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rfc:rfc5519

Network Working Group J. Chesterfield Request for Comments: 5519 University of Cambridge Obsoletes: 2933, 3019 B. Haberman, Ed. Category: Standards Track JHU/APL

                                                            April 2009
              Multicast Group Membership Discovery MIB

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.

Copyright Notice

 Copyright (c) 2009 IETF Trust and the persons identified as the
 document authors.  All rights reserved.
 This document is subject to BCP 78 and the IETF Trust's Legal
 Provisions Relating to IETF Documents in effect on the date of
 publication of this document (http://trustee.ietf.org/license-info).
 Please review these documents carefully, as they describe your rights
 and restrictions with respect to this document.

Abstract

 This memo defines a portion of the Management Information Base (MIB)
 for use with network management protocols in the Internet community.
 In particular, it describes objects used for managing the Internet
 Group Management Protocol (IGMP) and the Multicast Listener Discovery
 (MLD) protocol.

Chesterfield & Haberman Standards Track [Page 1] RFC 5519 MGMD MIB April 2009

Table of Contents

 1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
 2.  The Internet-Standard Management Framework . . . . . . . . . .  2
 3.  Conventions  . . . . . . . . . . . . . . . . . . . . . . . . .  3
 4.  Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
 5.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . .  4
 6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 38
 7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 39
 8.  Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 39
 9.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 40
 10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 40
   10.1.  Normative References  . . . . . . . . . . . . . . . . . . 40
   10.2.  Informative References  . . . . . . . . . . . . . . . . . 41

1. Introduction

 This memo defines a portion of the Management Information Base (MIB)
 for use with network management protocols in the Internet community.
 In particular, it describes objects used for managing the Internet
 Group Management Protocol (IGMP) version 1 [RFC1112], version 2
 [RFC2236], or version 3 [RFC3376] and the Multicast Listener
 Discovery (MLD) protocol version 1 [RFC2710] or version 2 [RFC3810].
 Both protocols provide multicast membership discovery capability.
 IGMP pertains to IP version 4 clients, and MLD to IP version 6
 clients.  This version of the MIB obsoletes both RFC 2933 [RFC2933]
 and RFC 3019 [RFC3019], incorporating a generic interface for both
 IGMP and MLD implementations and incorporating changes to enable
 "source filtering" in multicast clients.  The MIB encompasses both
 router and host nodes with relevant management objects defined for
 each.

2. The Internet-Standard Management Framework

 For a detailed overview of the documents that describe the current
 Internet-Standard Management Framework, please refer to section 7 of
 RFC 3410 [RFC3410].
 Managed objects are accessed via a virtual information store, termed
 the Management Information Base or MIB.  MIB objects are generally
 accessed through the Simple Network Management Protocol (SNMP).
 Objects in the MIB are defined using the mechanisms defined in the
 Structure of Management Information (SMI).  This memo specifies a MIB
 module that is compliant to the SMIv2, which is described in STD 58,
 RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
 [RFC2580].

Chesterfield & Haberman Standards Track [Page 2] RFC 5519 MGMD MIB April 2009

3. Conventions

 The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
 "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
 document are to be interpreted as described in RFC 2119 [RFC2119].

4. Overview

 This Multicast Group Membership Discovery (MGMD) MIB module contains
 eight tables:
 1.  the MGMD Host Interface Table, which contains one row for each
     interface on which IGMP or MLD is enabled on a host,
 2.  the MGMD Router Interface Table, which contains one row for each
     interface on which MGMD is enabled on a router,
 3.  the MGMD Host Cache Table, which contains one row for each IP
     multicast group for which there are members on a particular
     interface on a host,
 4.  the MGMD Router Cache Table, which contains one row for each IP
     multicast group for which there are members on a particular
     interface on a router,
 5.  the reverse MGMD Host Table, which contains one row for each
     interface for which there are active multicast groups on a host,
 6.  the reverse MGMD Router Table, which contains one row for each
     interface for which there are active multicast groups on a
     router,
 7.  the MGMD HostSrcList Table, which contains one row for each entry
     in the source filter record for an interface and multicast group
     pair on a host, and
 8.  the MGMD RouterSrcList Table, which contains one row for each
     entry in the source filter record for an interface and multicast
     group pair on a router.
 All tables are intended for EITHER router OR host functionality as
 indicated by the name and corresponding description, although it is
 anticipated that there will be scenarios where both terms might apply
 to a device, e.g., a router that joins a multicast group also as a
 host for measurement purposes.  The source list tables provide an
 extension to the cache tables to indicate the source-specific

Chesterfield & Haberman Standards Track [Page 3] RFC 5519 MGMD MIB April 2009

 includes or excludes associated with each IP multicast group on each
 specific interface.  This functionality is only supported in IGMPv3-
 and MLDv2-capable nodes.
 Incorporated within the MGMD MIB tables are objects for the
 management of IGMP and MLD proxy devices as described in RFC 4605
 [RFC4605].  Proxy devices can be used in simple topologies where it
 is not necessary to run a full multicast routing protocol.  A proxy
 device can make forwarding decisions based on IGMP or MLD group
 membership activity.
 The MIB references InterfaceIndex and InterfaceIndexOrZero objects as
 defined in RFC 2863 [RFC2863], the MIB that describes generic objects
 for network interface sub-layers.
 Extensive references to the InetAddress and InetAddressType objects
 are made as defined in RFC 4001 [RFC4001].

5. Definitions

MGMD-STD-MIB DEFINITIONS ::= BEGIN

IMPORTS

  MODULE-IDENTITY, OBJECT-TYPE, mib-2, Counter32, Gauge32,
  Unsigned32, TimeTicks            FROM SNMPv2-SMI
  InetAddress, InetAddressType     FROM INET-ADDRESS-MIB
  RowStatus                        FROM SNMPv2-TC
  MODULE-COMPLIANCE, OBJECT-GROUP  FROM SNMPv2-CONF
  InterfaceIndexOrZero,
  InterfaceIndex                   FROM IF-MIB;

mgmdStdMIB MODULE-IDENTITY

  LAST-UPDATED "200903300000Z" -- March 30, 2009
  ORGANIZATION "INTERNET ENGINEERING TASK FORCE MULTICAST and
  ANYCAST GROUP MEMBERSHIP Working
      Group.
      www:   http://www.ietf.org/html.charters/magma-charter.html
      EMail: magma@ietf.org"
  CONTACT-INFO
      "Julian Chesterfield
      University of Cambridge,
      Computer Laboratory,
      15 JJ Thompson Avenue,
      Cambridge,
      CB3 0FD
      UK
      EMail: julian.chesterfield@cl.cam.ac.uk"

Chesterfield & Haberman Standards Track [Page 4] RFC 5519 MGMD MIB April 2009

  DESCRIPTION
      "The MIB module for MGMD management.
      A new version of MGMD combining RFC 2933 and RFC 3019.
      Includes IGMPv3 and MLDv2 source filtering changes.
      Copyright (c) 2009 IETF Trust and the persons
      identified as authors of the code.  All rights reserved.
      Redistribution and use in source and binary forms, with or
      without modification, are permitted provided that the
      following conditions are met:
  1. Redistributions of source code must retain the above copyright

notice, this list of conditions and the following disclaimer.

  1. Redistributions in binary form must reproduce the above

copyright notice, this list of conditions and the following

        disclaimer in the documentation and/or other materials
        provided with the distribution.
  1. Neither the name of Internet Society, IETF or IETF Trust,

nor the names of specific contributors, may be used to endorse

        or promote products derived from this software without
        specific prior written permission.
      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
      CONTRIBUTORS 'AS IS' AND ANY EXPRESS OR IMPLIED WARRANTIES,
      INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
      MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
      DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
      CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
      LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
      CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
      OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
      EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      This version of this MIB module is part of RFC 5519;
      see the RFC itself for full legal notices."
  REVISION "200903300000Z" -- March 30, 2009
  DESCRIPTION
      "This MIB obsoletes both RFC 2933 and RFC 3019."
  ::= { mib-2 185 }

Chesterfield & Haberman Standards Track [Page 5] RFC 5519 MGMD MIB April 2009

mgmdMIBObjects OBJECT IDENTIFIER ::= { mgmdStdMIB 1 }

– – The MGMD Host Interface Table –

mgmdHostInterfaceTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF MgmdHostInterfaceEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The (conceptual) table listing the interfaces on which
           IGMP or MLD is enabled."
  ::= { mgmdMIBObjects 1 }

mgmdHostInterfaceEntry OBJECT-TYPE

  SYNTAX     MgmdHostInterfaceEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "An entry (conceptual row) representing an interface on
          which IGMP or MLD is enabled."
  INDEX      { mgmdHostInterfaceIfIndex,
               mgmdHostInterfaceQuerierType }
  ::= { mgmdHostInterfaceTable 1 }

MgmdHostInterfaceEntry ::= SEQUENCE {

  mgmdHostInterfaceIfIndex               InterfaceIndex,
  mgmdHostInterfaceQuerierType           InetAddressType,
  mgmdHostInterfaceQuerier               InetAddress,
  mgmdHostInterfaceStatus                RowStatus,
  mgmdHostInterfaceVersion               Unsigned32,
  mgmdHostInterfaceVersion1QuerierTimer  TimeTicks,
  mgmdHostInterfaceVersion2QuerierTimer  TimeTicks,
  mgmdHostInterfaceVersion3Robustness    Unsigned32

}

mgmdHostInterfaceIfIndex OBJECT-TYPE

  SYNTAX     InterfaceIndex
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The ifIndex value of the interface for which IGMP or MLD is
           enabled.  The table is indexed by the ifIndex value and the
           InetAddressType to allow for interfaces that may be
           configured in both IPv4 and IPv6 modes."

