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RFC 2932

IPv4 Multicast Routing MIB

Pages: 27
Obsoleted by:  5132

ToP   noToC   RFC2932 - Page 1
Network Working Group                                      K. McCloghrie
Request for Comments: 2932                                 cisco Systems
Category: Standards Track                                   D. Farinacci
                                                        Procket Networks
                                                               D. Thaler
                                                               Microsoft
                                                            October 2000


                       IPv4 Multicast Routing 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) The Internet Society (2000).  All Rights Reserved.

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 managed objects used for managing IP Multicast Routing for IPv4, independent of the specific multicast routing protocol in use.

Table of Contents

1 Introduction ................................................. 2 2 The SNMP Management Framework ................................ 2 3 Overview ..................................................... 3 4 Definitions .................................................. 4 5 IANA Considerations .......................................... 22 6 Security Considerations ...................................... 22 7 Intellectual Property Notice ................................. 23 8 Acknowledgements ............................................. 23 9 Authors' Addresses ........................................... 24 10 References ................................................... 25 11 Full Copyright Statement ..................................... 27
ToP   noToC   RFC2932 - Page 2

1. Introduction

This MIB describes objects used for managing IP Multicast Routing [16], independent of the specific multicast routing protocol [17-21] in use. Managed objects specific to particular multicast routing protocols are specified elsewhere. Similarly, this MIB does not support management of multicast routing for other address families, including IPv6. Such management may be supported by other MIBs.

2. The SNMP Management Framework

The SNMP Management Framework presently consists of five major components: o An overall architecture, described in RFC 2571 [1]. o Mechanisms for describing and naming objects and events for the purpose of management. The first version of this Structure of Management Information (SMI) is called SMIv1 and described in STD 16, RFC 1155 [2], STD 16, RFC 1212 [3] and RFC 1215 [4]. The second version, called SMIv2, is described in STD 58, RFC 2578 [5], STD 58, RFC 2579 [6] and STD 58, RFC 2580 [7]. o Message protocols for transferring management information. The first version of the SNMP message protocol is called SNMPv1 and described in STD 15, RFC 1157 [8]. A second version of the SNMP message protocol, which is not an Internet standards track protocol, is called SNMPv2c and described in RFC 1901 [9] and RFC 1906 [10]. The third version of the message protocol is called SNMPv3 and described in RFC 1906 [10], RFC 2572 [11] and RFC 2574 [12]. o Protocol operations for accessing management information. The first set of protocol operations and associated PDU formats is described in STD 15, RFC 1157 [8]. A second set of protocol operations and associated PDU formats is described in RFC 1905 [13]. o A set of fundamental applications described in RFC 2573 [14] and the view-based access control mechanism described in RFC 2575 [15]. Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. Objects in the MIB are defined using the mechanisms defined in the SMI.
ToP   noToC   RFC2932 - Page 3
   This memo specifies a MIB module that is compliant to the SMIv2.  A
   MIB conforming to the SMIv1 can be produced through the appropriate
   translations.  The resulting translated MIB must be semantically
   equivalent, except where objects or events are omitted because no
   translation is possible (use of Counter64).  Some machine readable
   information in SMIv2 will be converted into textual descriptions in
   SMIv1 during the translation process.  However, this loss of machine
   readable information is not considered to change the semantics of the
   MIB.

3. Overview

This MIB module contains one scalar and five tables. The tables are: (1) the IP Multicast Route Table containing multicast routing information for IP datagrams sent by particular sources to the IP multicast groups known to a router. (2) the IP Multicast Routing Next Hop Table containing information on the next-hops for the routing IP multicast datagrams. Each entry is one of a list of next-hops on outgoing interfaces for particular sources sending to a particular multicast group address. (3) the IP Multicast Routing Interface Table containing multicast routing information specific to interfaces. (4) the IP Multicast Scope Boundary Table containing the boundaries configured for multicast scopes [22]. (5) the IP Multicast Scope Name Table containing human-readable names of multicast scope.
ToP   noToC   RFC2932 - Page 4

