Network Working Group                                         G. Malkin
Request for Comments: 1724                               Xylogics, Inc.
Obsoletes: 1389                                                F. Baker
Category: Standards Track                                 Cisco Systems
                                                         November 1994


                     RIP Version 2 MIB Extension

Status of this Memo

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

Abstract

  This memo defines a portion of the Management Information Base (MIB)
  for use with network management protocols in TCP/IP-based internets.
  In particular, it defines objects for managing RIP Version 2.

Acknowledgements

  The authors would like to thank the IETF ripv2 Working Group for
  their help in improving the RIP-2 MIB extension.

Table of Contents

  1. The Network Management Framework ......................    2
  2. Objects ...............................................    2
  2.1 Format of Definitions ................................    3
  3. Overview ..............................................    3
  3.1 Textual Conventions ..................................    3
  3.2 Structure of MIB .....................................    3
  3.3 Modifications from RFC 1389 ..........................    3
  4. Definitions ...........................................    5
  4.1 Global Counters ......................................    6
  4.2 RIP Interface Tables .................................    6
  4.3 Peer Table ...........................................   12
  5. References ............................................   17
  6. Security Considerations ...............................   18
  7. Authors' Addresses ....................................   18







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RFC 1724                  RIP-2 MIB Extension              November 1994


1. The Network Management Framework

  The Internet-standard Network Management Framework consists of three
  components.  They are:

     STD 16/RFC 1155 which defines the SMI, the mechanisms used for
        describing and naming objects for the purpose of management.

     STD 16/RFC 1212 defines a more concise description mechanism,
        which is wholly consistent with the SMI.

     RFC 1156 which defines MIB-I, the core set of managed objects for
        the Internet suite of protocols.  STD 17/RFC 1213 defines MIB-
        II, an evolution of MIB-I based on implementation experience
        and new operational requirements.

     STD 15/RFC 1157 which defines the SNMP, the protocol used for
        network access to managed objects.

  The Framework permits new objects to be defined for the purpose of
  experimentation and evaluation.

2. Objects

  Managed objects are accessed via a virtual information store, termed
  the Management Information Base or MIB.  Objects in the MIB are
  defined using the subset of Abstract Syntax Notation One (ASN.1) [7]
  defined in the SMI.  In particular, each object has a name, a syntax,
  and an encoding.  The name is an object identifier, an
  administratively assigned name, which specifies an object type.  The
  object type together with an object instance serves to uniquely
  identify a specific instantiation of the object.  For human
  convenience, we often use a textual string, termed the OBJECT
  DESCRIPTOR, to also refer to the object type.

  The syntax of an object type defines the abstract data structure
  corresponding to that object type.  The ASN.1 language is used for
  this purpose.  However, the SMI [3] purposely restricts the ASN.1
  constructs which may be used.  These restrictions are explicitly made
  for simplicity.

  The encoding of an object type is simply how that object type is
  represented using the object type's syntax.  Implicitly tied to the
  notion of an object type's syntax and encoding is how the object type
  is represented when being transmitted on the network.

  The SMI specifies the use of the basic encoding rules of ASN.1 [8],
  subject to the additional requirements imposed by the SNMP.



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RFC 1724                  RIP-2 MIB Extension              November 1994


2.1 Format of Definitions

  Section 4 contains the specification of all object types contained in
  this MIB module.  The object types are defined using the conventions
  defined in the SMI, as amended by the extensions specified in [9].

3. Overview

3.1 Textual Conventions

  Several new data types are introduced as a textual convention in this
  MIB document.  These textual conventions enhance the readability of
  the specification and can ease comparison with other specifications
  if appropriate.  It should be noted that the introduction of the
  these textual conventions has no effect on either the syntax nor the
  semantics of any managed objects.  The use of these is merely an
  artifact of the explanatory method used.  Objects defined in terms of
  one of these methods are always encoded by means of the rules that
  define the primitive type.  Hence, no changes to the SMI or the SNMP
  are necessary to accommodate these textual conventions which are
  adopted merely for the convenience of readers and writers in pursuit
  of the elusive goal of clear, concise, and unambiguous MIB documents.

