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Versions: 00 01 02 03 04 05 06 07 RFC 4292

  Internet-Draft                                     M. Wasserman, Editor
  Document: draft-ietf-ipv6-rfc2096-update-00.txt              Wind River
  Expires:  December 2002                                       June 2002
  
                            IP Forwarding Table MIB
  
  1  Status of this Memo
  
     This document is an Internet-Draft and is in full conformance with
     all provisions of Section 10 of RFC2026 [RFC2026].
  
     Internet-Drafts are working documents of the Internet Engineering
     Task Force (IETF), its areas, and its working groups.  Note that
     other groups may also distribute working documents as Internet-
     Drafts.
  
     Internet-Drafts are draft documents valid for a maximum of six
     months and may be updated, replaced, or obsoleted by other
     documents at any time.  It is inappropriate to use Internet-Drafts
     as reference material or to cite them other than as "work in
     progress."
  
     The list of current Internet-Drafts can be accessed at
          http://www.ietf.org/ietf/1id-abstracts.txt
     The list of Internet-Draft Shadow Directories can be accessed at
          http://www.ietf.org/shadow.html.
  
     This document is a product of the IPv6 MIB Revision Design Team and
     it is a working item of the IPv6 Working Group.  Comments should be
     addressed to the editor, or to the IPv6 Working Group mailing list
     at ipng@sunroof.eng.sun.com.
  
  2  Abstract
  
     This document 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 related to
     the forwarding of Internet Protocol (IP) packets, in an IP version
     independent manner.
  
  3  Copyright Notice
  
     Copyright (C) The Internet Society (2001).  All Rights Reserved.
  
  4  Conventions Used In This Document
  
     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].
  
  
  
  
  
  
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  5  Table of Contents
  
  
     1       Status of this Memo.......................................1
     2       Abstract..................................................1
     3       Copyright Notice..........................................1
     4       Conventions Used In This Document.........................1
     5       Table of Contents.........................................2
     6       Revision History..........................................2
     7       The SNMP Management Framework.............................4
     8       Overview..................................................5
     9       Definitions...............................................6
     10      Open Issues / To Do......................................27
     11      References...............................................28
     12      Authors and Acknowledgements.............................30
     13      Editor's Contact Information.............................30
     14      Full Copyright Statement.................................30
  
  
  6  Revision History
  
     Changes from draft-ietf-ipngwg-rfc-2096-update-00.txt:
  
      27 Jun 2001   Added inetCidrRouteDscp index and inetCidrRouteWeight
                    object to the inetCidrRouteTable.
  
                    Restored inetCidrRouteNextHopType variable (may be
                    different from inetCidrRouteDestType, due to global
                    vs. non-global distinction in new InetAddress TCs).
  
                    Removed inetCidrRouteInstance object. Use to identify
                    a conceptual routing table is obviated by new
                    InetAddress types and inclusion of DSCP index.
  
                    Changed editor, moved author information to end,
                    several editorial changes.
      13 Jul 2001   Removed inetCidrRouteNextHopType.
  
     Changes from draft-ops-rfc2096-update-00.txt:
  
      12 Jul 2001   Renamed to IPNG working group draft
                    Added scopes to the uses of instance
                    Added inetCidrRouteDiscards to replace
                    ipRoutingDiscards
                    Fixed some remaining ipCidr*/inetCidr* confusion in
                    DESCRIPTIONs
  
     Changes from first draft posted to v6mib mailing list:
  
      23 Feb 2001   Updated MODULE-IDENTITY
  
                    Deleted inetCidrRouteTos, add inetCidrRouteInstance
                    in INDEX of inetCidrRouteTable.
  
  
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                    Used InterfaceIndex, InetAddressPrefixLength and
                    InetAutonomousSystemNumber TC's, and limited the SIZE
                    of inetCidrRouteDest and inetCidrRouteNextHop
  
                    Updated conformance info.  Added copyright and table
                    of contents.
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
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  7  The SNMP Management Framework
  
     The SNMP Management Framework presently consists of five major
     components:
  
          - An overall architecture, described in RFC 2571 [2].
  
          - 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 [3], STD 16, RFC 1212 [4]
             and RFC 1215 [5]. The second version, called SMIv2, is
             described in STD 58, RFC 2578 [6], STD 58, RFC 2579 [7] and
             STD 58, RFC 2580 [8].
  
          - Message protocols for transferring management information.
             The first version of the SNMP message protocol is called
             SNMPv1 and described in STD 15, RFC 1157 [9]. A second
             version of the SNMP message protocol,which is not an
             Internet standards track protocol, is called SNMPv2c and
             described in RFC 1901 [10] and RFC 1906 [11]. The third
             version of the message protocol is called SNMPv3 and
             described in RFC 1906 [11],RFC 2572 [12] and RFC 2574 [13].
  
