE
                       MANDATORY-GROUPS { sdlcPrimaryMultipointGroup }
                   OBJECT      sdlcPortAdminSERVLIM
                   MIN-ACCESS  read-only
                   DESCRIPTION
                       "Write access is not required."
                   OBJECT      sdlcPortAdminSlowPollTimer
                   MIN-ACCESS  read-only

Hilgeman, Nix, Bartky & Clark [Page 60] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                   DESCRIPTION
                       "Write access is not required."
                   ::= { sdlcCompliances 3 }

– – Core Conformance Groups for All Link Stations –

sdlcCoreGroups OBJECT IDENTIFIER ::= { sdlcGroups 1 }

sdlcCorePortAdminGroup OBJECT-GROUP

                   OBJECTS
                   {
                       sdlcPortAdminName,      sdlcPortAdminRole,
                       sdlcPortAdminType,      sdlcPortAdminTopology,
                       sdlcPortAdminISTATUS
                   }
                   STATUS current
                   DESCRIPTION
                       "The sdlcCorePortAdminGroup defines objects
                       which are common to the PortAdmin group of all
                       compliant link stations."
                   ::= { sdlcCoreGroups 1 }

sdlcCorePortOperGroup OBJECT-GROUP

                   OBJECTS
                   {
                       sdlcPortOperName,
                       sdlcPortOperRole,
                       sdlcPortOperType,
                       sdlcPortOperTopology,
                       sdlcPortOperISTATUS,
                       sdlcPortOperACTIVTO,
                       sdlcPortOperLastFailTime,
                       sdlcPortOperLastFailCause
                   }
                   STATUS current
                   DESCRIPTION
                       "The sdlcCorePortOperGroup defines objects
                       which are common to the PortOper group of all
                       compliant link stations."
                   ::= { sdlcCoreGroups 2 }

sdlcCorePortStatsGroup OBJECT-GROUP

                   OBJECTS

Hilgeman, Nix, Bartky & Clark [Page 61] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                   {
                       sdlcPortStatsPhysicalFailures,
                       sdlcPortStatsInvalidAddresses,
                       sdlcPortStatsDwarfFrames
                   }
                   STATUS current
                   DESCRIPTION
                       "The sdlcCorePortStatsGroup defines objects
                       which are common to the PortStats group of all
                       compliant link stations."
                   ::= { sdlcCoreGroups 3 }

sdlcCoreLSAdminGroup OBJECT-GROUP

                   OBJECTS
                   {
                       sdlcLSAddress,
                       sdlcLSAdminName,
                       sdlcLSAdminState,
                       sdlcLSAdminISTATUS,
                       sdlcLSAdminMAXDATASend,
                       sdlcLSAdminMAXDATARcv,
                       sdlcLSAdminMAXIN,
                       sdlcLSAdminMAXOUT,
                       sdlcLSAdminMODULO,
                       sdlcLSAdminRETRIESm,
                       sdlcLSAdminRETRIESt,
                       sdlcLSAdminRETRIESn,
                       sdlcLSAdminRNRLIMIT,
                       sdlcLSAdminDATMODE,
                       sdlcLSAdminGPoll,
                       sdlcLSAdminSimRim,
                       sdlcLSAdminRowStatus
                   }
                   STATUS current
                   DESCRIPTION
                       "The sdlcCorePortAdminGroup defines objects
                       which are common to the PortAdmin group of all
                       compliant link stations."
                   ::= { sdlcCoreGroups 4 }

sdlcCoreLSOperGroup OBJECT-GROUP

                   OBJECTS
                   {
                       sdlcLSOperRole,
                       sdlcLSOperState,
                       sdlcLSOperMAXDATASend,
                       sdlcLSOperMAXIN,