  The new data type is RouteTag. The RouteTag type represents the
  contents of the Route Domain field in the packet header or route
  entry.

3.2 Structure of MIB

  The RIP-2 MIB contains global counters, useful for detecting the
  deleterious effects of RIP incompatibilities; two "interfaces"
  tables, which contains interface-specific statistics and
  configuration information; and an optional "peer" table, containing
  information that may be helpful in debugging neighbor relationships.
  Like the protocol itself, this MIB takes great care to preserve
  compatibility with RIP-1 systems and controls for monitoring and
  controlling system interactions.

3.3 Modifications from RFC 1389

  The RIP-2 MIB was originally published in RFC 1389.  It encoded the
  concept of a Routing Domain, and did not address unnumbered
  interfaces.

  In the current version of the protocol, Route Domains are deprecated;
  therefore, they are deprecated in the MIB as well.  This means that
  the object rip2IfConfDomain is deprecated, and the object
  rip2PeerDomain (which cannot be deprecated, being an instance object)



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  must always be zero.

  Unnumbered interfaces are supported in this version.  Since the IP
  Address that the neighbor uses may be unknown to the system, a
  pseudo-address is used to identify these interfaces.  The pseudo-
  address is in the class A network 0.0.0.0, and the host number (the
  least significant 24 bits of the address) are the ifIndex value of
  the relevant IP Interface.  This is an additional new meaning of the
  objects rip2IfStatAddress and rip2IfConfAddress, backward compatible
  with the RFC 1389 usage.  The object rip2IfConfSrcAddress is added,
  to permit the configuration of the source address on an unnumbered
  interface, and the meaning of the object rip2PeerAddress is broadened
  to remain relevant on unnumbered interfaces.

  rip2IfConfSend is augmented with two values for the use of Demand RIP
  under RIP-I and RIP-II rules.  This avoids the necessity of a Demand
  RIP MIB.

  MD5 Authentication is supported.
































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RFC 1724                  RIP-2 MIB Extension              November 1994


4. Definitions

  RIPv2-MIB DEFINITIONS ::= BEGIN

  IMPORTS
      MODULE-IDENTITY, OBJECT-TYPE, Counter32,
      TimeTicks, IpAddress                     FROM SNMPv2-SMI
      TEXTUAL-CONVENTION, RowStatus            FROM SNMPv2-TC
      MODULE-COMPLIANCE, OBJECT-GROUP          FROM SNMPv2-CONF
      mib-2                                    FROM RFC1213-MIB;

  --  This MIB module uses the extended OBJECT-TYPE macro as
  --  defined in [9].

  rip2  MODULE-IDENTITY
          LAST-UPDATED "9407272253Z"      -- Wed Jul 27 22:53:04 PDT 1994
          ORGANIZATION "IETF RIP-II Working Group"
          CONTACT-INFO
         "       Fred Baker
         Postal: Cisco Systems
                 519 Lado Drive
                 Santa Barbara, California 93111
         Tel:    +1 805 681 0115
         E-Mail: [email protected]

         Postal: Gary Malkin
                 Xylogics, Inc.
                 53 Third Avenue
                 Burlington, MA  01803

         Phone:  (617) 272-8140
         EMail:  [email protected]"
     DESCRIPTION
        "The MIB module to describe the RIP2 Version 2 Protocol"
    ::= { mib-2 23 }

--  RIP-2 Management Information Base

-- the RouteTag type represents the contents of the
-- Route Domain field in the packet header or route entry.
-- The use of the Route Domain is deprecated.