          - Protocol operations for accessing management information.
             The first set of protocol operations and associated PDU
             formats is described in STD 15, RFC 1157 [9]. A second set
             of protocol operations and associated PDU formats is
             described in RFC 1905 [14].
  
          - A set of fundamental applications described in RFC 2573 [15]
             and the view-based access control mechanism described in RFC
             2575 [16].
  
     A more detailed introduction to the current SNMP Management
     framework can be found in RFC 2570 [17].
  
     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.
  
     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.
  
  
  
  
  
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  8  Overview
  
     The MIB consists of one current table and two current global
     objects.
  
          1. The object inetCidrForwardNumber indicates the number of
             current routes.  This is primarily to avoid having to read
             the table in order to determine this number.
  
          2. The object inetCidrForwardDiscards counts the number of
             valid routes that were discarded for any reason.
  
          3. The inetCidrRouteTable provides the ability to display IP
             version independent multipath CIDR routes.
  
     In addition, there is one deprecated table and object, and one
     obsolete table and object, representing previous revisions of this
     MIB.
  
          1. The obsolete object ipForwardNumber represents the number of
             entries in the obsolete ipForwardTable.
  
          2. The obsolete ipForwardTable updates the RFC 1213
             ipRouteTable to display multipath IP Routes.  This is in
             turn obsoleted by the ipCidrRouteTable.
  
          3. The deprecated object ipCidrRouteNumber represents the
             number of entries in the deprecated ipCidrRouteTable.
  
          4. The deprecated ipCidrRouteTable updates the RFC 1213
             ipRouteTable to display multipath IP Routes having the same
             network number but differing network masks.
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
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  9  Definitions
  
     IP-FORWARD-MIB DEFINITIONS ::= BEGIN
  
     IMPORTS
         MODULE-IDENTITY, OBJECT-TYPE,
         IpAddress, Integer32, Gauge32,
         Unsigned32, Counter32              FROM SNMPv2-SMI
         RowStatus                          FROM SNMPv2-TC
         MODULE-COMPLIANCE, OBJECT-GROUP    FROM SNMPv2-CONF
         InterfaceIndex                     FROM IF-MIB
         ip                                 FROM IP-MIB
         IANAipRouteProtocol                FROM IANA-RTPROTO-MIB
         InetAddress, InetAddressType,
         InetAddressPrefixLength,
         InetAutonomousSystemNumber         FROM INET-ADDRESS-MIB;
  
     ipForward MODULE-IDENTITY
         LAST-UPDATED "200107130000Z"
         ORGANIZATION "IETF IPv6 MIB Revision Team"
         CONTACT-INFO
                "Editor:
                 Margaret Wasserman
                 Wind River
                 10 Tara Blvd, Suite 330
                 Nashua, NH 03062
  
                 Phone: +1 603 897-2067
                 Email: <mrw@windriver.com>"
         DESCRIPTION
                "The MIB module for the management of CIDR multipath IP
                 Routes."
         REVISION      "200206270000Z"
         DESCRIPTION
                "IP version neutral revision, published as RFC XXXX."
         REVISION      "9609190000Z"
         DESCRIPTION
                "Revised to support CIDR routes."
         ::= { ip 24 }
  
     inetCidrRouteNumber OBJECT-TYPE
         SYNTAX     Gauge32
         MAX-ACCESS read-only
         STATUS     current
         DESCRIPTION
                "The number of current inetCidrRouteTable entries that
                 are not invalid."
     ::= { ipForward 6 }
  
     inetCidrRouteDiscards OBJECT-TYPE
         SYNTAX     Counter32
         MAX-ACCESS read-only
         STATUS     current
  
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         DESCRIPTION
                "The number of routing entries which were chosen to be
                 discarded even though they are valid.  One possible
                 reason for discarding such an entry could be to free-up
                 buffer space for other routing entries."
         ::= { ipForward 8 }
  
     --  Inet CIDR Route Table
  
     --  The Inet CIDR Route Table deprecates and replaces the
     --  ipCidrRoute Table currently in the IP Forwarding Table MIB.
     --  It adds IP protocol independence.
  
     inetCidrRouteTable OBJECT-TYPE
         SYNTAX     SEQUENCE OF InetCidrRouteEntry
         MAX-ACCESS not-accessible
         STATUS     current
         DESCRIPTION
                "This entity's IP Routing table."
         REFERENCE
                "RFC 1213 Section 6.6, The IP Group"
         ::= { ipForward 7 }
  
     inetCidrRouteEntry OBJECT-TYPE
         SYNTAX     InetCidrRouteEntry
         MAX-ACCESS not-accessible
         STATUS     current
         DESCRIPTION
                "A particular route to a particular destination, under a
                 particular policy."
         INDEX {
             inetCidrRouteDestType,
             inetCidrRouteDest,
             inetCidrRoutePfxLen,
             inetCidrRouteDscp,
             inetCidrRouteNextHopType,
             inetCidrRouteNextHop
             }
         ::= { inetCidrRouteTable 1 }
  