4. Definitions

IPMROUTE-STD-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, mib-2, Integer32, Counter32, Counter64, Gauge32, IpAddress, TimeTicks FROM SNMPv2-SMI RowStatus, TEXTUAL-CONVENTION, TruthValue FROM SNMPv2-TC MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF SnmpAdminString FROM SNMP-FRAMEWORK-MIB InterfaceIndexOrZero, InterfaceIndex FROM IF-MIB IANAipRouteProtocol, IANAipMRouteProtocol FROM IANA-RTPROTO-MIB; ipMRouteStdMIB MODULE-IDENTITY LAST-UPDATED "200009220000Z" -- September 22, 2000 ORGANIZATION "IETF IDMR Working Group" CONTACT-INFO " Dave Thaler Microsoft Corporation One Microsoft Way Redmond, WA 98052-6399 US Phone: +1 425 703 8835 EMail: dthaler@microsoft.com" DESCRIPTION "The MIB module for management of IP Multicast routing, but independent of the specific multicast routing protocol in use." REVISION "200009220000Z" -- September 22, 2000 DESCRIPTION "Initial version, published as RFC 2932." ::= { mib-2 83 } -- Textual Conventions LanguageTag ::= TEXTUAL-CONVENTION DISPLAY-HINT "100a" STATUS current DESCRIPTION "An RFC 1766-style language tag, with all alphabetic characters converted to lowercase. This restriction is intended to make the lexical ordering imposed by SNMP useful
ToP   noToC   RFC2932 - Page 5
            when applied to language tags.  Note that it is
            theoretically possible for a valid language tag to exceed
            the allowed length of this syntax, and thus be impossible to
            represent with this syntax.  Sampling of language tags in
            current use on the Internet suggests that this limit does
            not pose a serious problem in practice."
   SYNTAX       OCTET STRING (SIZE (1..100))


-- Top-level structure of the MIB

ipMRouteMIBObjects OBJECT IDENTIFIER ::= { ipMRouteStdMIB 1 }

ipMRoute      OBJECT IDENTIFIER ::= { ipMRouteMIBObjects 1 }

-- the IP Multicast Routing MIB-Group
--
-- a collection of objects providing information about
-- IP Multicast Groups


ipMRouteEnable OBJECT-TYPE
    SYNTAX     INTEGER { enabled(1), disabled(2) }
    MAX-ACCESS read-write
    STATUS     current
    DESCRIPTION
            "The enabled status of IP Multicast routing on this router."
    ::= { ipMRoute 1 }

ipMRouteEntryCount OBJECT-TYPE
    SYNTAX     Gauge32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The number of rows in the ipMRouteTable.  This can be used
            to monitor the multicast routing table size."
    ::= { ipMRoute 7 }

ipMRouteTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpMRouteEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The (conceptual) table containing multicast routing
            information for IP datagrams sent by particular sources to
            the IP multicast groups known to this router."
    ::= { ipMRoute 2 }
ToP   noToC   RFC2932 - Page 6
ipMRouteEntry OBJECT-TYPE
    SYNTAX     IpMRouteEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "An entry (conceptual row) containing the multicast routing
            information for IP datagrams from a particular source and
            addressed to a particular IP multicast group address.
            Discontinuities in counters in this entry can be detected by
            observing the value of ipMRouteUpTime."
    INDEX      { ipMRouteGroup,
                 ipMRouteSource,
                 ipMRouteSourceMask }
    ::= { ipMRouteTable 1 }

IpMRouteEntry ::= SEQUENCE {
    ipMRouteGroup                 IpAddress,
    ipMRouteSource                IpAddress,
    ipMRouteSourceMask            IpAddress,
    ipMRouteUpstreamNeighbor      IpAddress,
    ipMRouteInIfIndex             InterfaceIndexOrZero,
    ipMRouteUpTime                TimeTicks,
    ipMRouteExpiryTime            TimeTicks,
    ipMRoutePkts                  Counter32,
    ipMRouteDifferentInIfPackets  Counter32,
    ipMRouteOctets                Counter32,
    ipMRouteProtocol              IANAipMRouteProtocol,
    ipMRouteRtProto               IANAipRouteProtocol,
    ipMRouteRtAddress             IpAddress,
    ipMRouteRtMask                IpAddress,
    ipMRouteRtType                INTEGER,
    ipMRouteHCOctets              Counter64
}

ipMRouteGroup OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The IP multicast group address for which this entry
            contains multicast routing information."
    ::= { ipMRouteEntry 1 }

ipMRouteSource OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
ToP   noToC   RFC2932 - Page 7
            "The network address which when combined with the
            corresponding value of ipMRouteSourceMask identifies the
            sources for which this entry contains multicast routing
            information."
    ::= { ipMRouteEntry 2 }

ipMRouteSourceMask OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The network mask which when combined with the corresponding
            value of ipMRouteSource identifies the sources for which
            this entry contains multicast routing information."
    ::= { ipMRouteEntry 3 }

ipMRouteUpstreamNeighbor OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The address of the upstream neighbor (e.g., RPF neighbor)
            from which IP datagrams from these sources to this multicast
            address are received, or 0.0.0.0 if the upstream neighbor is
            unknown (e.g., in CBT)."
    ::= { ipMRouteEntry 4 }

ipMRouteInIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndexOrZero
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The value of ifIndex for the interface on which IP
            datagrams sent by these sources to this multicast address
            are received.  A value of 0 indicates that datagrams are not
            subject to an incoming interface check, but may be accepted
            on multiple interfaces (e.g., in CBT)."
    ::= { ipMRouteEntry 5 }

ipMRouteUpTime OBJECT-TYPE
    SYNTAX     TimeTicks
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The time since the multicast routing information
            represented by this entry was learned by the router."
    ::= { ipMRouteEntry 6 }
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ipMRouteExpiryTime OBJECT-TYPE
    SYNTAX     TimeTicks
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The minimum amount of time remaining before this entry will
            be aged out.  The value 0 indicates that the entry is not
            subject to aging."
    ::= { ipMRouteEntry 7 }

ipMRoutePkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The number of packets which this router has received from
            these sources and addressed to this multicast group
            address."
    ::= { ipMRouteEntry 8 }

ipMRouteDifferentInIfPackets OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The number of packets which this router has received from
            these sources and addressed to this multicast group address,
            which were dropped because they were not received on the
            interface indicated by ipMRouteInIfIndex.  Packets which are
            not subject to an incoming interface check (e.g., using CBT)
            are not counted."
    ::= { ipMRouteEntry 9 }

ipMRouteOctets OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The number of octets contained in IP datagrams which were
            received from these sources and addressed to this multicast
            group address, and which were forwarded by this router."
    ::= { ipMRouteEntry 10 }

ipMRouteProtocol OBJECT-TYPE
    SYNTAX     IANAipMRouteProtocol
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
ToP   noToC   RFC2932 - Page 9
            "The multicast routing protocol via which this multicast
            forwarding entry was learned."
    ::= { ipMRouteEntry 11 }

ipMRouteRtProto OBJECT-TYPE
    SYNTAX     IANAipRouteProtocol
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The routing mechanism via which the route used to find the
            upstream or parent interface for this multicast forwarding
            entry was learned.  Inclusion of values for routing
            protocols is not intended to imply that those protocols need
            be supported."
    ::= { ipMRouteEntry 12 }

ipMRouteRtAddress OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The address portion of the route used to find the upstream
            or parent interface for this multicast forwarding entry."
    ::= { ipMRouteEntry 13 }

ipMRouteRtMask OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The mask associated with the route used to find the upstream
            or parent interface for this multicast forwarding entry."
    ::= { ipMRouteEntry 14 }

ipMRouteRtType OBJECT-TYPE
    SYNTAX     INTEGER {
                unicast (1),  -- Unicast route used in multicast RIB
                multicast (2) -- Multicast route
               }
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The reason the given route was placed in the (logical)
            multicast Routing Information Base (RIB).  A value of
            unicast means that the route would normally be placed only
            in the unicast RIB, but was placed in the multicast RIB
            (instead or in addition) due to local configuration, such as
            when running PIM over RIP.  A value of multicast means that
ToP   noToC   RFC2932 - Page 10
            the route was explicitly added to the multicast RIB by the
            routing protocol, such as DVMRP or Multiprotocol BGP."
    ::= { ipMRouteEntry 15 }

ipMRouteHCOctets OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The number of octets contained in IP datagrams which were
            received from these sources and addressed to this multicast
            group address, and which were forwarded by this router.
            This object is a 64-bit version of ipMRouteOctets."
    ::= { ipMRouteEntry 16 }

--
--  The IP Multicast Routing Next Hop Table
--

ipMRouteNextHopTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpMRouteNextHopEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The (conceptual) table containing information on the next-
            hops on outgoing interfaces for routing IP multicast
            datagrams.  Each entry is one of a list of next-hops on
            outgoing interfaces for particular sources sending to a
            particular multicast group address."
    ::= { ipMRoute 3 }

ipMRouteNextHopEntry OBJECT-TYPE
    SYNTAX     IpMRouteNextHopEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "An entry (conceptual row) in the list of next-hops on
            outgoing interfaces to which IP multicast datagrams from
            particular sources to a IP multicast group address are
            routed.  Discontinuities in counters in this entry can be
            detected by observing the value of ipMRouteUpTime."
    INDEX      { ipMRouteNextHopGroup, ipMRouteNextHopSource,
                 ipMRouteNextHopSourceMask, ipMRouteNextHopIfIndex,
                 ipMRouteNextHopAddress }
    ::= { ipMRouteNextHopTable 1 }