RouteTag ::= TEXTUAL-CONVENTION
    STATUS      current
    DESCRIPTION
       "the RouteTag type represents the contents of the Route Domain
       field in the packet header or route entry"
   SYNTAX      OCTET STRING (SIZE (2))



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RFC 1724                  RIP-2 MIB Extension              November 1994


--4.1 Global Counters

--      The RIP-2 Globals Group.
--      Implementation of this group is mandatory for systems
--      which implement RIP-2.

-- These counters are intended to facilitate debugging quickly
-- changing routes or failing neighbors

rip2Globals OBJECT IDENTIFIER ::= { rip2 1 }

   rip2GlobalRouteChanges OBJECT-TYPE
       SYNTAX   Counter32
       MAX-ACCESS   read-only
       STATUS   current
       DESCRIPTION
          "The number of route changes made to the IP Route
          Database by RIP.  This does not include the refresh
          of a route's age."
      ::= { rip2Globals 1 }

   rip2GlobalQueries OBJECT-TYPE
       SYNTAX   Counter32
       MAX-ACCESS   read-only
       STATUS   current
       DESCRIPTION
          "The number of responses sent to RIP queries
          from other systems."
      ::= { rip2Globals 2 }

--4.2 RIP Interface Tables

--  RIP Interfaces Groups
--  Implementation of these Groups is mandatory for systems
--  which implement RIP-2.

-- The RIP Interface Status Table.

   rip2IfStatTable OBJECT-TYPE
       SYNTAX   SEQUENCE OF Rip2IfStatEntry
       MAX-ACCESS   not-accessible
       STATUS   current
       DESCRIPTION
          "A list of subnets which require separate
          status monitoring in RIP."
      ::= { rip2 2 }

  rip2IfStatEntry OBJECT-TYPE



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RFC 1724                  RIP-2 MIB Extension              November 1994


      SYNTAX   Rip2IfStatEntry
      MAX-ACCESS   not-accessible
      STATUS   current
      DESCRIPTION
         "A Single Routing Domain in a single Subnet."
     INDEX { rip2IfStatAddress }
     ::= { rip2IfStatTable 1 }

   Rip2IfStatEntry ::=
       SEQUENCE {
           rip2IfStatAddress
               IpAddress,
           rip2IfStatRcvBadPackets
               Counter32,
           rip2IfStatRcvBadRoutes
               Counter32,
           rip2IfStatSentUpdates
               Counter32,
           rip2IfStatStatus
               RowStatus
   }

   rip2IfStatAddress OBJECT-TYPE
       SYNTAX   IpAddress
       MAX-ACCESS   read-only
       STATUS   current
       DESCRIPTION
          "The IP Address of this system on the indicated
          subnet. For unnumbered interfaces, the value 0.0.0.N,
          where the least significant 24 bits (N) is the ifIndex
          for the IP Interface in network byte order."
      ::= { rip2IfStatEntry 1 }

   rip2IfStatRcvBadPackets OBJECT-TYPE
       SYNTAX   Counter32
       MAX-ACCESS   read-only
       STATUS   current
       DESCRIPTION
          "The number of RIP response packets received by
          the RIP process which were subsequently discarded
          for any reason (e.g. a version 0 packet, or an
          unknown command type)."
      ::= { rip2IfStatEntry 2 }

   rip2IfStatRcvBadRoutes OBJECT-TYPE
       SYNTAX   Counter32
       MAX-ACCESS   read-only
       STATUS   current



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RFC 1724                  RIP-2 MIB Extension              November 1994


       DESCRIPTION
          "The number of routes, in valid RIP packets,
          which were ignored for any reason (e.g. unknown
          address family, or invalid metric)."
      ::= { rip2IfStatEntry 3 }

   rip2IfStatSentUpdates OBJECT-TYPE
       SYNTAX   Counter32
       MAX-ACCESS   read-only
       STATUS   current
       DESCRIPTION
          "The number of triggered RIP updates actually
          sent on this interface.  This explicitly does
          NOT include full updates sent containing new
          information."
      ::= { rip2IfStatEntry 4 }

   rip2IfStatStatus OBJECT-TYPE
       SYNTAX   RowStatus
       MAX-ACCESS   read-create
       STATUS   current
       DESCRIPTION
          "Writing invalid has the effect of deleting
          this interface."
      ::= { rip2IfStatEntry 5 }