     InetCidrRouteEntry ::= SEQUENCE {
             inetCidrRouteDestType     InetAddressType,
             inetCidrRouteDest         InetAddress,
             inetCidrRoutePfxLen       InetAddressPrefixLength,
             inetCidrRouteDscp,        Octet,
             inetCidrRouteNextHopType  InetAddressType,
             inetCidrRouteNextHop      InetAddress,
             inetCidrRouteIfIndex      InterfaceIndex,
             inetCidrRouteType         INTEGER,
             inetCidrRouteProto        IANAipRouteProtocol,
             inetCidrRouteAge          Integer32,
             inetCidrRouteNextHopAS    InetAutonomousSystemNumber,
             inetCidrRouteMetric1      Integer32,
             inetCidrRouteMetric2      Integer32,
  
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             inetCidrRouteMetric3      Integer32,
             inetCidrRouteMetric4      Integer32,
             inetCidrRouteMetric5      Integer32,
             inetCidrRouteStatus       RowStatus
         }
  
     inetCidrRouteDestType OBJECT-TYPE
         SYNTAX     InetAddressType
         MAX-ACCESS not-accessible
         STATUS     current
         DESCRIPTION
                "The type of the inetCidrRouteDest address, as defined
                 in the InetAddress MIB [19]"
         ::= { inetCidrRouteEntry 1 }
  
     inetCidrRouteDest OBJECT-TYPE
         SYNTAX     InetAddress (SIZE(0..36))
         MAX-ACCESS not-accessible
         STATUS     current
         DESCRIPTION
                "The destination IP address of this route.
  
                 Any assignment (implicit or otherwise) of an instance
                 of this object to a value x MUST be rejected if the
                 bitwise logical-AND of x with the value of the mask
                 formed from the corresponding instance of the
                 inetCidrRoutePfxLen object is not equal to x."
         ::= { inetCidrRouteEntry 2 }
  
     inetCidrRoutePfxLen OBJECT-TYPE
         SYNTAX     InetAddressPrefixLength
         MAX-ACCESS not-accessible
         STATUS     current
         DESCRIPTION
                "Indicates the number of leading one bits which form the
                 mask to be logical-ANDed with the destination address
                 before being compared to the value in the
                 inetCidrRouteDest field.
  
                 Any assignment (implicit or otherwise) of an instance
                 of this object to a value x MUST be rejected if the
                 bitwise logical-AND of the mask formed from x with the
                 value of the corresponding instance of the
                 inetCidrRouteDest object is not equal to
                 inetCidrRouteDest."
         ::= { inetCidrRouteEntry 3 }
  
     inetCidrRouteDscp OBJECT-TYPE
         SYNTAX     Octet
         MAX-ACCESS read-only
         STATUS     deprecated
         DESCRIPTION
                "Indicates the Differentiated Services Code Point (DSCP)
                 [18] to which the routing information in this entry
  
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                 applies.
  
                 The field is formatted as follows:
  
                      0   1   2   3   4   5   6   7
                    +---+---+---+---+---+---+---+---+
                    |         DSCP          |  CU   |
                    +---+---+---+---+---+---+---+---+
  
                    DSCP: differentiated services codepoint
                    CU: currently unused
  
                 The first three bits (0-2) of the DSCP are compatible
                 with the defined per-hop-behaviours for the IP
                 preference field. The remaining three bits can be used
                 to further discriminate the level and type of service
                 indicated. "
         ::= { ipCidrRouteEntry 4 }
  
     inetCidrRouteNextHopType OBJECT-TYPE
         SYNTAX     InetAddressType
         MAX-ACCESS not-accessible
         STATUS     current
         DESCRIPTION
                "The type of the inetCidrRouteNextHop address, as
                 defined in the InetAddress MIB [19].
  
                 Value should be set to unknown(0) for non-remote
                 routes."
         ::= { inetCidrRouteEntry 5 }
  
     inetCidrRouteNextHop OBJECT-TYPE
         SYNTAX     InetAddress (SIZE(0..36))
         MAX-ACCESS not-accessible
         STATUS     current
         DESCRIPTION
                "On remote routes, the address of the next system en
                 route.  For non-remote routes, a zero length string."
         ::= { inetCidrRouteEntry 6 }
  
     inetCidrRouteIfIndex OBJECT-TYPE
         SYNTAX     InterfaceIndex
         MAX-ACCESS read-create
         STATUS     current
         DESCRIPTION
                "The ifIndex value which identifies the local interface
                 through which the next hop of this route should be
                 reached."
         ::= { inetCidrRouteEntry 7 }
  
     inetCidrRouteType OBJECT-TYPE
         SYNTAX     INTEGER {
                     other    (1), -- not specified by this MIB
                     reject   (2), -- route which discards traffic and
  
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                                   --   returns ICMP notification
                     local    (3), -- local interface
                     remote   (4), -- remote destination
                     blackhole(5)  -- route which discards traffic
                                   --   silently
                  }
         MAX-ACCESS read-create
         STATUS     current
         DESCRIPTION
                "The type of route.  Note that local(3) refers to a
                 route for which the next hop is the final destination;
                 remote(4)refers to a route for which the next hop is
                 not the final destination.
  