Chesterfield & Haberman Standards Track [Page 6] RFC 5519 MGMD MIB April 2009

  ::= { mgmdHostInterfaceEntry 1 }

mgmdHostInterfaceQuerierType OBJECT-TYPE

  SYNTAX     InetAddressType { ipv4(1), ipv6(2) }
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The address type of this interface.  This entry along with
           the ifIndex value acts as an index to the mgmdHostInterface
           table.  A physical interface may be configured in multiple
           modes concurrently, e.g., in IPv4 and IPv6 modes connected
           to the same interface; however, the traffic is considered
           to be logically separate."
  ::= { mgmdHostInterfaceEntry 2 }

mgmdHostInterfaceQuerier OBJECT-TYPE

  SYNTAX     InetAddress (SIZE(4|16))
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The address of the IGMP or MLD Querier on the IP subnet to
           which this interface is attached.  The InetAddressType,
           e.g., IPv4 or IPv6, is identified by the
           mgmdHostInterfaceQuerierType variable in the
           mgmdHostInterface table."
  ::= { mgmdHostInterfaceEntry 3 }

mgmdHostInterfaceStatus OBJECT-TYPE

  SYNTAX     RowStatus
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
          "The activation of a row enables the host side of IGMP or
          MLD on the interface.  The destruction of a row disables
          the host side of IGMP or MLD on the interface."
  ::= { mgmdHostInterfaceEntry 4 }

mgmdHostInterfaceVersion OBJECT-TYPE

  SYNTAX     Unsigned32 (1..3)
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
          "The maximum version of MGMD that the host can run on
          this interface.  A value of 1 is only applicable for IPv4,
          and indicates that the host only supports IGMPv1 on the

Chesterfield & Haberman Standards Track [Page 7] RFC 5519 MGMD MIB April 2009

          interface.  A value of 2 indicates that the host also
          supports IGMPv2 (for IPv4) or MLDv1 (for IPv6).  A value of
          3 indicates that the host also supports IGMPv3 (for IPv4)
          or MLDv2 (for IPv6)."
  DEFVAL     { 3 }
  ::= { mgmdHostInterfaceEntry 5 }

mgmdHostInterfaceVersion1QuerierTimer OBJECT-TYPE

  SYNTAX     TimeTicks
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The time remaining until the host assumes that there are
          no IGMPv1 routers present on the interface.  While this is
          non-zero, the host will reply to all queries with version 1
          membership reports.  This variable applies to IGMPv2 or 3
          hosts that are forced to run in v1 for compatibility with
          v1 routers present on the interface.  This object may only
          be present when the corresponding value of
          mgmdHostInterfaceQuerierType is ipv4."
  REFERENCE "RFC 2236, Section 4 and RFC 3376, Section 7.2.1"
  DEFVAL     { 0 }
  ::= { mgmdHostInterfaceEntry 6 }

mgmdHostInterfaceVersion2QuerierTimer OBJECT-TYPE

  SYNTAX     TimeTicks
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The time remaining until the host assumes that there are
          no MGMDv2 routers present on the interface.  While this is
          non-zero, the host will reply to all queries with version 1
          or 2 membership reports.  This variable applies to MGMDv3
          hosts that are forced to run in v2 for compatibility with
          v2 hosts or routers present on the interface."
  REFERENCE "RFC 3376, Section 7.2.1 and RFC 3810, Section 8.2.1"
  DEFVAL     { 0 }
  ::= { mgmdHostInterfaceEntry 7 }

mgmdHostInterfaceVersion3Robustness OBJECT-TYPE

  SYNTAX     Unsigned32
  MAX-ACCESS read-create
  STATUS     current

Chesterfield & Haberman Standards Track [Page 8] RFC 5519 MGMD MIB April 2009

  DESCRIPTION
          "The robustness variable utilised by an MGMDv3 host in
          sending state-change reports for multicast routers.  To
          ensure the state-change report is not missed, the host
          retransmits the state-change report
          [mgmdHostInterfaceVersion3Robustness - 1] times.  The
          variable must be a non-zero value."
  REFERENCE "RFC 3376, Section 8.1 and RFC 3810, Section 9.14.1"
  DEFVAL     { 2 }
  ::= { mgmdHostInterfaceEntry 8 }

– – The MGMD Router Interface Table –

mgmdRouterInterfaceTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF MgmdRouterInterfaceEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The (conceptual) table listing the interfaces on which
          IGMP or MLD is enabled."
  ::= { mgmdMIBObjects 2 }

mgmdRouterInterfaceEntry OBJECT-TYPE

  SYNTAX     MgmdRouterInterfaceEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "An entry (conceptual row) representing an interface on
          which IGMP or MLD is enabled."
  INDEX      { mgmdRouterInterfaceIfIndex,
               mgmdRouterInterfaceQuerierType }
  ::= { mgmdRouterInterfaceTable 1 }

MgmdRouterInterfaceEntry ::= SEQUENCE {

  mgmdRouterInterfaceIfIndex                 InterfaceIndex,
  mgmdRouterInterfaceQuerierType             InetAddressType,
  mgmdRouterInterfaceQuerier                 InetAddress,
  mgmdRouterInterfaceQueryInterval           Unsigned32,
  mgmdRouterInterfaceStatus                  RowStatus,
  mgmdRouterInterfaceVersion                 Unsigned32,
  mgmdRouterInterfaceQueryMaxResponseTime    Unsigned32,
  mgmdRouterInterfaceQuerierUpTime           TimeTicks,
  mgmdRouterInterfaceQuerierExpiryTime       TimeTicks,

Chesterfield & Haberman Standards Track [Page 9] RFC 5519 MGMD MIB April 2009

  mgmdRouterInterfaceWrongVersionQueries     Counter32,
  mgmdRouterInterfaceJoins                   Counter32,
  mgmdRouterInterfaceProxyIfIndex            InterfaceIndexOrZero,
  mgmdRouterInterfaceGroups                  Gauge32,
  mgmdRouterInterfaceRobustness              Unsigned32,
  mgmdRouterInterfaceLastMemberQueryInterval Unsigned32,
  mgmdRouterInterfaceLastMemberQueryCount    Unsigned32,
  mgmdRouterInterfaceStartupQueryCount       Unsigned32,
  mgmdRouterInterfaceStartupQueryInterval    Unsigned32

}

mgmdRouterInterfaceIfIndex OBJECT-TYPE

  SYNTAX     InterfaceIndex
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The ifIndex value of the interface for which IGMP or MLD
          is enabled.  The table is indexed by the ifIndex value and
          the InetAddressType to allow for interfaces that may be
          configured in both IPv4 and IPv6 modes."
  ::= { mgmdRouterInterfaceEntry 1 }

mgmdRouterInterfaceQuerierType OBJECT-TYPE

  SYNTAX     InetAddressType { ipv4(1), ipv6(2) }
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The address type of this interface.  This entry along with
          the ifIndex value acts as the index to the
          mgmdRouterInterface table.  A physical interface may be
          configured in multiple modes concurrently, e.g., in IPv4
          and IPv6 modes connected to the same interface; however,
          the traffic is considered to be logically separate."
  ::= { mgmdRouterInterfaceEntry 2 }

mgmdRouterInterfaceQuerier OBJECT-TYPE

  SYNTAX     InetAddress (SIZE(4|16))
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The address of the IGMP or MLD Querier on the IP subnet to
          which this interface is attached.  The InetAddressType,
          e.g., IPv4 or IPv6, is identified by the
          mgmdRouterInterfaceQuerierType variable in the
          mgmdRouterInterface table."