-- The RIP Interface Configuration Table.

   rip2IfConfTable OBJECT-TYPE
       SYNTAX   SEQUENCE OF Rip2IfConfEntry
       MAX-ACCESS   not-accessible
       STATUS   current
       DESCRIPTION
          "A list of subnets which require separate
          configuration in RIP."
      ::= { rip2 3 }

  rip2IfConfEntry OBJECT-TYPE
      SYNTAX   Rip2IfConfEntry
      MAX-ACCESS   not-accessible
      STATUS   current
      DESCRIPTION
         "A Single Routing Domain in a single Subnet."
     INDEX { rip2IfConfAddress }
     ::= { rip2IfConfTable 1 }

   Rip2IfConfEntry ::=
       SEQUENCE {



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RFC 1724                  RIP-2 MIB Extension              November 1994


           rip2IfConfAddress
               IpAddress,
           rip2IfConfDomain
               RouteTag,
           rip2IfConfAuthType
               INTEGER,
           rip2IfConfAuthKey
               OCTET STRING (SIZE(0..16)),
           rip2IfConfSend
               INTEGER,
           rip2IfConfReceive
               INTEGER,
           rip2IfConfDefaultMetric
               INTEGER,
           rip2IfConfStatus
               RowStatus,
           rip2IfConfSrcAddress
               IpAddress
   }

   rip2IfConfAddress OBJECT-TYPE
       SYNTAX   IpAddress
       MAX-ACCESS   read-only
       STATUS   current
       DESCRIPTION
          "The IP Address of this system on the indicated
          subnet.  For unnumbered interfaces, the value 0.0.0.N,
          where the least significant 24 bits (N) is the ifIndex
          for the IP Interface in network byte order."
      ::= { rip2IfConfEntry 1 }

   rip2IfConfDomain OBJECT-TYPE
       SYNTAX   RouteTag
       MAX-ACCESS   read-create
       STATUS   obsolete
       DESCRIPTION
          "Value inserted into the Routing Domain field
          of all RIP packets sent on this interface."
      DEFVAL { '0000'h }
      ::= { rip2IfConfEntry 2 }

   rip2IfConfAuthType OBJECT-TYPE
       SYNTAX   INTEGER {
                   noAuthentication (1),
                   simplePassword (2),
                   md5 (3)
                }
       MAX-ACCESS   read-create



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RFC 1724                  RIP-2 MIB Extension              November 1994


       STATUS   current
       DESCRIPTION
          "The type of Authentication used on this
          interface."
      DEFVAL { noAuthentication }
      ::= { rip2IfConfEntry 3 }

   rip2IfConfAuthKey OBJECT-TYPE
       SYNTAX   OCTET STRING (SIZE(0..16))
       MAX-ACCESS   read-create
       STATUS   current
       DESCRIPTION
          "The value to be used as the Authentication Key
          whenever the corresponding instance of
          rip2IfConfAuthType has a value other than
          noAuthentication.  A modification of the corresponding
          instance of rip2IfConfAuthType does not modify
          the rip2IfConfAuthKey value.  If a string shorter
          than 16 octets is supplied, it will be left-
          justified and padded to 16 octets, on the right,
          with nulls (0x00).