                 Routes which do not result in traffic forwarding or
                 rejection should not be displayed even if the
                 implementation keeps them stored internally.
  
                 reject(2) refers to a route which, if matched, discards
                 the message as unreachable and returns a notification
                 (e.g. ICMP error) to the message sender.  This is used
                 in some protocols as a means of correctly aggregating
                 routes.
  
                 blackhole(5) refers to a route which, if matched,
                 discards the message silently."
         ::= { inetCidrRouteEntry 8 }
  
     inetCidrRouteProto OBJECT-TYPE
         SYNTAX     IANAipRouteProtocol
         MAX-ACCESS read-only
         STATUS     current
         DESCRIPTION
                "The routing mechanism via which this route was learned.
                 Inclusion of values for gateway routing protocols is
                 not intended to imply that hosts should support those
                 protocols."
         ::= { inetCidrRouteEntry 9 }
  
     inetCidrRouteAge OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-only
         STATUS     current
         DESCRIPTION
                "The number of seconds since this route was last updated
                 or otherwise determined to be correct.  Note that no
                 semantics of `too old' can be implied except through
                 knowledge of the routing protocol by which the route
                 was learned."
         ::= { inetCidrRouteEntry 10 }
  
     inetCidrRouteNextHopAS OBJECT-TYPE
         SYNTAX     InetAutonomousSystemNumber
         MAX-ACCESS read-create
  
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         STATUS     current
         DESCRIPTION
                "The Autonomous System Number of the Next Hop.  The
                 semantics of this object are determined by the routing-
                 protocol specified in the route's inetCidrRouteProto
                 value. When this object is unknown or not relevant its
                 value should be set to zero."
         DEFVAL { 0 }
         ::= { inetCidrRouteEntry 11 }
  
     inetCidrRouteMetric1 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     current
         DESCRIPTION
                "The primary routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's inetCidrRouteProto
                 value.  If this metric is not used, its value should be
                 set to -1."
         DEFVAL { -1 }
         ::= { inetCidrRouteEntry 12 }
  
     inetCidrRouteMetric2 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     current
         DESCRIPTION
                "An alternate routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's inetCidrRouteProto
                 value.  If this metric is not used, its value should be
                 set to -1."
         DEFVAL { -1 }
         ::= { inetCidrRouteEntry 13 }
  
     inetCidrRouteMetric3 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     current
         DESCRIPTION
                "An alternate routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's inetCidrRouteProto
                 value.  If this metric is not used, its value should be
                 set to -1."
         DEFVAL { -1 }
         ::= { inetCidrRouteEntry 14 }
  
     inetCidrRouteMetric4 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     current
         DESCRIPTION
  
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                "An alternate routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's inetCidrRouteProto
                 value.  If this metric is not used, its value should be
                 set to -1."
         DEFVAL { -1 }
         ::= { inetCidrRouteEntry 15 }
  
     inetCidrRouteMetric5 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     current
         DESCRIPTION
                "An alternate routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's inetCidrRouteProto
                 value.  If this metric is not used, its value should be
                 set to -1."
         DEFVAL { -1 }
         ::= { inetCidrRouteEntry 16 }
  
     inetCidrRouteWeight OBJECT-TYPE
         SYNTAX     Unsigned32
         MAX-ACCESS read-only
         STATUS     current
         DESCRIPTION
                "The system internal weight value for this route.
                 The semantics of this value are determined by
                 the implementation. Generally, when multiple paths
                 are available, the route with the lowest weight
                 value will be preferred.  Implementations that do
                 not include a weighting concept should return 0
                 for all entries."
         ::= { inetCidrRouteEntry 17 }
  
     inetCidrRouteStatus OBJECT-TYPE
         SYNTAX     RowStatus
         MAX-ACCESS read-create
         STATUS     current
         DESCRIPTION
                "The row status variable, used according to row
                 installation and removal conventions."
         ::= { inetCidrRouteEntry 18 }
  