Chesterfield & Haberman Standards Track [Page 10] RFC 5519 MGMD MIB April 2009

  ::= { mgmdRouterInterfaceEntry 3 }

mgmdRouterInterfaceQueryInterval OBJECT-TYPE

  SYNTAX     Unsigned32 (1..31744)
  UNITS      "seconds"
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
          "The frequency at which IGMP or MLD Host-Query packets are
          transmitted on this interface."
  DEFVAL     { 125 }
  ::= { mgmdRouterInterfaceEntry 4 }

mgmdRouterInterfaceStatus OBJECT-TYPE

  SYNTAX     RowStatus
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
          "The activation of a row enables the router side of IGMP or
          MLD on the interface.  The destruction of a row disables
          the router side of IGMP or MLD on the interface."
  ::= { mgmdRouterInterfaceEntry 5 }

mgmdRouterInterfaceVersion OBJECT-TYPE

  SYNTAX     Unsigned32 (1..3)
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
          "The version of MGMD that is running on this interface.
          Value 1 applies to IGMPv1 routers only.  Value 2 applies
          to IGMPv2 and MLDv1 routers, and value 3 applies to IGMPv3
          and MLDv2 routers.
          This object can be used to configure a router capable of
          running either version.  For IGMP and MLD to function
          correctly, all routers on a LAN must be configured to run
          the same version on that LAN."
  DEFVAL     { 3 }
  ::= { mgmdRouterInterfaceEntry 6 }

mgmdRouterInterfaceQueryMaxResponseTime OBJECT-TYPE

  SYNTAX     Unsigned32  (0..31744)
  UNITS      "tenths of seconds"
  MAX-ACCESS read-create
  STATUS     current

Chesterfield & Haberman Standards Track [Page 11] RFC 5519 MGMD MIB April 2009

  DESCRIPTION
          "The maximum query response interval advertised in MGMDv2
          or IGMPv3 queries on this interface."
  REFERENCE "RFC 3810, Section 9.3"
  DEFVAL     { 100 }
  ::= { mgmdRouterInterfaceEntry 7 }

mgmdRouterInterfaceQuerierUpTime OBJECT-TYPE

  SYNTAX     TimeTicks
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The time since mgmdRouterInterfaceQuerier was last
          changed."
  ::= { mgmdRouterInterfaceEntry 8 }

mgmdRouterInterfaceQuerierExpiryTime OBJECT-TYPE

  SYNTAX     TimeTicks
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The amount of time remaining before the Other Querier
          Present Timer expires.  If the local system is the querier,
          the value of this object is zero."
  ::= { mgmdRouterInterfaceEntry 9 }

mgmdRouterInterfaceWrongVersionQueries OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The number of general queries received whose IGMP or MLD
          version does not match the equivalent
          mgmdRouterInterfaceVersion, over the lifetime of the row
          entry.  Both IGMP and MLD require that all routers on a LAN
          be configured to run the same version.  Thus, if any general
          queries are received with the wrong version, this indicates
          a configuration error."
  ::= { mgmdRouterInterfaceEntry 10 }

mgmdRouterInterfaceJoins OBJECT-TYPE

  SYNTAX     Counter32
  MAX-ACCESS read-only

Chesterfield & Haberman Standards Track [Page 12] RFC 5519 MGMD MIB April 2009

  STATUS     current
  DESCRIPTION
          "The number of times a group membership has been added on
          this interface, that is, the number of times an entry for
          this interface has been added to the Cache Table.  This
          object can give an indication of the amount of activity
          between samples over time."
  ::= { mgmdRouterInterfaceEntry 11 }

mgmdRouterInterfaceProxyIfIndex OBJECT-TYPE

  SYNTAX     InterfaceIndexOrZero
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
          "Some devices implement a form of IGMP or MLD proxying
          whereby memberships learned on the interface represented by
          this row cause Host Membership Reports to be sent on the
          interface whose ifIndex value is given by this object.
          Such a device would implement the mgmdV2RouterBaseMIBGroup
          only on its router interfaces (those interfaces with
          non-zero mgmdRouterInterfaceProxyIfIndex).  Typically, the
          value of this object is 0, indicating that no proxying is
          being done."
  DEFVAL     { 0 }
  ::= { mgmdRouterInterfaceEntry 12 }

mgmdRouterInterfaceGroups OBJECT-TYPE

  SYNTAX     Gauge32
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The current number of entries for this interface in the
          mgmdRouterCacheTable."
  ::= { mgmdRouterInterfaceEntry 13 }

mgmdRouterInterfaceRobustness OBJECT-TYPE

  SYNTAX     Unsigned32 (1..255)
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
          "The Robustness Variable allows tuning for the expected
          packet loss on a subnet.  If a subnet is expected to be
          lossy, the Robustness Variable may be increased.  IGMP and
          MLD are robust to (Robustness Variable-1) packet losses."
  DEFVAL     { 2 }

Chesterfield & Haberman Standards Track [Page 13] RFC 5519 MGMD MIB April 2009

  ::= { mgmdRouterInterfaceEntry 14 }

mgmdRouterInterfaceLastMemberQueryInterval OBJECT-TYPE

  SYNTAX     Unsigned32  (0..31744)
  UNITS      "tenths of seconds"
  MAX-ACCESS read-create
  STATUS     current
  DESCRIPTION
          "The Last Member Query Interval is the Max Query Response
          Interval inserted into group-specific queries sent in
          response to leave group messages, and is also the amount
          of time between group-specific query messages.  This value
          may be tuned to modify the leave latency of the network.  A
          reduced value results in reduced time to detect the loss of
          the last member of a group.  The value of this object is
          irrelevant if mgmdRouterInterfaceVersion is 1."
  DEFVAL     { 10 }
  ::= { mgmdRouterInterfaceEntry 15 }

mgmdRouterInterfaceLastMemberQueryCount OBJECT-TYPE

  SYNTAX     Unsigned32 (1..255)
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "Represents the number of group-specific and group-and-
          source-specific queries sent by the router before it assumes
          there are no local members."
  ::= { mgmdRouterInterfaceEntry 16 }

mgmdRouterInterfaceStartupQueryCount OBJECT-TYPE

  SYNTAX     Unsigned32 (1..255)
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "Represents the number of Queries sent out on startup,
          separated by the Startup Query Interval."
  ::= { mgmdRouterInterfaceEntry 17 }

mgmdRouterInterfaceStartupQueryInterval OBJECT-TYPE

  SYNTAX     Unsigned32 (0..31744)
  UNITS      "seconds"
  MAX-ACCESS read-only
  STATUS     current

Chesterfield & Haberman Standards Track [Page 14] RFC 5519 MGMD MIB April 2009

  DESCRIPTION
          "This variable represents the interval between General
          Queries sent by a Querier on startup."
  ::= { mgmdRouterInterfaceEntry 18 }

– – The MGMD Host Cache Table –

mgmdHostCacheTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF MgmdHostCacheEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The (conceptual) table listing the IP multicast groups for
           which the host is a member on a particular interface."
  ::= { mgmdMIBObjects 3 }

mgmdHostCacheEntry OBJECT-TYPE

  SYNTAX     MgmdHostCacheEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "An entry (conceptual row) in the mgmdHostCacheTable."
  INDEX      { mgmdHostCacheAddressType, mgmdHostCacheAddress,
               mgmdHostCacheIfIndex }
  ::= { mgmdHostCacheTable 1 }

MgmdHostCacheEntry ::= SEQUENCE {

  mgmdHostCacheAddressType        InetAddressType,
  mgmdHostCacheAddress            InetAddress ,
  mgmdHostCacheIfIndex            InterfaceIndex,
  mgmdHostCacheUpTime             TimeTicks,
  mgmdHostCacheLastReporter       InetAddress,
  mgmdHostCacheSourceFilterMode   INTEGER

}

mgmdHostCacheAddressType OBJECT-TYPE

  SYNTAX     InetAddressType { ipv4(1), ipv6(2) }
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The address type of the mgmdHostCacheTable entry.  This
          value applies to both the mgmdHostCacheAddress and the
          mgmdHostCacheLastReporter entries."