          Reading this object always results in an  OCTET
          STRING of length zero; authentication may not
          be bypassed by reading the MIB object."
      DEFVAL { ''h }
      ::= { rip2IfConfEntry 4 }

   rip2IfConfSend OBJECT-TYPE
       SYNTAX   INTEGER {
                   doNotSend (1),
                   ripVersion1 (2),
                   rip1Compatible (3),
                   ripVersion2 (4),
                   ripV1Demand (5),
                   ripV2Demand (6)
                }
       MAX-ACCESS   read-create
       STATUS   current
       DESCRIPTION
          "What the router sends on this interface.
          ripVersion1 implies sending RIP updates compliant
          with  RFC  1058.   rip1Compatible implies
          broadcasting RIP-2 updates using RFC 1058 route
          subsumption rules.  ripVersion2 implies
          multicasting RIP-2 updates.  ripV1Demand indicates
          the use of Demand RIP on a WAN interface under RIP
          Version 1 rules.  ripV2Demand indicates the use of



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RFC 1724                  RIP-2 MIB Extension              November 1994


          Demand RIP on a WAN interface under Version 2 rules."
      DEFVAL { rip1Compatible }
      ::= { rip2IfConfEntry 5 }

   rip2IfConfReceive OBJECT-TYPE
       SYNTAX   INTEGER {
                   rip1 (1),
                   rip2 (2),
                   rip1OrRip2 (3),
                   doNotRecieve (4)
                }
       MAX-ACCESS   read-create
       STATUS   current
       DESCRIPTION
          "This indicates which version of RIP updates
          are to be accepted.  Note that rip2 and
          rip1OrRip2 implies reception of multicast
          packets."
      DEFVAL { rip1OrRip2 }
      ::= { rip2IfConfEntry 6 }

   rip2IfConfDefaultMetric OBJECT-TYPE
       SYNTAX   INTEGER ( 0..15 )
       MAX-ACCESS   read-create
       STATUS   current
       DESCRIPTION
          "This variable indicates the metric that is to
          be used for the default route entry in RIP updates
          originated on this interface.  A value of zero
          indicates that no default route should be
          originated; in this case, a default route via
          another router may be propagated."
      ::= { rip2IfConfEntry 7 }

   rip2IfConfStatus OBJECT-TYPE
       SYNTAX   RowStatus
       MAX-ACCESS   read-create
       STATUS   current
       DESCRIPTION
          "Writing invalid has  the  effect  of  deleting
          this interface."
      ::= { rip2IfConfEntry 8 }

   rip2IfConfSrcAddress OBJECT-TYPE
       SYNTAX   IpAddress
       MAX-ACCESS   read-create
       STATUS   current
       DESCRIPTION



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RFC 1724                  RIP-2 MIB Extension              November 1994


          "The IP Address this system will use as a source
           address on this interface.  If it is a numbered
           interface, this MUST be the same value as
           rip2IfConfAddress.  On unnumbered interfaces,
           it must be the value of rip2IfConfAddress for
           some interface on the system."
      ::= { rip2IfConfEntry 9 }

--4.3 Peer Table

--  Peer Table

--      The RIP Peer Group
--      Implementation of this Group is Optional

--      This group provides information about active peer
--      relationships intended to assist in debugging.  An
--      active peer is a router from which a valid RIP
--      updated has been heard in the last 180 seconds.

   rip2PeerTable OBJECT-TYPE
       SYNTAX   SEQUENCE OF Rip2PeerEntry
       MAX-ACCESS   not-accessible
       STATUS   current
       DESCRIPTION
          "A list of RIP Peers."
      ::= { rip2 4 }

  rip2PeerEntry OBJECT-TYPE
      SYNTAX   Rip2PeerEntry
      MAX-ACCESS   not-accessible
      STATUS   current
      DESCRIPTION
         "Information regarding a single routing peer."
     INDEX { rip2PeerAddress, rip2PeerDomain }
     ::= { rip2PeerTable 1 }

   Rip2PeerEntry ::=
       SEQUENCE {
           rip2PeerAddress
               IpAddress,
           rip2PeerDomain
               RouteTag,
           rip2PeerLastUpdate
               TimeTicks,
           rip2PeerVersion
               INTEGER,
           rip2PeerRcvBadPackets



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RFC 1724                  RIP-2 MIB Extension              November 1994