IpMRouteNextHopEntry ::= SEQUENCE {
    ipMRouteNextHopGroup              IpAddress,
ToP   noToC   RFC2932 - Page 11
    ipMRouteNextHopSource             IpAddress,
    ipMRouteNextHopSourceMask         IpAddress,
    ipMRouteNextHopIfIndex            InterfaceIndex,
    ipMRouteNextHopAddress            IpAddress,
    ipMRouteNextHopState              INTEGER,
    ipMRouteNextHopUpTime             TimeTicks,
    ipMRouteNextHopExpiryTime         TimeTicks,
    ipMRouteNextHopClosestMemberHops  Integer32,
    ipMRouteNextHopProtocol           IANAipMRouteProtocol,
    ipMRouteNextHopPkts               Counter32
}

ipMRouteNextHopGroup OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The IP multicast group for which this entry specifies a
            next-hop on an outgoing interface."
    ::= { ipMRouteNextHopEntry 1 }

ipMRouteNextHopSource OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The network address which when combined with the
            corresponding value of ipMRouteNextHopSourceMask identifies
            the sources for which this entry specifies a next-hop on an
            outgoing interface."
    ::= { ipMRouteNextHopEntry 2 }

ipMRouteNextHopSourceMask OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The network mask which when combined with the corresponding
            value of ipMRouteNextHopSource identifies the sources for
            which this entry specifies a next-hop on an outgoing
            interface."
    ::= { ipMRouteNextHopEntry 3 }

ipMRouteNextHopIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndex
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
ToP   noToC   RFC2932 - Page 12
            "The ifIndex value of the interface for the outgoing
            interface for this next-hop."
    ::= { ipMRouteNextHopEntry 4 }

ipMRouteNextHopAddress OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The address of the next-hop specific to this entry.  For
            most interfaces, this is identical to ipMRouteNextHopGroup.
            NBMA interfaces, however, may have multiple next-hop
            addresses out a single outgoing interface."
    ::= { ipMRouteNextHopEntry 5 }

ipMRouteNextHopState OBJECT-TYPE
    SYNTAX     INTEGER { pruned(1), forwarding(2) }
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "An indication of whether the outgoing interface and next-
            hop represented by this entry is currently being used to
            forward IP datagrams.  The value 'forwarding' indicates it
            is currently being used; the value 'pruned' indicates it is
            not."
    ::= { ipMRouteNextHopEntry 6 }

ipMRouteNextHopUpTime OBJECT-TYPE
    SYNTAX     TimeTicks
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The time since the multicast routing information
            represented by this entry was learned by the router."
    ::= { ipMRouteNextHopEntry 7 }

ipMRouteNextHopExpiryTime OBJECT-TYPE
    SYNTAX     TimeTicks
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The minimum amount of time remaining before this entry will
            be aged out.  If ipMRouteNextHopState is pruned(1), the
            remaining time until the prune expires and the state reverts
            to forwarding(2).  Otherwise, the remaining time until this
            entry is removed from the table.  The time remaining may be
            copied from ipMRouteExpiryTime if the protocol in use for
            this entry does not specify next-hop timers.  The value 0
ToP   noToC   RFC2932 - Page 13
            indicates that the entry is not subject to aging."
    ::= { ipMRouteNextHopEntry 8 }

ipMRouteNextHopClosestMemberHops OBJECT-TYPE
    SYNTAX     Integer32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The minimum number of hops between this router and any
            member of this IP multicast group reached via this next-hop
            on this outgoing interface.  Any IP multicast datagrams for
            the group which have a TTL less than this number of hops
            will not be forwarded to this next-hop."
    ::= { ipMRouteNextHopEntry 9 }

ipMRouteNextHopProtocol OBJECT-TYPE
    SYNTAX     IANAipMRouteProtocol
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The routing mechanism via which this next-hop was learned."
    ::= { ipMRouteNextHopEntry 10 }

ipMRouteNextHopPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The number of packets which have been forwarded using this
            route."
    ::= { ipMRouteNextHopEntry 11 }

--
--  The Multicast Routing Interface Table
--

ipMRouteInterfaceTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpMRouteInterfaceEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The (conceptual) table containing multicast routing
            information specific to interfaces."
    ::= { ipMRoute 4 }

ipMRouteInterfaceEntry OBJECT-TYPE
    SYNTAX     IpMRouteInterfaceEntry
    MAX-ACCESS not-accessible
ToP   noToC   RFC2932 - Page 14
    STATUS     current
    DESCRIPTION
            "An entry (conceptual row) containing the multicast routing
            information for a particular interface."
    INDEX      { ipMRouteInterfaceIfIndex }
    ::= { ipMRouteInterfaceTable 1 }