Chesterfield & Haberman Standards Track [Page 15] RFC 5519 MGMD MIB April 2009

  ::= { mgmdHostCacheEntry 1 }

mgmdHostCacheAddress OBJECT-TYPE

  SYNTAX      InetAddress (SIZE(4|16))
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The IP multicast group address for which this entry
          contains information.  The InetAddressType, e.g., IPv4 or
          IPv6, is identified by the mgmdHostCacheAddressType variable
          in the mgmdHostCache table."
  ::= { mgmdHostCacheEntry 2 }

mgmdHostCacheIfIndex OBJECT-TYPE

  SYNTAX     InterfaceIndex
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The interface for which this entry contains information
          for an IP multicast group address."
  ::= { mgmdHostCacheEntry 3 }

mgmdHostCacheUpTime OBJECT-TYPE

  SYNTAX     TimeTicks
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The time elapsed since this entry was created."
  ::= { mgmdHostCacheEntry 4 }

mgmdHostCacheLastReporter OBJECT-TYPE

  SYNTAX     InetAddress (SIZE(4|16))
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The IP address of the source of the last membership report
          received for this IP multicast group address on this
          interface.  If no membership report has been received, this
          object has a value of 0.  The InetAddressType, e.g., IPv4 or
          IPv6, is identified by the mgmdHostCacheAddressType variable
          in the mgmdHostCache table."
  ::= { mgmdHostCacheEntry 5 }

mgmdHostCacheSourceFilterMode OBJECT-TYPE

Chesterfield & Haberman Standards Track [Page 16] RFC 5519 MGMD MIB April 2009

  SYNTAX     INTEGER {include (1),
                      exclude (2) }
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The state in which the interface is currently set.  The
          value indicates the relevance of the corresponding source
          list entries in the mgmdHostSecListTable for MGMDv3
          interfaces."
  ::= { mgmdHostCacheEntry 6 }

– – The MGMD Router Cache Table –

mgmdRouterCacheTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF MgmdRouterCacheEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The (conceptual) table listing the IP multicast groups for
          which there are members on a particular router interface."
  ::= { mgmdMIBObjects 4 }

mgmdRouterCacheEntry OBJECT-TYPE

  SYNTAX     MgmdRouterCacheEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "An entry (conceptual row) in the mgmdRouterCacheTable."
  INDEX      { mgmdRouterCacheAddressType, mgmdRouterCacheAddress,
               mgmdRouterCacheIfIndex }
  ::= { mgmdRouterCacheTable 1 }

MgmdRouterCacheEntry ::= SEQUENCE {

  mgmdRouterCacheAddressType        InetAddressType,
  mgmdRouterCacheAddress            InetAddress,
  mgmdRouterCacheIfIndex            InterfaceIndex,
  mgmdRouterCacheLastReporter       InetAddress,
  mgmdRouterCacheUpTime             TimeTicks,
  mgmdRouterCacheExpiryTime         TimeTicks,
  mgmdRouterCacheExcludeModeExpiryTimer
                                    TimeTicks,
  mgmdRouterCacheVersion1HostTimer  TimeTicks,

Chesterfield & Haberman Standards Track [Page 17] RFC 5519 MGMD MIB April 2009

  mgmdRouterCacheVersion2HostTimer  TimeTicks,
  mgmdRouterCacheSourceFilterMode   INTEGER

}

mgmdRouterCacheAddressType OBJECT-TYPE

  SYNTAX     InetAddressType { ipv4(1), ipv6(2) }
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The address type of the mgmdRouterCacheTable entry.  This
          value applies to both the mgmdRouterCacheAddress and the
          mgmdRouterCacheLastReporter entries."
  ::= { mgmdRouterCacheEntry 1 }

mgmdRouterCacheAddress OBJECT-TYPE

  SYNTAX      InetAddress (SIZE(4|16))
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The IP multicast group address for which this entry
          contains information.  The InetAddressType, e.g., IPv4 or
          IPv6, is identified by the mgmdRouterCacheAddressType
          variable in the mgmdRouterCache table."
  ::= { mgmdRouterCacheEntry 2 }

mgmdRouterCacheIfIndex OBJECT-TYPE

  SYNTAX     InterfaceIndex
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The interface for which this entry contains information
          for an IP multicast group address."
  ::= { mgmdRouterCacheEntry 3 }

mgmdRouterCacheLastReporter OBJECT-TYPE

  SYNTAX     InetAddress (SIZE(4|16))
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The IP address of the source of the last membership report
          received for this IP multicast group address on this
          interface.  If no membership report has been received, this
          object has the value 0.  The InetAddressType, e.g., IPv4 or
          IPv6, is identified by the mgmdRouterCacheAddressType
          variable in the mgmdRouterCache table."

Chesterfield & Haberman Standards Track [Page 18] RFC 5519 MGMD MIB April 2009

  ::= { mgmdRouterCacheEntry 4 }

mgmdRouterCacheUpTime OBJECT-TYPE

  SYNTAX     TimeTicks
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The time elapsed since this entry was created."
  ::= { mgmdRouterCacheEntry 5 }

mgmdRouterCacheExpiryTime OBJECT-TYPE

  SYNTAX     TimeTicks
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "This value represents the time remaining before the Group
          Membership Interval state expires.  The value must always be
          greater than or equal to 1."
  ::= { mgmdRouterCacheEntry 6 }

mgmdRouterCacheExcludeModeExpiryTimer OBJECT-TYPE

  SYNTAX     TimeTicks
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "This value is applicable only to MGMDv3-compatible nodes
          and represents the time remaining before the interface
          EXCLUDE state expires and the interface state transitions
          to INCLUDE mode.  This value can never be greater than
          mgmdRouterCacheExpiryTime."
  ::= { mgmdRouterCacheEntry 7 }

mgmdRouterCacheVersion1HostTimer OBJECT-TYPE

  SYNTAX     TimeTicks
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The time remaining until the local router will assume that
          there are no longer any MGMD version 1 members on the IP
          subnet attached to this interface.  This entry only applies
          to IGMPv1 hosts, and is not implemented for MLD.  Upon
          hearing any MGMDv1 Membership Report (IGMPv1 only), this
          value is reset to the group membership timer.  While this

Chesterfield & Haberman Standards Track [Page 19] RFC 5519 MGMD MIB April 2009

          time remaining is non-zero, the local router ignores any
          MGMDv2 Leave messages (IGMPv2 only) for this group that it
          receives on this interface."
  ::= { mgmdRouterCacheEntry 8 }

mgmdRouterCacheVersion2HostTimer OBJECT-TYPE

  SYNTAX     TimeTicks
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The time remaining until the local router will assume that
          there are no longer any MGMD version 2 members on the IP
          subnet attached to this interface.  This entry applies to
          both IGMP and MLD hosts.  Upon hearing any MGMDv2 Membership
          Report, this value is reset to the group membership timer.
          Assuming no MGMDv1 hosts have been detected, the local
          router does not ignore any MGMDv2 Leave messages for this
          group that it receives on this interface."
  ::= { mgmdRouterCacheEntry 9 }

mgmdRouterCacheSourceFilterMode OBJECT-TYPE

  SYNTAX     INTEGER {include (1),
                      exclude (2) }
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The current cache state, applicable to MGMDv3-compatible
          nodes.  The value indicates whether the state is INCLUDE or
          EXCLUDE."
  ::= { mgmdRouterCacheEntry 10 }

– – The MGMD Inverse Host interface/cache lookup Table –

mgmdInverseHostCacheTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF MgmdInverseHostCacheEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The (conceptual) table listing the interfaces that are
          members of a particular group.  This is an inverse lookup
          table for entries in the mgmdHostCacheTable."
  ::= { mgmdMIBObjects 5 }

Chesterfield & Haberman Standards Track [Page 20] RFC 5519 MGMD MIB April 2009

mgmdInverseHostCacheEntry OBJECT-TYPE

  SYNTAX     MgmdInverseHostCacheEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "An entry (conceptual row) in the
          mgmdInverseHostCacheTable."
  INDEX      { mgmdInverseHostCacheIfIndex,
               mgmdInverseHostCacheAddressType,
               mgmdInverseHostCacheAddress}
  ::= { mgmdInverseHostCacheTable 1 }

MgmdInverseHostCacheEntry ::= SEQUENCE {

  mgmdInverseHostCacheIfIndex            InterfaceIndex,
  mgmdInverseHostCacheAddressType        InetAddressType,
  mgmdInverseHostCacheAddress            InetAddress

}

mgmdInverseHostCacheIfIndex OBJECT-TYPE

  SYNTAX     InterfaceIndex
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The interface for which this entry contains information."
  ::= { mgmdInverseHostCacheEntry 1 }

mgmdInverseHostCacheAddressType OBJECT-TYPE

  SYNTAX     InetAddressType { ipv4(1), ipv6(2) }
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The address type of the mgmdInverseHostCacheTable entry."
  ::= { mgmdInverseHostCacheEntry 2 }

mgmdInverseHostCacheAddress OBJECT-TYPE

  SYNTAX      InetAddress (SIZE(4|16))
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The IP multicast group address for which this entry
          contains information about an interface.  The
          InetAddressType, e.g., IPv4 or IPv6, is identified by the
          mgmdInverseHostCacheAddressType variable in the
          mgmdInverseHostCache table."