     --  Conformance information
  
     ipForwardConformance
          OBJECT IDENTIFIER ::= { ipForward 5 }
  
     ipForwardGroups
          OBJECT IDENTIFIER ::= { ipForwardConformance 1 }
  
     ipForwardCompliances
          OBJECT IDENTIFIER ::= { ipForwardConformance 2 }
  
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     --  Compliance statements
  
     ipForwardCompliance2 MODULE-COMPLIANCE
         STATUS     current
         DESCRIPTION
                "The compliance statement for systems which have routing
                 tables.  XXX is this right?"
        MODULE -- this module
        MANDATORY-GROUPS { inetForwardCidrRouteGroup }
        ::= { ipForwardCompliances 3 }
  
     -- units of conformance
  
     inetForwardCidrRouteGroup OBJECT-GROUP
         OBJECTS { inetCidrRouteNumber, inetCidrRouteDiscards,
                   inetCidrRouteIfIndex, inetCidrRouteType,
                   inetCidrRouteProto, inetCidrRouteAge,
                   inetCidrRouteNextHopAS, inetCidrRouteMetric1,
                   inetCidrRouteMetric2, inetCidrRouteMetric3,
                   inetCidrRouteMetric4, inetCidrRouteMetric5,
                   inetCidrRouteStatus
             }
         STATUS     current
         DESCRIPTION
                "The IP version independent CIDR Route Table."
         ::= { ipForwardGroups 4 }
  
     --  Deprecated Objects
  
     ipCidrRouteNumber OBJECT-TYPE
         SYNTAX     Gauge32
         MAX-ACCESS read-only
         STATUS     deprecated
         DESCRIPTION
                "The number of current ipCidrRouteTable entries that are
                 not invalid.  This object is deprecated in favor of
                 inetCidrRouteNumber and the inetCidrRouteTable."
         ::= { ipForward 3 }
  
     --  IP CIDR Route Table
  
     --  The IP CIDR Route Table obsoletes and replaces the ipRoute
     --  Table current in MIB-I and MIB-II and the IP Forwarding Table.
     --  It adds knowledge of the autonomous system of the next hop,
     --  multiple next hops, and policy routing, and Classless
     --  Inter-Domain Routing.
  
     ipCidrRouteTable OBJECT-TYPE
         SYNTAX     SEQUENCE OF IpCidrRouteEntry
         MAX-ACCESS not-accessible
         STATUS     deprecated
         DESCRIPTION
                "This entity's IP Routing table.  This table has been
  
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                 deprecated in favor of the IP version neutral
                 inetCidrRouteTable."
         REFERENCE
                "RFC 1213 Section 6.6, The IP Group"
         ::= { ipForward 4 }
  
     ipCidrRouteEntry OBJECT-TYPE
         SYNTAX     IpCidrRouteEntry
         MAX-ACCESS not-accessible
         STATUS     deprecated
         DESCRIPTION
                "A particular route to a particular destination, under a
                 particular policy."
         INDEX {
             ipCidrRouteDest,
             ipCidrRouteMask,
             ipCidrRouteTos,
             ipCidrRouteNextHop
             }
         ::= { ipCidrRouteTable 1 }
  
     IpCidrRouteEntry ::= SEQUENCE {
             ipCidrRouteDest       IpAddress,
             ipCidrRouteMask       IpAddress,
             ipCidrRouteTos        Integer32,
             ipCidrRouteNextHop    IpAddress,
             ipCidrRouteIfIndex    Integer32,
             ipCidrRouteType       INTEGER,
             ipCidrRouteProto      INTEGER,
             ipCidrRouteAge        Integer32,
             ipCidrRouteInfo       OBJECT IDENTIFIER,
             ipCidrRouteNextHopAS  Integer32,
             ipCidrRouteMetric1    Integer32,
             ipCidrRouteMetric2    Integer32,
             ipCidrRouteMetric3    Integer32,
             ipCidrRouteMetric4    Integer32,
             ipCidrRouteMetric5    Integer32,
             ipCidrRouteStatus     RowStatus
         }
  
     ipCidrRouteDest OBJECT-TYPE
         SYNTAX     IpAddress
         MAX-ACCESS read-only
         STATUS     deprecated
         DESCRIPTION
                "The destination IP address of this route.
  
                 This object may not take a Multicast (Class D) address
                 value.
  
                 Any assignment (implicit or otherwise) of an instance
                 of this object to a value x must be rejected if the
                 bitwise logical-AND of x with the value of the
                 corresponding instance of the ipCidrRouteMask object is
  
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                 not equal to x."
         ::= { ipCidrRouteEntry 1 }
  
     ipCidrRouteMask OBJECT-TYPE
         SYNTAX     IpAddress
         MAX-ACCESS read-only
         STATUS     deprecated
         DESCRIPTION
                "Indicate the mask to be logical-ANDed with the
                 destination address before being compared to the value
                 in the ipCidrRouteDest field.  For those systems that
                 do not support arbitrary subnet masks, an agent
                 constructs the value of the ipCidrRouteMask by
                 reference to the IP Address Class.
  