Hilgeman, Nix, Bartky & Clark [Page 62] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                       sdlcLSOperMAXOUT,
                       sdlcLSOperMODULO,
                       sdlcLSOperRETRIESm,
                       sdlcLSOperRETRIESt,
                       sdlcLSOperRETRIESn,
                       sdlcLSOperRNRLIMIT,
                       sdlcLSOperDATMODE,
                       sdlcLSOperLastFailTime,
                       sdlcLSOperLastFailCause,
                       sdlcLSOperLastFailCtrlIn,
                       sdlcLSOperLastFailCtrlOut,
                       sdlcLSOperLastFailFRMRInfo,
                       sdlcLSOperLastFailREPLYTOs,
                       sdlcLSOperEcho,
                       sdlcLSOperGPoll
                   }
                   STATUS current
                   DESCRIPTION
                       "The sdlcCorePortOperGroup defines objects
                       which are common to the PortOper group of all
                       compliant link stations."
                   ::= { sdlcCoreGroups 5 }

sdlcCoreLSStatsGroup OBJECT-GROUP

                   OBJECTS
                   {
                       sdlcLSStatsBLUsIn,
                       sdlcLSStatsBLUsOut,
                       sdlcLSStatsOctetsIn,
                       sdlcLSStatsOctetsOut,
                       sdlcLSStatsPollsIn,
                       sdlcLSStatsPollsOut,
                       sdlcLSStatsPollRspsIn,
                       sdlcLSStatsPollRspsOut,
                       sdlcLSStatsLocalBusies,
                       sdlcLSStatsRemoteBusies,
                       sdlcLSStatsIFramesIn,
                       sdlcLSStatsIFramesOut,
                       sdlcLSStatsRetransmitsIn,
                       sdlcLSStatsRetransmitsOut,
                       sdlcLSStatsUIFramesIn,
                       sdlcLSStatsUIFramesOut,
                       sdlcLSStatsXIDsIn,
                       sdlcLSStatsXIDsOut,
                       sdlcLSStatsTESTsIn,
                       sdlcLSStatsTESTsOut,
                       sdlcLSStatsREJsIn,

Hilgeman, Nix, Bartky & Clark [Page 63] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                       sdlcLSStatsREJsOut,
                       sdlcLSStatsFRMRsIn,
                       sdlcLSStatsFRMRsOut,
                       sdlcLSStatsSIMsIn,
                       sdlcLSStatsSIMsOut,
                       sdlcLSStatsRIMsIn,
                       sdlcLSStatsRIMsOut,
                       sdlcLSStatsProtocolErrs,
                       sdlcLSStatsRNRLIMITs,
                       sdlcLSStatsRetriesExps
                   }
                   STATUS current
                   DESCRIPTION
                       "The sdlcCorePortStatsGroup defines objects
                       which are common to the PortStats group of all
                       compliant link stations."
                   ::= { sdlcCoreGroups 6 }

– – Conformance Groups for Primary Link Stations –

sdlcPrimaryGroups OBJECT IDENTIFIER ::= { sdlcGroups 2 }

sdlcPrimaryGroup OBJECT-GROUP

                   OBJECTS
                   {
                       sdlcPortAdminPAUSE,
                       sdlcPortOperPAUSE,
                       sdlcLSAdminREPLYTO,
                       sdlcLSOperREPLYTO
                   }
                   STATUS current
                   DESCRIPTION
                       "The sdlcPrimaryGroup defines objects which
                       are common to all compliant primary link
                       stations."
                   ::= { sdlcPrimaryGroups 1 }

sdlcPrimaryMultipointGroup OBJECT-GROUP

                   OBJECTS
                   {
                       sdlcPortAdminSERVLIM,
                       sdlcPortAdminSlowPollTimer,
                       sdlcPortOperSlowPollMethod,
                       sdlcPortOperSERVLIM,
                       sdlcPortOperSlowPollTimer

Hilgeman, Nix, Bartky & Clark [Page 64] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

                   }
                   STATUS current
                   DESCRIPTION
                       "The sdlcPrimaryMultipointGroup defines objects
                       which are common to all compliant primary link
                       stations that are in a multipoint topology."
                   ::= { sdlcPrimaryGroups 2 }

END

4. Acknowledgments

 Thanks goes to the SNADLC MIB working group for reviewing this MIB
 and for their infinite patience through the editing process.