Chesterfield & Haberman Standards Track [Page 21] RFC 5519 MGMD MIB April 2009

  ::= { mgmdInverseHostCacheEntry 3 }

– – The MGMD Inverse Router interface/cache lookup Table –

mgmdInverseRouterCacheTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF MgmdInverseRouterCacheEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The (conceptual) table listing the interfaces that
          are members of a particular group.  This is an inverse
          lookup table for entries in the mgmdRouterCacheTable."
  ::= { mgmdMIBObjects 6 }

mgmdInverseRouterCacheEntry OBJECT-TYPE

  SYNTAX     MgmdInverseRouterCacheEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "An entry (conceptual row) in the
          mgmdInverseRouterCacheTable."
  INDEX      { mgmdInverseRouterCacheIfIndex,
               mgmdInverseRouterCacheAddressType,
               mgmdInverseRouterCacheAddress }
  ::= { mgmdInverseRouterCacheTable 1 }

MgmdInverseRouterCacheEntry ::= SEQUENCE {

  mgmdInverseRouterCacheIfIndex            InterfaceIndex,
  mgmdInverseRouterCacheAddressType        InetAddressType,
  mgmdInverseRouterCacheAddress            InetAddress

}

mgmdInverseRouterCacheIfIndex OBJECT-TYPE

  SYNTAX     InterfaceIndex
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The interface for which this entry contains information
          for an IP multicast group address."
  ::= { mgmdInverseRouterCacheEntry 1 }

mgmdInverseRouterCacheAddressType OBJECT-TYPE

  SYNTAX     InetAddressType { ipv4(1), ipv6(2) }

Chesterfield & Haberman Standards Track [Page 22] RFC 5519 MGMD MIB April 2009

  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The address type of the mgmdInverseRouterCacheTable entry."
  ::= { mgmdInverseRouterCacheEntry 2 }

mgmdInverseRouterCacheAddress OBJECT-TYPE

  SYNTAX      InetAddress (SIZE(4|16))
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "The IP multicast group address for which this entry
          contains information.  The InetAddressType, e.g., IPv4 or
          IPv6, is identified by the mgmdInverseRouterCacheAddressType
          variable in the mgmdInverseRouterCache table."
  ::= { mgmdInverseRouterCacheEntry 3 }

– – The MGMD Host Source list Table –

mgmdHostSrcListTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF MgmdHostSrcListEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The (conceptual) table listing the Source List entries
           corresponding to each interface and multicast group pair
           on a host."
  ::= { mgmdMIBObjects 7 }

mgmdHostSrcListEntry OBJECT-TYPE

  SYNTAX     MgmdHostSrcListEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "An entry (conceptual row) in the mgmdHostSrcListTable."
  INDEX      { mgmdHostSrcListAddressType, mgmdHostSrcListAddress,
               mgmdHostSrcListIfIndex, mgmdHostSrcListHostAddress }
  ::= { mgmdHostSrcListTable 1 }

MgmdHostSrcListEntry ::= SEQUENCE {

  mgmdHostSrcListAddressType      InetAddressType,
  mgmdHostSrcListAddress          InetAddress,

Chesterfield & Haberman Standards Track [Page 23] RFC 5519 MGMD MIB April 2009

  mgmdHostSrcListIfIndex          InterfaceIndex,
  mgmdHostSrcListHostAddress      InetAddress,
  mgmdHostSrcListExpire           TimeTicks

}

mgmdHostSrcListAddressType OBJECT-TYPE

  SYNTAX     InetAddressType { ipv4(1), ipv6(2) }
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The address type of the InetAddress variables in this
          table.  This value applies to the mgmdHostSrcListHostAddress
          and mgmdHostSrcListAddress entries."
  ::= { mgmdHostSrcListEntry 1 }

mgmdHostSrcListAddress OBJECT-TYPE

  SYNTAX      InetAddress (SIZE(4|16))
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The IP multicast group address for which this entry
          contains information."
  ::= { mgmdHostSrcListEntry 2 }

mgmdHostSrcListIfIndex OBJECT-TYPE

  SYNTAX     InterfaceIndex
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The interface for which this entry contains information
          for an IP multicast group address."
  ::= { mgmdHostSrcListEntry 3 }

mgmdHostSrcListHostAddress OBJECT-TYPE

  SYNTAX      InetAddress (SIZE(4|16))
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The host address to which this entry corresponds.  The
          mgmdHostCacheSourceFilterMode value for this group address
          and interface indicates whether this host address is
          included or excluded."
  ::= { mgmdHostSrcListEntry 4 }

Chesterfield & Haberman Standards Track [Page 24] RFC 5519 MGMD MIB April 2009

mgmdHostSrcListExpire OBJECT-TYPE

  SYNTAX     TimeTicks
  MAX-ACCESS read-only
  STATUS     current
  DESCRIPTION
          "This value indicates the relevance of the SrcList entry,
          whereby a non-zero value indicates this is an INCLUDE state
          value, and a zero value indicates this to be an EXCLUDE
          state value."
  ::= { mgmdHostSrcListEntry 5 }

– – The MGMD Router Source list Table –

mgmdRouterSrcListTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF MgmdRouterSrcListEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The (conceptual) table listing the Source List entries
          corresponding to each interface and multicast group pair on
          a Router."
  ::= { mgmdMIBObjects 8 }

mgmdRouterSrcListEntry OBJECT-TYPE

  SYNTAX     MgmdRouterSrcListEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "An entry (conceptual row) in the mgmdRouterSrcListTable."
  INDEX      { mgmdRouterSrcListAddressType,
               mgmdRouterSrcListAddress,
               mgmdRouterSrcListIfIndex,
               mgmdRouterSrcListHostAddress }
  ::= { mgmdRouterSrcListTable 1 }

MgmdRouterSrcListEntry ::= SEQUENCE {

  mgmdRouterSrcListAddressType    InetAddressType,
  mgmdRouterSrcListAddress        InetAddress,
  mgmdRouterSrcListIfIndex        InterfaceIndex,
  mgmdRouterSrcListHostAddress    InetAddress,
  mgmdRouterSrcListExpire         TimeTicks

}

Chesterfield & Haberman Standards Track [Page 25] RFC 5519 MGMD MIB April 2009

mgmdRouterSrcListAddressType OBJECT-TYPE

  SYNTAX     InetAddressType { ipv4(1), ipv6(2) }
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The address type of the InetAddress variables in this
          table.  This value applies to the
          mgmdRouterSrcListHostAddress and mgmdRouterSrcListAddress
          entries."
  ::= { mgmdRouterSrcListEntry 1 }

mgmdRouterSrcListAddress OBJECT-TYPE

  SYNTAX      InetAddress (SIZE(4|16))
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The IP multicast group address for which this entry
          contains information."
  ::= { mgmdRouterSrcListEntry 2 }

mgmdRouterSrcListIfIndex OBJECT-TYPE

  SYNTAX     InterfaceIndex
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
          "The interface for which this entry contains information
          for an IP multicast group address."
  ::= { mgmdRouterSrcListEntry 3 }

mgmdRouterSrcListHostAddress OBJECT-TYPE

  SYNTAX      InetAddress (SIZE(4|16))
  MAX-ACCESS  not-accessible
  STATUS     current
  DESCRIPTION
          "The host address to which this entry corresponds.  The
          mgmdRouterCacheSourceFilterMode value for this group address
          and interface indicates whether this host address is
          included or excluded."
  ::= { mgmdRouterSrcListEntry 4 }

mgmdRouterSrcListExpire OBJECT-TYPE

  SYNTAX     TimeTicks
  MAX-ACCESS read-only
  STATUS     current

Chesterfield & Haberman Standards Track [Page 26] RFC 5519 MGMD MIB April 2009

  DESCRIPTION
          "This value indicates the relevance of the SrcList entry,
          whereby a non-zero value indicates this is an INCLUDE state
          value, and a zero value indicates this to be an EXCLUDE
          state value."
  ::= { mgmdRouterSrcListEntry 5 }

– conformance information

mgmdMIBConformance OBJECT IDENTIFIER ::= { mgmdStdMIB 2 } mgmdMIBCompliance OBJECT IDENTIFIER ::= { mgmdMIBConformance 1 } mgmdMIBGroups OBJECT IDENTIFIER ::= { mgmdMIBConformance 2 }

– Protocol Version Conformance

– Read Compliance statement for IGMPv1 Hosts – IGMPv1 only supports the IPv4 Address Family

mgmdIgmpV1HostReadMIBCompliance MODULE-COMPLIANCE

  STATUS  current
  DESCRIPTION
          "A read-only compliance statement for hosts running IGMPv1
          [RFC1112] and implementing the MGMD MIB.  IGMPv1 hosts must
          support the IPv4 address type."
  MODULE  -- this module
  MANDATORY-GROUPS { mgmdHostBaseMIBGroup }
  OBJECT mgmdHostInterfaceStatus
  SYNTAX RowStatus {active(1)}
  MIN-ACCESS read-only
  DESCRIPTION
          "Read-write or read-create access is not required and only
           the value 'active(1)' needs to be supported."
  OBJECT mgmdHostInterfaceVersion
  SYNTAX Unsigned32 (1)
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required.  Only version 1 needs to be
           supported."
  GROUP mgmdHostExtendedMIBGroup
  DESCRIPTION
          "Supporting this group can be especially useful in
           an environment with a router that does not support the
           MGMD MIB."