IpMRouteInterfaceEntry ::= SEQUENCE {
    ipMRouteInterfaceIfIndex          InterfaceIndex,
    ipMRouteInterfaceTtl              Integer32,
    ipMRouteInterfaceProtocol         IANAipMRouteProtocol,
    ipMRouteInterfaceRateLimit        Integer32,
    ipMRouteInterfaceInMcastOctets    Counter32,
    ipMRouteInterfaceOutMcastOctets   Counter32,
    ipMRouteInterfaceHCInMcastOctets  Counter64,
    ipMRouteInterfaceHCOutMcastOctets Counter64
}

ipMRouteInterfaceIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndex
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The ifIndex value of the interface for which this entry
            contains information."
    ::= { ipMRouteInterfaceEntry 1 }

ipMRouteInterfaceTtl OBJECT-TYPE
    SYNTAX     Integer32 (0..255)
    MAX-ACCESS read-write
    STATUS     current
    DESCRIPTION
            "The datagram TTL threshold for the interface. Any IP
            multicast datagrams with a TTL less than this threshold will
            not be forwarded out the interface. The default value of 0
            means all multicast packets are forwarded out the
            interface."
    ::= { ipMRouteInterfaceEntry 2 }

ipMRouteInterfaceProtocol OBJECT-TYPE
    SYNTAX     IANAipMRouteProtocol
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The routing protocol running on this interface."
    ::= { ipMRouteInterfaceEntry 3 }

ipMRouteInterfaceRateLimit OBJECT-TYPE
ToP   noToC   RFC2932 - Page 15
    SYNTAX     Integer32
    MAX-ACCESS read-write
    STATUS     current
    DESCRIPTION
            "The rate-limit, in kilobits per second, of forwarded
            multicast traffic on the interface.  A rate-limit of 0
            indicates that no rate limiting is done."
    DEFVAL     { 0 }
    ::= { ipMRouteInterfaceEntry 4 }

ipMRouteInterfaceInMcastOctets OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The number of octets of multicast packets that have arrived
            on the interface, including framing characters.  This object
            is similar to ifInOctets in the Interfaces MIB, except that
            only multicast packets are counted."
    ::= { ipMRouteInterfaceEntry 5 }

ipMRouteInterfaceOutMcastOctets OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The number of octets of multicast packets that have been
            sent on the interface."
    ::= { ipMRouteInterfaceEntry 6 }

ipMRouteInterfaceHCInMcastOctets OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The number of octets of multicast packets that have arrived
            on the interface, including framing characters.  This object
            is a 64-bit version of ipMRouteInterfaceInMcastOctets.  It
            is similar to ifHCInOctets in the Interfaces MIB, except
            that only multicast packets are counted."
    ::= { ipMRouteInterfaceEntry 7 }

ipMRouteInterfaceHCOutMcastOctets OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The number of octets of multicast packets that have been
ToP   noToC   RFC2932 - Page 16
            sent on the interface.  This object is a 64-bit version of
            ipMRouteInterfaceOutMcastOctets."
    ::= { ipMRouteInterfaceEntry 8 }

--
--  The IP Multicast Scope Boundary Table
--

ipMRouteBoundaryTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpMRouteBoundaryEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The (conceptual) table listing the router's scoped
            multicast address boundaries."
    ::= { ipMRoute 5 }

ipMRouteBoundaryEntry OBJECT-TYPE
    SYNTAX     IpMRouteBoundaryEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "An entry (conceptual row) in the ipMRouteBoundaryTable
            representing a scoped boundary."
    INDEX      { ipMRouteBoundaryIfIndex, ipMRouteBoundaryAddress,
                 ipMRouteBoundaryAddressMask }
    ::= { ipMRouteBoundaryTable 1 }

IpMRouteBoundaryEntry ::= SEQUENCE {
    ipMRouteBoundaryIfIndex            InterfaceIndex,
    ipMRouteBoundaryAddress            IpAddress,
    ipMRouteBoundaryAddressMask        IpAddress,
    ipMRouteBoundaryStatus             RowStatus
}

ipMRouteBoundaryIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndex
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The IfIndex value for the interface to which this boundary
            applies.  Packets with a destination address in the
            associated address/mask range will not be forwarded out this
            interface."
    ::= { ipMRouteBoundaryEntry 1 }

ipMRouteBoundaryAddress OBJECT-TYPE
    SYNTAX     IpAddress
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    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The group address which when combined with the
            corresponding value of ipMRouteBoundaryAddressMask
            identifies the group range for which the scoped boundary
            exists.  Scoped addresses must come from the range 239.x.x.x
            as specified in RFC 2365."
    ::= { ipMRouteBoundaryEntry 2 }

ipMRouteBoundaryAddressMask OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The group address mask which when combined with the
            corresponding value of ipMRouteBoundaryAddress identifies
            the group range for which the scoped boundary exists."
    ::= { ipMRouteBoundaryEntry 3 }

ipMRouteBoundaryStatus OBJECT-TYPE
    SYNTAX     RowStatus
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
            "The status of this row, by which new entries may be
            created, or old entries deleted from this table."
    ::= { ipMRouteBoundaryEntry 4 }