5. References

 [1] Stewart, B., "Definitions of Managed Objects for RS-232-like
     Hardware Devices using SMIv2", RFC 1659, Xyplex, July 1994.
 [2] "Synchronous Data Link Control: Concepts", IBM Publication No.
     GA27-3093-04, 5th edition, May 1992.
 [3] "Vocabulary for Data Processing Telecommunications, and Office
     Systems", IBM Publication No. GC20-1699-6.
 [4] Kostick, D., Kielczewski, Z., and K. Shih, Editors, "Definitions
     of Managed Objects for SNA NAUs using SMIv2", RFC 1666, Eicon
     Technology Corporation, Bell Communications Research, Novell,
     August 1994.
 [5] Waldbusser, S., "Row Creation with SNMPv1", Work in Progress.
 [6] McCloghrie K., and F. Kastenholz, "Evolution of the Interfaces
     Group of MIB-II", RFC 1573, Hughes LAN Syst, FTP Software,
     January 1994.

Hilgeman, Nix, Bartky & Clark [Page 65] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

6. Glossary

   link station
       A link station comprises procedures and control information
       that coordinate the transfer of data between two nodes joined
       by a link connection.  All traffic over the link connection is
       from the primary link station to one or more secondary link
       stations, or from a secondary link station to the primary link
       station.
   primary link station
       The link station instance on a link connection that is
       responsible for the control of the data link.  There must be
       only one primary link station on a link connection.  The
       primary link station issues commands to one or more secondary
       link stations.
   secondary link station
       The link station instance on a link connection that receives
       commands from the primary link station and issues responses to
       it.
   switched line
       A telecommunications line in which the connection is
       established by dialing.  For switched lines, the SDLC startup
       sequence typically begins with a null exchange identifier (null
       XID).
   leased line
       A telecommunications line on which connections do not have to
       be established by dialing.  For leased lines, the SDLC startup
       sequence may or may not begin with an exchange identifer (XID).
       While there are interface (e.g., RS.232) differences between
       leased and switched lines, those interface differences do not
       map one-to-one with differences in the SDLC startup protocol
       (i.e., the interface and the SDLC protocol are independent from
       one another).
   point-to-point link
       A link that connects the single primary link station to single
       secondary link station.  A point-to-point link may be either
       switched or leased.
   multipoint link
       A link that connects the single primary link station to several
       secondary link stations.  A multipoint link may be either
       switched or leased.  Note: The physical interface signals for a
       multipoint link are different than for a point-to-point link.

Hilgeman, Nix, Bartky & Clark [Page 66] RFC 1747 SNADLC SDLC MIB using SMIv2 January 1995

       Synonymous with multidrop line.

7. Security Considerations

 Security issues are not discussed in this memo.

8. Authors' Addresses

 Jeff Hilgeman (chair)
 Apertus Technologies, Inc.
 7275 Flying Cloud Dr.
 Eden Prarie, MN  55344
 Phone: 1 612 828 0668
 EMail: jeffh@apertus.com
 Shannon D. Nix
 Metaplex, Inc.
 7412 Wingfoot Dr.
 Raleigh, NC  27615
 Phone: 1 919 878 0811
 EMail: snix@metaplex.com
 Alan Bartky
 Sync Research, Inc.
 7 Studebaker
 Irvine, CA  92718
 Phone: 1 714 588 2070
 EMail: alan@sync.com
 Wayne Clark (editor)
 cisco Systems, Inc.
 3100 Smoketree Ct.
 Suite 1000
 Raleigh, NC 27604
 Phone: 1 919 878 6958
 EMail: wclark@cisco.com

Hilgeman, Nix, Bartky & Clark [Page 67]

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