Chesterfield & Haberman Standards Track [Page 27] RFC 5519 MGMD MIB April 2009

  ::= { mgmdMIBCompliance 1 }

– Read Compliance statement for IGMPv1 Routers – IGMPv1 only supports the IPv4 Address Family

mgmdIgmpV1RouterReadMIBCompliance MODULE-COMPLIANCE

  STATUS  current
  DESCRIPTION
          "A read-only compliance statement for routers running
          IGMPv1 [RFC1112] and implementing the MGMD MIB.  IGMPv1
          routers only support the IPv4 address type.
          Non-accessible index objects that only need IPv4
          support are:
          OBJECT mgmdRouterCacheAddressType
          SYNTAX InetAddressType { ipv4(1) }
          OBJECT mgmdRouterCacheAddress
          SYNTAX InetAddress (SIZE(4))
          OBJECT mgmdRouterInterfaceQuerierType
          SYNTAX InetAddressType { ipv4(1) }
          OBJECT mgmdInverseRouterCacheAddressType
          SYNTAX InetAddressType { ipv4(1) }
          "
  MODULE  -- this module
  MANDATORY-GROUPS { mgmdRouterBaseMIBGroup }
  OBJECT mgmdRouterCacheLastReporter
  SYNTAX InetAddress (SIZE(4))
  DESCRIPTION
          "IGMPv1 routers only support IPv4 addresses."
  OBJECT mgmdRouterInterfaceQuerier
  SYNTAX InetAddress (SIZE(4))
  DESCRIPTION
          "IGMPv1 routers only support IPv4 addresses."
  OBJECT mgmdInverseRouterCacheAddress
  SYNTAX InetAddress (SIZE(4))
  DESCRIPTION
          "IGMPv1 routers only support IPv4 addresses."
  OBJECT mgmdRouterInterfaceVersion
  SYNTAX Unsigned32 (1)

Chesterfield & Haberman Standards Track [Page 28] RFC 5519 MGMD MIB April 2009

  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required.  Only version 1 needs to
           be supported."
  OBJECT mgmdRouterInterfaceStatus
  SYNTAX RowStatus {active(1)}
  MIN-ACCESS read-only
  DESCRIPTION
          "Read-write or read-create access is not required and only
           the value 'active(1)' needs to be supported."
  OBJECT mgmdRouterInterfaceQueryInterval
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required."
  ::= { mgmdMIBCompliance 2 }

– Write Compliance statement for IGMPv1 Routers – IGMPv1 only supports the IPv4 Address Family

mgmdIgmpV1RouterWriteMIBCompliance MODULE-COMPLIANCE

  STATUS  current
  DESCRIPTION
          "A read-create compliance statement for routers running
          IGMPv1 [RFC1112] and implementing the MGMD MIB.  IGMPv1
          routers only support the IPv4 address type.
          Non-accessible index objects that only need IPv4
          support are:
          OBJECT mgmdRouterCacheAddressType
          SYNTAX InetAddressType { ipv4(1) }
          OBJECT mgmdRouterCacheAddress
          SYNTAX InetAddress (SIZE(4))
          OBJECT mgmdRouterInterfaceQuerierType
          SYNTAX InetAddressType { ipv4(1) }
          OBJECT mgmdInverseRouterCacheAddressType
          SYNTAX InetAddressType { ipv4(1) }
          "
  MODULE  -- this module
  MANDATORY-GROUPS { mgmdRouterBaseMIBGroup }

Chesterfield & Haberman Standards Track [Page 29] RFC 5519 MGMD MIB April 2009

  OBJECT mgmdRouterCacheLastReporter
  SYNTAX InetAddress (SIZE(4))
  DESCRIPTION
          "Only IPv4 addresses needed for IGMPv1 router support."
  OBJECT mgmdRouterInterfaceQuerier
  SYNTAX InetAddress (SIZE(4))
  DESCRIPTION
          "Only IPv4 addresses needed for IGMPv1 router support."
  OBJECT mgmdInverseRouterCacheAddress
  SYNTAX InetAddress (SIZE(4))
  DESCRIPTION
          "Only IPv4 addresses needed for IGMPv1 router support."
  OBJECT mgmdRouterInterfaceVersion
  SYNTAX Unsigned32 (1)
  DESCRIPTION
          "Write access is not required.  Only version 1 needs to
           be supported."
  ::= { mgmdMIBCompliance 3 }

– Read Compliance statement for IGMPv2 and MLDv1 Hosts – IGMPv2 only supports the IPv4 Address Family – MLDv1 only supports the IPv6 Address Family

mgmdIgmpV2MldV1HostReadMIBCompliance MODULE-COMPLIANCE

  STATUS  current
  DESCRIPTION
          "A read-only compliance statement for hosts running IGMPv2
          [RFC2236] or MLDv1 [RFC2710] and implementing the MGMD
          MIB.  IGMPv2 hosts only support the IPv4 address type and
          MLDv1 hosts only support the IPv6 address type."
  MODULE  -- this module
  MANDATORY-GROUPS { mgmdHostBaseMIBGroup,
                     mgmdV2HostMIBGroup
                   }
  OBJECT mgmdHostInterfaceStatus
  SYNTAX RowStatus {active(1)}
  MIN-ACCESS read-only
  DESCRIPTION
          "Read-write or read-create access is not required and only
           the value 'active(1)' needs to be supported."
  OBJECT mgmdHostInterfaceVersion
  SYNTAX Unsigned32 (1..2)

Chesterfield & Haberman Standards Track [Page 30] RFC 5519 MGMD MIB April 2009

  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required.  Only versions 1 and 2 need
           to be supported."
  GROUP   mgmdHostExtendedMIBGroup
  DESCRIPTION
          "Supporting this group can be especially useful in an
           environment with a router that does not support the
           MGMD MIB."
  ::= { mgmdMIBCompliance 4 }

– Write Compliance statement for IGMPv2 and MLDv1 Hosts – IGMPv2 only supports the IPv4 Address Family – MLDv1 only supports the IPv6 Address Family

mgmdIgmpV2MldV1HostWriteMIBCompliance MODULE-COMPLIANCE

  STATUS  current
  DESCRIPTION
          "A read-create compliance statement for hosts running
          IGMPv2 [RFC2236] or MLDv1 [RFC2710] and implementing
          the MGMD MIB.  IGMPv2 hosts only support the IPv4 address
          type and MLDv1 hosts only support the IPv6 address type."
  MODULE  -- this module
  MANDATORY-GROUPS { mgmdHostBaseMIBGroup,
                     mgmdV2HostMIBGroup }
  OBJECT mgmdHostInterfaceVersion
  SYNTAX Unsigned32 (1..2)
  DESCRIPTION
          "Only versions 1 and 2 need to be supported."
  ::= { mgmdMIBCompliance 5 }

– Read Compliance statement for IGMPv2 and MLDv1 Routers – IGMPv2 only supports the IPv4 Address Family – MLDv1 only supports the IPv6 Address Family

mgmdIgmpV2MldV1RouterReadMIBCompliance MODULE-COMPLIANCE

  STATUS  current
  DESCRIPTION
          "A read-only compliance statement for routers running
          IGMPv2 [RFC2236] or MLDv1 [RFC2710] and implementing
          the MGMD MIB.  IGMPv2 routers only support the IPv4
          address type and MLDv1 routers only support the IPv6
          address type."
  MODULE  -- this module
  MANDATORY-GROUPS { mgmdRouterBaseMIBGroup,

Chesterfield & Haberman Standards Track [Page 31] RFC 5519 MGMD MIB April 2009

                     mgmdV2RouterBaseMIBGroup
                   }
  OBJECT mgmdRouterInterfaceLastMemberQueryInterval
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required."
  OBJECT mgmdRouterInterfaceRobustness
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required."
  OBJECT mgmdRouterInterfaceQueryMaxResponseTime
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required."
  OBJECT mgmdRouterInterfaceVersion
  SYNTAX Unsigned32 (1..2)
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required.  Only versions 1 and 2
           need to be supported."
  OBJECT mgmdRouterInterfaceStatus
  SYNTAX RowStatus {active(1)}
  MIN-ACCESS read-only
  DESCRIPTION
          "Read-write or read-create access is not required and only
           the value 'active(1)' needs to be supported."
  OBJECT mgmdRouterInterfaceQueryInterval
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required."
  GROUP   mgmdV2ProxyMIBGroup
  DESCRIPTION
          "Write access is not required."
  ::= { mgmdMIBCompliance 6 }