--
--  The IP Multicast Scope Name Table
--

ipMRouteScopeNameTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpMRouteScopeNameEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The (conceptual) table listing the multicast scope names."
    ::= { ipMRoute 6 }

ipMRouteScopeNameEntry OBJECT-TYPE
    SYNTAX     IpMRouteScopeNameEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "An entry (conceptual row) in the ipMRouteScopeNameTable
            representing a multicast scope name."
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    INDEX      { ipMRouteScopeNameAddress,
                 ipMRouteScopeNameAddressMask,
                 IMPLIED ipMRouteScopeNameLanguage }
    ::= { ipMRouteScopeNameTable 1 }

IpMRouteScopeNameEntry ::= SEQUENCE {
    ipMRouteScopeNameAddress            IpAddress,
    ipMRouteScopeNameAddressMask        IpAddress,
    ipMRouteScopeNameLanguage           LanguageTag,
    ipMRouteScopeNameString             SnmpAdminString,
    ipMRouteScopeNameDefault            TruthValue,
    ipMRouteScopeNameStatus             RowStatus
}

ipMRouteScopeNameAddress OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The group address which when combined with the
            corresponding value of ipMRouteScopeNameAddressMask
            identifies the group range associated with the multicast
            scope.  Scoped addresses must come from the range
            239.x.x.x."
    ::= { ipMRouteScopeNameEntry 1 }

ipMRouteScopeNameAddressMask OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The group address mask which when combined with the
            corresponding value of ipMRouteScopeNameAddress identifies
            the group range associated with the multicast scope."
    ::= { ipMRouteScopeNameEntry 2 }

ipMRouteScopeNameLanguage OBJECT-TYPE
    SYNTAX     LanguageTag
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The RFC 1766-style language tag associated with the scope
            name."
    ::= { ipMRouteScopeNameEntry 3 }

ipMRouteScopeNameString OBJECT-TYPE
    SYNTAX     SnmpAdminString
    MAX-ACCESS read-create
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    STATUS     current
    DESCRIPTION
            "The textual name associated with the multicast scope.  The
            value of this object should be suitable for displaying to
            end-users, such as when allocating a multicast address in
            this scope.  When no name is specified, the default value of
            this object should be the string 239.x.x.x/y with x and y
            replaced appropriately to describe the address and mask
            length associated with the scope."
    ::= { ipMRouteScopeNameEntry 4 }

ipMRouteScopeNameDefault OBJECT-TYPE
    SYNTAX     TruthValue
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
            "If true, indicates a preference that the name in the
            following language should be used by applications if no name
            is available in a desired language."
    DEFVAL { false }
    ::= { ipMRouteScopeNameEntry 5 }

ipMRouteScopeNameStatus OBJECT-TYPE
    SYNTAX     RowStatus
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
            "The status of this row, by which new entries may be
            created, or old entries deleted from this table."
    ::= { ipMRouteScopeNameEntry 6 }


-- conformance information

ipMRouteMIBConformance
                  OBJECT IDENTIFIER ::= { ipMRouteStdMIB 2 }
ipMRouteMIBCompliances
                  OBJECT IDENTIFIER ::= { ipMRouteMIBConformance 1 }
ipMRouteMIBGroups  OBJECT IDENTIFIER ::= { ipMRouteMIBConformance 2 }

-- compliance statements

ipMRouteMIBCompliance MODULE-COMPLIANCE
    STATUS  current
    DESCRIPTION
            "The compliance statement for the IP Multicast MIB."
    MODULE  -- this module
    MANDATORY-GROUPS { ipMRouteMIBBasicGroup,
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                       ipMRouteMIBRouteGroup}

        GROUP   ipMRouteMIBBoundaryGroup
        DESCRIPTION
            "This group is mandatory if the router supports
            administratively-scoped multicast address boundaries."

        OBJECT      ipMRouteBoundaryStatus
        MIN-ACCESS  read-only
        DESCRIPTION
            "Write access is not required."

        OBJECT      ipMRouteScopeNameStatus
        MIN-ACCESS  read-only
        DESCRIPTION
            "Write access is not required."

        GROUP   ipMRouteMIBHCInterfaceGroup
        DESCRIPTION
            "This group is mandatory only for those network interfaces
            for which the value of the corresponding instance of ifSpeed
            is greater than 20,000,000 bits/second."