                 Any assignment (implicit or otherwise) of an instance
                 of this object to a value x must be rejected if the
                 bitwise logical-AND of x with the value of the
                 corresponding instance of the ipCidrRouteDest object is
                 not equal to ipCidrRouteDest."
         ::= { ipCidrRouteEntry 2 }
  
     -- The following convention is included for specification
     -- of TOS Field contents.  At this time, the Host Requirements
     -- and the Router Requirements documents disagree on the width
     -- of the TOS field.  This mapping describes the Router
     -- Requirements mapping, and leaves room to widen the TOS field
     -- without impact to fielded systems.
  
     ipCidrRouteTos OBJECT-TYPE
         SYNTAX     Integer32 (0..2147483647)
         MAX-ACCESS read-only
         STATUS     deprecated
         DESCRIPTION
                "The policy specifier is the IP TOS Field.  The encoding
                 of IP TOS is as specified by the following convention.
                 Zero indicates the default path if no more specific
                 policy applies.
  
                 +-----+-----+-----+-----+-----+-----+-----+-----+
                 |                 |                       |     |
                 |   PRECEDENCE    |    TYPE OF SERVICE    |  0  |
                 |                 |                       |     |
                 +-----+-----+-----+-----+-----+-----+-----+-----+
  
                              IP TOS                IP TOS
                    Field     Policy      Field     Policy
                    Contents    Code      Contents    Code
                    0 0 0 0  ==>   0      0 0 0 1  ==>   2
                    0 0 1 0  ==>   4      0 0 1 1  ==>   6
                    0 1 0 0  ==>   8      0 1 0 1  ==>  10
                    0 1 1 0  ==>  12      0 1 1 1  ==>  14
                    1 0 0 0  ==>  16      1 0 0 1  ==>  18
                    1 0 1 0  ==>  20      1 0 1 1  ==>  22
  
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                    1 1 0 0  ==>  24      1 1 0 1  ==>  26
                    1 1 1 0  ==>  28      1 1 1 1  ==>  30"
         ::= { ipCidrRouteEntry 3 }
  
     ipCidrRouteNextHop OBJECT-TYPE
         SYNTAX     IpAddress
         MAX-ACCESS read-only
         STATUS     deprecated
         DESCRIPTION
                "On remote routes, the address of the next system en
                 route; Otherwise, 0.0.0.0."
         ::= { ipCidrRouteEntry 4 }
  
     ipCidrRouteIfIndex OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     deprecated
         DESCRIPTION
                "The ifIndex value which identifies  the local interface
                 through which the next hop of this route should be
                 reached."
         DEFVAL { 0 }
         ::= { ipCidrRouteEntry 5 }
  
     ipCidrRouteType OBJECT-TYPE
         SYNTAX     INTEGER {
                     other    (1), -- not specified by this MIB
                     reject   (2), -- route which discards traffic
                     local    (3), -- local interface
                     remote   (4)  -- remote destination
                  }
         MAX-ACCESS read-create
         STATUS     deprecated
         DESCRIPTION
                "The type of route.  Note that local(3) refers to a
                 route for which the next hop is the final destination;
                 remote(4) refers to a route for which the next hop is
                 not the final destination.
  
                 Routes which do not result in traffic forwarding or
                 rejection should not be displayed even if the
                 implementation keeps them stored internally.
  
                 reject (2) refers to a route which, if matched,
                 discards the message as unreachable. This is used in
                 some protocols as a means of correctly aggregating
                 routes."
         ::= { ipCidrRouteEntry 6 }
  
     ipCidrRouteProto OBJECT-TYPE
         SYNTAX     INTEGER {
                     other     (1),  -- not specified
                     local     (2),  -- local interface
                     netmgmt   (3),  -- static route
  
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                     icmp      (4),  -- result of ICMP Redirect
  
                             -- the following are all dynamic
                             -- routing protocols
                     egp        (5),  -- Exterior Gateway Protocol
                     ggp        (6),  -- Gateway-Gateway Protocol
                     hello      (7),  -- FuzzBall HelloSpeak
                     rip        (8),  -- Berkeley RIP or RIP-II
                     isIs       (9),  -- Dual IS-IS
                     esIs       (10), -- ISO 9542
                     ciscoIgrp  (11), -- Cisco IGRP
                     bbnSpfIgp  (12), -- BBN SPF IGP
                     ospf       (13), -- Open Shortest Path First
                     bgp        (14), -- Border Gateway Protocol
                     idpr       (15), -- InterDomain Policy Routing
                     ciscoEigrp (16)  -- Cisco EIGRP
                  }
         MAX-ACCESS read-only
         STATUS     deprecated
         DESCRIPTION
                "The routing mechanism via which this route was learned.
                 Inclusion of values for gateway routing protocols is
                 not intended to imply that hosts should support those
                 protocols."
         ::= { ipCidrRouteEntry 7 }
  