– Write Compliance statement for IGMPv2, IGMPv3, MLDv1, and MLDv2 – Routers – IGMPv2 and IGMPv3 only support the IPv4 Address Family – MLDv1 and MLDv2 only support the IPv6 Address Family

Chesterfield & Haberman Standards Track [Page 32] RFC 5519 MGMD MIB April 2009

mgmdIgmpV2V3MldV1V2RouterWriteMIBCompliance MODULE-COMPLIANCE

  STATUS  current
  DESCRIPTION
          "A read-create compliance statement for routers running
          IGMPv2 [RFC2236], IGMPv3 [RFC3376], MLDv1 [RFC2710], or
          MLDv2 [RFC3810] and implementing the MGMD MIB.  IGMPv2 and
          IGMPv3 routers only support the IPv4 address type, while
          MLDv1 and MLDv2 routers only support the IPv6 address type."
  MODULE  -- this module
  MANDATORY-GROUPS { mgmdRouterBaseMIBGroup,
                     mgmdV2RouterBaseMIBGroup
                   }
  GROUP   mgmdV2ProxyMIBGroup
  DESCRIPTION
          "Read-create access is required."
  ::= { mgmdMIBCompliance 7 }

– Read Compliance statement for IGMPv2, IGMPv3, MLDv1, and MLDv2 Hosts – IGMPv2 and IGMPv3 only support the IPv4 Address Family – MLDv1 and MLDv2 only support the IPv6 Address Family

mgmdIgmpV3MldV2HostReadMIBCompliance MODULE-COMPLIANCE

  STATUS  current
  DESCRIPTION
          "The compliance statement for hosts running IGMPv3
          [RFC3376] or MLDv2 [RFC3810] and implementing the
          MGMD MIB.  IGMPv3 hosts only support the IPv4 address
          type and MLDv2 hosts only support the IPv6 address type."
  MODULE  -- this module
  MANDATORY-GROUPS { mgmdHostBaseMIBGroup,
                     mgmdV2HostMIBGroup,
                     mgmdV3HostMIBGroup
                   }
  OBJECT mgmdHostInterfaceVersion
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required."
  OBJECT mgmdHostInterfaceStatus
  SYNTAX RowStatus {active(1)}
  MIN-ACCESS read-only
  DESCRIPTION
          "Read-write or read-create access is not required and only
           the value 'active(1)' needs to be supported."

Chesterfield & Haberman Standards Track [Page 33] RFC 5519 MGMD MIB April 2009

  OBJECT  mgmdHostInterfaceVersion3Robustness
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required."
  GROUP   mgmdHostExtendedMIBGroup
  DESCRIPTION
          "Supporting this group can be especially useful in
           an environment with a router that does not support the
           MGMD MIB."
  ::= { mgmdMIBCompliance 8 }

– Write Compliance statement for IGMPv2, IGMPv3, MLDv1, and MLDv2 Hosts – IGMPv2 and IGMPv3 only support the IPv4 Address Family – MLDv1 and MLDv2 only support the IPv6 Address Family

mgmdIgmpV3MldV2HostWriteMIBCompliance MODULE-COMPLIANCE

  STATUS  current
  DESCRIPTION
          "The compliance statement for hosts running IGMPv3
          [RFC3376] or MLDv2 [RFC3810] and implementing the
          MGMD MIB.  IGMPv3 hosts only support the IPv4 address
          type and MLDv2 hosts only support the IPv6 address type."
  MODULE  -- this module
  MANDATORY-GROUPS { mgmdHostBaseMIBGroup,
                     mgmdV2HostMIBGroup,
                     mgmdV3HostMIBGroup
                   }
  GROUP   mgmdHostExtendedMIBGroup
  DESCRIPTION
          "Supporting this group can be especially useful in
           an environment with a router that does not support the
           MGMD MIB."
  ::= { mgmdMIBCompliance 9 }

– Read Compliance statement for IGMPv2, IGMPv3, MLDv1, and MLDv2 – Routers – IGMPv2 and IGMPv3 only support the IPv4 Address Family – MLDv1 and MLDv2 only support the IPv6 Address Family

mgmdIgmpV3MldV2RouterReadMIBCompliance MODULE-COMPLIANCE

  STATUS  current

Chesterfield & Haberman Standards Track [Page 34] RFC 5519 MGMD MIB April 2009

  DESCRIPTION
          "A read-only compliance statement for routers running
          IGMPv3 [RFC3376] or MLDv2 [RFC3810] and implementing
          the MGMD MIB.  IGMPv3 routers only support the IPv4
          address type and MLDv2 routers only support the IPv6
          address type."
  MODULE  -- this module
  MANDATORY-GROUPS { mgmdRouterBaseMIBGroup,
                     mgmdV2RouterBaseMIBGroup,
                     mgmdV3RouterMIBGroup
                   }
  OBJECT mgmdRouterInterfaceLastMemberQueryInterval
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required."
  OBJECT mgmdRouterInterfaceRobustness
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required."
  OBJECT mgmdRouterInterfaceQueryMaxResponseTime
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required."
  OBJECT mgmdRouterInterfaceVersion
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required."
  OBJECT mgmdRouterInterfaceStatus
  SYNTAX RowStatus {active(1)}
  MIN-ACCESS read-only
  DESCRIPTION
          "Read-write or read-create access is not required and only
           the value 'active(1)' needs to be supported."
  OBJECT mgmdRouterInterfaceQueryInterval
  MIN-ACCESS read-only
  DESCRIPTION
          "Write access is not required."
  GROUP   mgmdV2ProxyMIBGroup
  DESCRIPTION
          "Write access is not required."

Chesterfield & Haberman Standards Track [Page 35] RFC 5519 MGMD MIB April 2009

  ::= { mgmdMIBCompliance 10 }

– units of conformance

mgmdHostBaseMIBGroup OBJECT-GROUP

  OBJECTS { mgmdHostInterfaceStatus,
            mgmdHostInterfaceVersion
          }
  STATUS  current
  DESCRIPTION
          "The basic collection of objects providing management of
          MGMD version 1, 2, or 3 for hosts."
  ::= { mgmdMIBGroups 1 }

mgmdRouterBaseMIBGroup OBJECT-GROUP

  OBJECTS { mgmdRouterInterfaceStatus,
            mgmdRouterInterfaceQueryInterval,
            mgmdRouterCacheUpTime, mgmdRouterCacheExpiryTime,
            mgmdRouterInterfaceVersion,
            mgmdRouterInterfaceJoins, mgmdRouterInterfaceGroups,
            mgmdRouterCacheLastReporter,
            mgmdRouterInterfaceQuerierUpTime,
            mgmdRouterInterfaceQuerierExpiryTime,
            mgmdRouterInterfaceQuerier,
            mgmdInverseRouterCacheAddress
          }
  STATUS  current
  DESCRIPTION
          "The basic collection of objects providing management of
          MGMD version 1, 2, or 3 for routers."
  ::= { mgmdMIBGroups 2 }

mgmdV2HostMIBGroup OBJECT-GROUP

  OBJECTS { mgmdHostInterfaceVersion1QuerierTimer
          }
  STATUS  current
  DESCRIPTION
          "A collection of additional read-only objects for management
          of IGMP version 2 in hosts for MGMD version 2 compliance."
  ::= { mgmdMIBGroups 3 }

mgmdHostExtendedMIBGroup OBJECT-GROUP

  OBJECTS { mgmdHostCacheLastReporter, mgmdHostCacheUpTime,
            mgmdHostInterfaceQuerier, mgmdInverseHostCacheAddress }
  STATUS  current