    ::= { ipMRouteMIBCompliances 1 }

-- units of conformance

ipMRouteMIBBasicGroup OBJECT-GROUP
    OBJECTS { ipMRouteEnable, ipMRouteEntryCount,
              ipMRouteUpstreamNeighbor, ipMRouteInIfIndex,
              ipMRouteUpTime, ipMRouteExpiryTime,
              ipMRouteNextHopState,
              ipMRouteNextHopUpTime,
              ipMRouteNextHopExpiryTime,
              ipMRouteNextHopProtocol,
              ipMRouteNextHopPkts,
              ipMRouteInterfaceTtl,
              ipMRouteInterfaceProtocol, ipMRouteInterfaceRateLimit,
              ipMRouteInterfaceInMcastOctets,
              ipMRouteInterfaceOutMcastOctets,
              ipMRouteProtocol
            }
    STATUS  current
    DESCRIPTION
            "A collection of objects to support basic management of IP
            Multicast routing."
    ::= { ipMRouteMIBGroups 1 }
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ipMRouteMIBHopCountGroup OBJECT-GROUP
    OBJECTS { ipMRouteNextHopClosestMemberHops }
    STATUS  current
    DESCRIPTION
            "A collection of objects to support management of the use of
            hop counts in IP Multicast routing."
    ::= { ipMRouteMIBGroups 2 }

ipMRouteMIBBoundaryGroup OBJECT-GROUP
    OBJECTS { ipMRouteBoundaryStatus, ipMRouteScopeNameString,
              ipMRouteScopeNameDefault, ipMRouteScopeNameStatus }
    STATUS  current
    DESCRIPTION
            "A collection of objects to support management of scoped
            multicast address boundaries."
    ::= { ipMRouteMIBGroups 3 }

ipMRouteMIBPktsOutGroup OBJECT-GROUP
    OBJECTS { ipMRouteNextHopPkts }
    STATUS  current
    DESCRIPTION
            "A collection of objects to support management of packet
            counters for each outgoing interface entry of a route."
    ::= { ipMRouteMIBGroups 4 }

ipMRouteMIBHCInterfaceGroup OBJECT-GROUP
    OBJECTS { ipMRouteInterfaceHCInMcastOctets,
              ipMRouteInterfaceHCOutMcastOctets,
              ipMRouteHCOctets }
    STATUS  current
    DESCRIPTION
            "A collection of objects providing information specific to
            high speed (greater than 20,000,000 bits/second) network
            interfaces."
    ::= { ipMRouteMIBGroups 5 }

ipMRouteMIBRouteGroup OBJECT-GROUP
    OBJECTS { ipMRouteRtProto, ipMRouteRtAddress,
              ipMRouteRtMask, ipMRouteRtType }
    STATUS  current
    DESCRIPTION
            "A collection of objects providing information on the
            relationship between multicast routing information, and the
            IP Forwarding Table."
    ::= { ipMRouteMIBGroups 6 }

ipMRouteMIBPktsGroup OBJECT-GROUP
    OBJECTS { ipMRoutePkts, ipMRouteDifferentInIfPackets,
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              ipMRouteOctets }
    STATUS  current
    DESCRIPTION
            "A collection of objects to support management of packet
            counters for each forwarding entry."
    ::= { ipMRouteMIBGroups 7 }

END

5. IANA Considerations

The ipMRouteRtProto, ipMRouteNextHopProtocol, ipMRouteInterfaceProtocol, and ipMRouteProtocol use textual conventions imported from the IANA-RTPROTO-MIB. The purpose of defining these textual conventions in a separate MIB module is to allow additional values to be defined without having to issue a new version of this document. The Internet Assigned Numbers Authority (IANA) is responsible for the assignment of all Internet numbers, including various SNMP-related numbers; it will administer the values associated with these textual conventions. The rules for additions or changes to the IANA-RTPROTO-MIB are outlined in the DESCRIPTION clause associated with its MODULE- IDENTITY statement. The current versions of the IANA-RTPROTO-MIB can be accessed from the IANA home page at: "http://www.iana.org/".

6. Security Considerations

This MIB contains readable objects whose values provide information related to multicast routing, including information on what machines are sending to which groups. There are also a number of objects that have a MAX-ACCESS clause of read-write and/or read-create, such as those which allow an administrator to configure multicast boundaries. While unauthorized access to the readable objects is relatively innocuous, unauthorized access to the write-able objects could cause a denial of service, or could cause wider distribution of packets intended only for local distribution. Hence, the support for SET operations in a non-secure environment without proper protection can have a negative effect on network operations. SNMPv1 by itself is such an insecure environment. 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 SET (change/create/delete) the objects in this MIB.
ToP   noToC   RFC2932 - Page 23
   It is recommended that the implementers consider the security
   features as provided by the SNMPv3 framework.  Specifically, the use
   of the User-based Security Model RFC 2574 [12] and the View-based
   Access Control Model RFC 2575 [15] is recommended.