               Counter32,
           rip2PeerRcvBadRoutes
               Counter32
           }

   rip2PeerAddress OBJECT-TYPE
       SYNTAX   IpAddress
       MAX-ACCESS   read-only
       STATUS   current
       DESCRIPTION
          "The IP Address that the peer is using as its source
           address.  Note that on an unnumbered link, this may
           not be a member of any subnet on the system."
      ::= { rip2PeerEntry 1 }

   rip2PeerDomain OBJECT-TYPE
       SYNTAX   RouteTag
       MAX-ACCESS   read-only
       STATUS   current
       DESCRIPTION
          "The value in the Routing Domain field  in  RIP
          packets received from the peer.  As domain suuport
          is deprecated, this must be zero."
      ::= { rip2PeerEntry 2 }

   rip2PeerLastUpdate OBJECT-TYPE
       SYNTAX   TimeTicks
       MAX-ACCESS   read-only
       STATUS   current
       DESCRIPTION
          "The value of sysUpTime when the most recent
          RIP update was received from this system."
      ::= { rip2PeerEntry 3 }

   rip2PeerVersion OBJECT-TYPE
       SYNTAX   INTEGER ( 0..255 )
       MAX-ACCESS   read-only
       STATUS   current
       DESCRIPTION
          "The RIP version number in the header of the
          last RIP packet received."
      ::= { rip2PeerEntry 4 }

   rip2PeerRcvBadPackets OBJECT-TYPE
       SYNTAX   Counter32
       MAX-ACCESS   read-only
       STATUS   current
       DESCRIPTION



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RFC 1724                  RIP-2 MIB Extension              November 1994


          "The number of RIP response packets from this
          peer discarded as invalid."
      ::= { rip2PeerEntry 5 }


   rip2PeerRcvBadRoutes OBJECT-TYPE
       SYNTAX   Counter32
       MAX-ACCESS   read-only
       STATUS   current
       DESCRIPTION
          "The number of routes from this peer that were
          ignored because the entry format was invalid."
      ::= { rip2PeerEntry 6 }






































Malkin & Baker                                                 [Page 14]

RFC 1724                  RIP-2 MIB Extension              November 1994


-- conformance information

rip2Conformance OBJECT IDENTIFIER ::= { rip2 5 }

rip2Groups      OBJECT IDENTIFIER ::= { rip2Conformance 1 }
rip2Compliances OBJECT IDENTIFIER ::= { rip2Conformance 2 }

-- compliance statements
rip2Compliance MODULE-COMPLIANCE
   STATUS  current
   DESCRIPTION
      "The compliance statement "
   MODULE  -- this module
   MANDATORY-GROUPS {
                rip2GlobalGroup,
                rip2IfStatGroup,
                rip2IfConfGroup,
                rip2PeerGroup
       }
   GROUP       rip2GlobalGroup
   DESCRIPTION
      "This group defines global controls for RIP-II systems."
   GROUP       rip2IfStatGroup
   DESCRIPTION
      "This group defines interface statistics for RIP-II systems."
   GROUP       rip2IfConfGroup
   DESCRIPTION
      "This group defines interface configuration for RIP-II systems."
   GROUP       rip2PeerGroup
   DESCRIPTION
      "This group defines peer information for RIP-II systems."
   ::= { rip2Compliances 1 }



















Malkin & Baker                                                 [Page 15]