Chesterfield & Haberman Standards Track [Page 36] RFC 5519 MGMD MIB April 2009

  DESCRIPTION
          "A collection of optional objects for MGMD hosts."
  ::= { mgmdMIBGroups 4 }

mgmdV2RouterBaseMIBGroup OBJECT-GROUP

  OBJECTS { mgmdRouterInterfaceWrongVersionQueries,
            mgmdRouterInterfaceLastMemberQueryCount,
            mgmdRouterInterfaceStartupQueryCount,
            mgmdRouterInterfaceStartupQueryInterval,
            mgmdRouterCacheVersion1HostTimer,
            mgmdRouterInterfaceQueryMaxResponseTime,
            mgmdRouterInterfaceRobustness,
            mgmdRouterInterfaceLastMemberQueryInterval
          }
  STATUS  current
  DESCRIPTION
          "A collection of additional read-only objects for
          management of MGMD version 2 in routers."
  ::= { mgmdMIBGroups 5 }

mgmdV2ProxyMIBGroup OBJECT-GROUP

  OBJECTS { mgmdRouterInterfaceProxyIfIndex }
  STATUS  current
  DESCRIPTION
          "A collection of additional read-create objects for
          management of MGMD proxy devices."
  ::= { mgmdMIBGroups 6 }

mgmdV3HostMIBGroup OBJECT-GROUP

  OBJECTS { mgmdHostInterfaceVersion2QuerierTimer,
            mgmdHostCacheSourceFilterMode,
            mgmdHostInterfaceVersion3Robustness,
            mgmdHostSrcListExpire
          }
  STATUS  current
  DESCRIPTION
          "A collection of additional objects for
          management of MGMD version 3 in hosts."
  ::= { mgmdMIBGroups 7 }

mgmdV3RouterMIBGroup OBJECT-GROUP

  OBJECTS { mgmdRouterCacheSourceFilterMode,
            mgmdRouterCacheVersion2HostTimer,
            mgmdRouterCacheExcludeModeExpiryTimer,

Chesterfield & Haberman Standards Track [Page 37] RFC 5519 MGMD MIB April 2009

            mgmdRouterSrcListExpire
          }
  STATUS  current
  DESCRIPTION
          "A collection of additional read-only objects for
          management of MGMD version 3 in routers."
  ::= { mgmdMIBGroups 8 }

END

6. Security Considerations

 There are a number of management objects defined in this MIB module
 with a MAX-ACCESS clause of read-write and/or read-create.  Such
 objects may be considered sensitive or vulnerable in some network
 environments.  The support for SET operations in a non-secure
 environment without proper protection can have a negative effect on
 network operations.  These are the tables and objects and their
 sensitivity/vulnerability:
 o  The mgmdRouterInterfaceTable provides read-create access to 2
    values: the mgmdRouterInterfaceStatus and the
    mgmdRouterInterfaceQueryInterval.  The mgmdRouterInterfaceStatus
    presents a remote user with the ability to enable or disable
    multicast support on a given router interface, and therefore
    presents a significant denial-of-service vulnerability.  The
    mgmdRouterInterfaceQueryInterval controls the frequency with which
    host-query packets are sent, providing less of a vulnerability,
    but still requiring secure access control.
 o  The mgmdRouterCacheTable also provides access to read-create
    objects.  The mgmdRouterInterfaceVersion controls the protocol
    conformance of an interface, and is therefore a potential denial-
    of-service vulnerability.  The
    mgmdRouterInterfaceQueryMaxResponseTime, the
    mgmdRouterInterfaceRobustness, and the
    mgmdRouterInterfaceLastMemberQueryInterval are all tuning
    parameters to control the characteristic of the host-query
    packets.  Compromise of these objects can potentially be
    disruptive to local multicast communication.
 o  The mgmdHostInterfaceTable provides a read-create object, the
    mgmdHostInterfaceVersion3Robustness, which controls the robustness
    of the interface to packet loss.  Disabling robustness in the face
    of packet loss could cause denial of service to hosts; however, in
    general this presents a low risk.

Chesterfield & Haberman Standards Track [Page 38] RFC 5519 MGMD MIB April 2009

 SNMP versions prior to SNMPv3 did not include adequate security.
 Even if the network itself is secure (for example by using IPsec),
 even then, there is no control as to who on the secure network is
 allowed to access and GET/SET (read/change/create/delete) the objects
 in this MIB module.
 It is RECOMMENDED that implementers consider the security features as
 provided by the SNMPv3 framework (see [RFC3410], section 8),
 including full support for the SNMPv3 cryptographic mechanisms (for
 authentication and privacy).
 Further, deployment of SNMP versions prior to SNMPv3 is NOT
 RECOMMENDED.  Instead, it is RECOMMENDED to deploy SNMPv3 and to
 enable cryptographic security.  It is then a customer/operator
 responsibility to ensure that the SNMP entity giving access to an
 instance of this MIB module is properly configured to give access to
 the objects only to those principals (users) that have legitimate
 rights to indeed GET or SET (change/create/delete) them.

7. IANA Considerations

 This MIB introduces a new term to refer to two existing multicast
 protocols: Multicast Group Membership Discovery.  It encompasses both
 the IPv4 Multicast discovery protocol, IGMP, and the IPv6 Multicast
 discovery protocol, MLD, as defined in RFCs 2933 [RFC2933] and 3019
 [RFC3019], respectively.
      The MIB module in this document uses the following IANA-assigned
      OBJECT IDENTIFIER value recorded in the SMI Numbers registry:
      Descriptor        OBJECT IDENTIFIER value
      ----------        -----------------------
      mgmdStdMIB        { mib-2 185 }

8. Contributors

 The authors of RFC 2933 [RFC2933] and RFC 3019 [RFC3019] from which
 this document is derived are:
    Keith McCloghrie
    Dino Farinacci
    Dave Thaler
    Brian Haberman
    Randy Worzella

Chesterfield & Haberman Standards Track [Page 39] RFC 5519 MGMD MIB April 2009

9. Acknowledgements

 Special thanks to James Lingard, Bill Fenner, and Dave Thaler for
 detailed comments on the MIB.
 Bert Wijnen deserves special recognition for his exhaustive reviews
 and constructive feedback on SNMP and SMI issues related to this MIB.

10. References

10.1. Normative References

 [RFC1112]  Deering, S., "Host extensions for IP multicasting", STD 5,
            RFC 1112, August 1989.
 [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
            Requirement Levels", BCP 14, RFC 2119, March 1997.
 [RFC2236]  Fenner, W., "Internet Group Management Protocol, Version
            2", RFC 2236, November 1997.
 [RFC2578]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
            Schoenwaelder, Ed., "Structure of Management Information
            Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.
 [RFC2579]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
            Schoenwaelder, Ed., "Textual Conventions for SMIv2",
            STD 58, RFC 2579, April 1999.
 [RFC2580]  McCloghrie, K., Perkins, D., and J. Schoenwaelder,
            "Conformance Statements for SMIv2", STD 58, RFC 2580,
            April 1999.
 [RFC2710]  Deering, S., Fenner, W., and B. Haberman, "Multicast
            Listener Discovery (MLD) for IPv6", RFC 2710,
            October 1999.
 [RFC2863]  McCloghrie, K. and F. Kastenholz, "The Interfaces Group
            MIB", RFC 2863, June 2000.
 [RFC3376]  Cain, B., Deering, S., Kouvelas, I., Fenner, B., and A.
            Thyagarajan, "Internet Group Management Protocol, Version
            3", RFC 3376, October 2002.
 [RFC3810]  Vida, R. and L. Costa, "Multicast Listener Discovery
            Version 2 (MLDv2) for IPv6", RFC 3810, June 2004.

Chesterfield & Haberman Standards Track [Page 40] RFC 5519 MGMD MIB April 2009

 [RFC4001]  Daniele, M., Haberman, B., Routhier, S., and J.
            Schoenwaelder, "Textual Conventions for Internet Network
            Addresses", RFC 4001, February 2005.

10.2. Informative References

 [RFC2933]  McCloghrie, K., Farinacci, D., and D. Thaler, "Internet
            Group Management Protocol MIB", RFC 2933, October 2000.
 [RFC3019]  Haberman, B. and R. Worzella, "IP Version 6 Management
            Information Base for The Multicast Listener Discovery
            Protocol", RFC 3019, January 2001.
 [RFC3410]  Case, J., Mundy, R., Partain, D., and B. Stewart,
            "Introduction and Applicability Statements for Internet-
            Standard Management Framework", RFC 3410, December 2002.
 [RFC4605]  Fenner, B., He, H., Haberman, B., and H. Sandick,
            "Internet Group Management Protocol (IGMP) / Multicast
            Listener Discovery (MLD)-Based Multicast Forwarding
            ("IGMP/MLD Proxying")", RFC 4605, August 2006.

Authors' Addresses

 Julian Chesterfield
 University of Cambridge
 15 JJ Thompson Avenue
 Cambridge CB3 0FD
 UK
 EMail: julian.chesterfield@cl.cam.ac.uk
 Brian Haberman (editor)
 Johns Hopkins University / Applied Physics Laboratory
 11100 Johns Hopkins Road
 Laurel, MD  20723
 USA
 EMail: brian@innovationslab.net

Chesterfield & Haberman Standards Track [Page 41]

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