     ipCidrRouteAge OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-only
         STATUS     deprecated
         DESCRIPTION
                "The number of seconds since this route was last updated
                 or otherwise determined to be correct.  Note that no
                 semantics of `too old' can be implied except through
                 knowledge of the routing protocol by which the route
                 was learned."
         DEFVAL  { 0 }
         ::= { ipCidrRouteEntry 8 }
  
     ipCidrRouteInfo OBJECT-TYPE
         SYNTAX     OBJECT IDENTIFIER
         MAX-ACCESS read-create
         STATUS     deprecated
         DESCRIPTION
                "A reference to MIB definitions specific to the
                 particular routing protocol which is responsible for
                 this route, as determined by the value specified in the
                 route's ipCidrRouteProto value.  If this information is
                 not present, its value should be set to the OBJECT
                 IDENTIFIER { 0 0 }, which is a syntactically valid
                 object identifier, and any implementation conforming to
                 ASN.1 and the Basic Encoding Rules must be able to
                 generate and recognize this value."
         ::= { ipCidrRouteEntry 9 }
  
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     ipCidrRouteNextHopAS OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     deprecated
         DESCRIPTION
                "The Autonomous System Number of the Next Hop.  The
                 semantics of this object are determined by the routing-
                 protocol specified in the route's ipCidrRouteProto
                 value. When this object is unknown or not relevant its
                 value should be set to zero."
         DEFVAL { 0 }
         ::= { ipCidrRouteEntry 10 }
  
     ipCidrRouteMetric1 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     deprecated
         DESCRIPTION
                "The primary routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's ipCidrRouteProto
                 value.  If this metric is not used, its value should be
                 set to -1."
         DEFVAL { -1 }
         ::= { ipCidrRouteEntry 11 }
  
     ipCidrRouteMetric2 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     deprecated
         DESCRIPTION
                "An alternate routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's ipCidrRouteProto
                 value.  If this metric is not used, its value should be
                 set to -1."
         DEFVAL { -1 }
         ::= { ipCidrRouteEntry 12 }
  
     ipCidrRouteMetric3 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     deprecated
         DESCRIPTION
                "An alternate routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's ipCidrRouteProto
                 value.  If this metric is not used, its value should be
                 set to -1."
         DEFVAL { -1 }
         ::= { ipCidrRouteEntry 13 }
  
     ipCidrRouteMetric4 OBJECT-TYPE
  
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         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     deprecated
         DESCRIPTION
                "An alternate routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's ipCidrRouteProto
                 value.  If this metric is not used, its value should be
                 set to -1."
         DEFVAL { -1 }
         ::= { ipCidrRouteEntry 14 }
  
     ipCidrRouteMetric5 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     deprecated
         DESCRIPTION
                "An alternate routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's ipCidrRouteProto
                 value.  If this metric is not used, its value should be
                 set to -1."
         DEFVAL { -1 }
         ::= { ipCidrRouteEntry 15 }
  
     ipCidrRouteStatus OBJECT-TYPE
         SYNTAX     RowStatus
         MAX-ACCESS read-create
         STATUS     deprecated
         DESCRIPTION
                "The row status variable, used according to row
                 installation and removal conventions."
         ::= { ipCidrRouteEntry 16 }
  
  
  
     -- compliance statements
  
     ipForwardCompliance MODULE-COMPLIANCE
         STATUS     deprecated
         DESCRIPTION
                "The compliance statement for SNMPv2 entities which
                 implement the ipForward MIB."
  
        MODULE  -- this module
        MANDATORY-GROUPS { ipForwardCidrRouteGroup }
  
        ::= { ipForwardCompliances 1 }
  
     -- units of conformance
  
     ipForwardCidrRouteGroup OBJECT-GROUP
         OBJECTS { ipCidrRouteNumber,
                   ipCidrRouteDest, ipCidrRouteMask, ipCidrRouteTos,
  
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                   ipCidrRouteNextHop, ipCidrRouteIfIndex,
                   ipCidrRouteType, ipCidrRouteProto, ipCidrRouteAge,
                   ipCidrRouteInfo,ipCidrRouteNextHopAS,
                   ipCidrRouteMetric1, ipCidrRouteMetric2,
                   ipCidrRouteMetric3, ipCidrRouteMetric4,
                   ipCidrRouteMetric5, ipCidrRouteStatus
             }
         STATUS     deprecated
         DESCRIPTION
                "The CIDR Route Table."
         ::= { ipForwardGroups 3 }
  