   It is then a customer/user responsibility to ensure that the SNMP
   entity giving access to this MIB, is properly configured to give
   access to those objects only to those principals (users) that have
   legitimate rights to access them.

7. Intellectual Property Notice

The IETF takes no position regarding the validity or scope of any intellectual property or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; neither does it represent that it has made any effort to identify any such rights. Information on the IETF's procedures with respect to rights in standards-track and standards-related documentation can be found in BCP-11. Copies of claims of rights made available for publication and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementers or users of this specification can be obtained from the IETF Secretariat. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights which may cover technology that may be required to practice this standard. Please address the information to the IETF Executive Director.

8. Acknowledgements

This MIB module was updated based on feedback from the IETF's Inter- Domain Multicast Routing (IDMR) Working Group.
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9. Authors' Addresses

Keith McCloghrie cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 Phone: +1 408 526 5260 EMail: kzm@cisco.com Dino Farinacci Procket Networks 3850 North First Street San Jose, CA 95134 Phone: +1 408-954-7909 Email: dino@procket.com Dave Thaler Microsoft Corporation One Microsoft Way Redmond, WA 98052-6399 Phone: +1 425 703 8835 EMail: dthaler@microsoft.com
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10. References

[1] Wijnen, B., Harrington, D. and R. Presuhn, "An Architecture for Describing SNMP Management Frameworks", RFC 2571, April 1999. [2] Rose, M. and K. McCloghrie, "Structure and Identification of Management Information for TCP/IP-based Internets", STD 16, RFC 1155, May 1990. [3] Rose, M. and K. McCloghrie, "Concise MIB Definitions", STD 16, RFC 1212, March 1991. [4] Rose, M., "A Convention for Defining Traps for use with the SNMP", RFC 1215, March 1991. [5] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, STD 58, April 1999. [6] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Textual Conventions for SMIv2", STD 58, RFC 2579, April 1999. [7] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Conformance Statements for SMIv2", STD 58, RFC 2580, April 1999. [8] Case, J., Fedor, M., Schoffstall, M. and J. Davin, "Simple Network Management Protocol", STD 15, RFC 1157, May 1990. [9] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Introduction to Community-based SNMPv2", RFC 1901, January 1996. [10] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Transport Mappings for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1906, January 1996. [11] Case, J., Harrington D., Presuhn R. and B. Wijnen, "Message Processing and Dispatching for the Simple Network Management Protocol (SNMP)", RFC 2572, April 1999. [12] Blumenthal, U. and B. Wijnen, "User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)", RFC 2574, April 1999.
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   [13] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Protocol
        Operations for Version 2 of the Simple Network Management
        Protocol (SNMPv2)", RFC 1905, January 1996.

   [14] Levi, D., Meyer, P. and B. Stewart, "SNMPv3 Applications", RFC
        2573, April 1999.

   [15] Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based Access
        Control Model (VACM) for the Simple Network Management Protocol
        (SNMP)", RFC 2575, April 1999.

   [16] Deering, S., "Multicast Routing in a Datagram Internetwork", PhD
        thesis, Electrical Engineering Dept., Stanford University,
        December 1991.

   [17] Waitzman, D., Partridge, C. and S. Deering, "Distance Vector
        Multicast Routing Protocol", RFC 1075, November 1988.

   [18] Estrin, D., Farinacci, D., Helmy, A., Thaler, D., Deering, S.,
        Handley, M., Jacobson, V., Liu, C., Sharma, P. and L. Wei,
        "Protocol Independent Multicast-Sparse Mode (PIM-SM): Protocol
        Specification", RFC 2362, June 1998.

   [19] Deering, S., Estrin, D., Farinacci, D., Jacobson, V., Helmy, A.
        and L. Wei, "Protocol Independent Multicast Version 2, Dense
        Mode Specification", Work in Progress.

   [20] Moy, J., "Multicast Extensions to OSPF", RFC 1584, March 1994.

   [21] Ballardie, A., "Core Based Trees (CBT version 2) Multicast
        Routing", RFC 2189, September 1997.

   [22] Meyer, D., "Administratively Scoped IP Multicast", BCP 23, RFC
        2365, July 1998.
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11. Full Copyright Statement

Copyright (C) The Internet Society (2000). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Acknowledgement Funding for the RFC Editor function is currently provided by the Internet Society.