RFC 1724                  RIP-2 MIB Extension              November 1994


-- units of conformance

rip2GlobalGroup    OBJECT-GROUP
   OBJECTS {
               rip2GlobalRouteChanges,
               rip2GlobalQueries
   }
   STATUS  current
   DESCRIPTION
      "This group defines global controls for RIP-II systems."
   ::= { rip2Groups 1 }
rip2IfStatGroup    OBJECT-GROUP
   OBJECTS {
           rip2IfStatAddress,
           rip2IfStatRcvBadPackets,
           rip2IfStatRcvBadRoutes,
           rip2IfStatSentUpdates,
           rip2IfStatStatus
   }
   STATUS  current
   DESCRIPTION
      "This group defines interface statistics for RIP-II systems."
   ::= { rip2Groups 2 }
rip2IfConfGroup    OBJECT-GROUP
   OBJECTS {
           rip2IfConfAddress,
           rip2IfConfAuthType,
           rip2IfConfAuthKey,
           rip2IfConfSend,
           rip2IfConfReceive,
           rip2IfConfDefaultMetric,
           rip2IfConfStatus,
           rip2IfConfSrcAddress
   }
   STATUS  current
   DESCRIPTION
      "This group defines interface configuration for RIP-II systems."
   ::= { rip2Groups 3 }
rip2PeerGroup    OBJECT-GROUP
   OBJECTS {
           rip2PeerAddress,
           rip2PeerDomain,
           rip2PeerLastUpdate,
           rip2PeerVersion,
           rip2PeerRcvBadPackets,
           rip2PeerRcvBadRoutes
   }
   STATUS  current



Malkin & Baker                                                 [Page 16]

RFC 1724                  RIP-2 MIB Extension              November 1994


   DESCRIPTION
      "This group defines peer information for RIP-II systems."
   ::= { rip2Groups 4 }
END

5. References

  [1] Cerf, V., "IAB Recommendations for the Development of Internet
      Network Management Standards", RFC 1052, IAB, April 1988.

  [2] Cerf, V., "Report of the Second Ad Hoc Network Management Review
      Group", RFC 1109, IAB, August 1989.

  [3] Rose M., and K. McCloghrie, "Structure and Identification of
      Management Information for TCP/IP-based internets", STD 16, RFC
      1155, Performance Systems International, Hughes LAN Systems, May
      1990.

  [4] McCloghrie K., and M. Rose, "Management Information Base for
      Network Management of TCP/IP-based internets", RFC 1156, Hughes
      LAN Systems, Performance Systems International, May 1990.

  [5] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple
      Network Management Protocol", STD 15, RFC 1157, SNMP Research,
      Performance Systems International, Performance Systems
      International, MIT Laboratory for Computer Science, May 1990.

  [6] Rose, M., Editor, "Management Information Base for Network
      Management of TCP/IP-based internets: MIB-II", RFC 1158,
      Performance Systems International, May 1990.

  [7] Information processing systems - Open Systems Interconnection -
      Specification of Abstract Syntax Notation One (ASN.1),
      International Organization for Standardization, International
      Standard 8824, December 1987.

  [8] Information processing systems - Open Systems Interconnection -
      Specification of Basic Encoding Rules for Abstract Notation One
      (ASN.1), International Organization for Standardization,
      International Standard 8825, December 1987.

  [9] Rose, M., and K. McCloghrie, Editors, "Concise MIB Definitions",
      STD 16, RFC 1212, Performance Systems International, Hughes LAN
      Systems, March 1991.

 [10] Malkin, G., "RIP Version 2 - Carrying Additional Information",
      RFC 1723, Xylogics, Inc., November 1994.




Malkin & Baker                                                 [Page 17]

RFC 1724                  RIP-2 MIB Extension              November 1994


 [11] Malkin, G., "RIP Version 2 Protocol Analysis", RFC 1721,
      Xylogics, Inc., November 1994.

 [12] Malkin, G., "RIP Version 2 Protocol Applicability Statement", RFC
      1722, Xylogics, Inc., November 1994.

6.  Security Considerations

  Security issues are not discussed in this memo.

7.  Authors' Addresses

  Gary Malkin
  Xylogics, Inc.
  53 Third Avenue
  Burlington, MA  01803

  Phone: (617) 272-8140
  EMail: [email protected]


  Fred Baker
  Cisco Systems
  519 Lado Drive
  Santa Barbara, California 93111

  Phone: 805-681-0115
  EMail: [email protected]























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