     -- Obsoleted Definitions - Objects
  
     ipForwardNumber OBJECT-TYPE
         SYNTAX     Gauge32
         MAX-ACCESS read-only
         STATUS     obsolete
         DESCRIPTION
                "The number of current ipForwardTable entries that are
                 not invalid."
         ::= { ipForward 1 }
  
     --  IP Forwarding Table
  
     --  The IP Forwarding Table obsoletes and replaces the ipRoute
     --  Table current in MIB-I and MIB-II.  It adds knowledge of
     --  the autonomous system of the next hop, multiple next hop
     --  support, and policy routing support.
  
     ipForwardTable OBJECT-TYPE
         SYNTAX     SEQUENCE OF IpForwardEntry
         MAX-ACCESS not-accessible
         STATUS     obsolete
         DESCRIPTION
                "This entity's IP Routing table."
         REFERENCE
                "RFC 1213 Section 6.6, The IP Group"
         ::= { ipForward 2 }
  
     ipForwardEntry OBJECT-TYPE
         SYNTAX     IpForwardEntry
         MAX-ACCESS not-accessible
         STATUS     obsolete
         DESCRIPTION
                "A particular route to a particular destination, under a
                 particular policy."
         INDEX {
             ipForwardDest,
             ipForwardProto,
             ipForwardPolicy,
             ipForwardNextHop
             }
         ::= { ipForwardTable 1 }
  
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     IpForwardEntry ::= SEQUENCE {
             ipForwardDest       IpAddress,
             ipForwardMask       IpAddress,
             ipForwardPolicy     Integer32,
             ipForwardNextHop    IpAddress,
             ipForwardIfIndex    Integer32,
             ipForwardType       INTEGER,
             ipForwardProto      INTEGER,
             ipForwardAge        Integer32,
             ipForwardInfo       OBJECT IDENTIFIER,
             ipForwardNextHopAS  Integer32,
             ipForwardMetric1    Integer32,
             ipForwardMetric2    Integer32,
             ipForwardMetric3    Integer32,
             ipForwardMetric4    Integer32,
             ipForwardMetric5    Integer32
         }
  
     ipForwardDest OBJECT-TYPE
         SYNTAX     IpAddress
         MAX-ACCESS read-only
         STATUS     obsolete
         DESCRIPTION
                "The destination IP address of this route.  An entry
                 with a value of 0.0.0.0 is considered a default route.
  
                 This object may not take a Multicast (Class D) address
                 value.
  
                 Any assignment (implicit or otherwise) of an instance
                 of this object to a value x must be rejected if the
                 bitwise logical-AND of x with the value of the
                 corresponding instance of the ipForwardMask object is
                 not equal to x."
         ::= { ipForwardEntry 1 }
  
     ipForwardMask OBJECT-TYPE
         SYNTAX     IpAddress
         MAX-ACCESS read-create
         STATUS     obsolete
         DESCRIPTION
                "Indicate the mask to be logical-ANDed with the
                 destination address before being compared to the value
                 in the ipForwardDest field.  For those systems that do
                 not support arbitrary subnet masks, an agent constructs
                 the value of the ipForwardMask by reference to the IP
                 Address Class.
  
                 Any assignment (implicit or otherwise) of an instance
                 of this object to a value x must be rejected if the
                 bitwise logical-AND of x with the value of the
                 corresponding instance of the ipForwardDest object is
                 not equal to ipForwardDest."
  
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         DEFVAL { '00000000'h }      -- 0.0.0.0
         ::= { ipForwardEntry 2 }
  
     -- The following convention is included for specification
     -- of TOS Field contents.  At this time, the Host Requirements
     -- and the Router Requirements documents disagree on the width
     -- of the TOS field.  This mapping describes the Router
     -- Requirements mapping, and leaves room to widen the TOS field
     -- without impact to fielded systems.
  
     ipForwardPolicy OBJECT-TYPE
         SYNTAX     Integer32 (0..2147483647)
         MAX-ACCESS read-only
         STATUS     obsolete
         DESCRIPTION
                "The general set of conditions that would cause
                 the selection of one multipath route (set of
                 next hops for a given destination) is referred
                 to as 'policy'.
  
                 Unless the mechanism indicated by ipForwardProto
                 specifies otherwise, the policy specifier is
                 the IP TOS Field.  The encoding of IP TOS is as
                 specified by the following convention.  Zero
                 indicates the default path if no more specific
                 policy applies.
  
                 +-----+-----+-----+-----+-----+-----+-----+-----+
                 |                 |                       |     |
                 |   PRECEDENCE    |    TYPE OF SERVICE    |  0  |
                 |                 |                       |     |
                 +-----+-----+-----+-----+-----+-----+-----+-----+
  
  
  
                              IP TOS                IP TOS
                    Field     Policy      Field     Policy
                    Contents    Code      Contents    Code
                    0 0 0 0  ==>   0      0 0 0 1  ==>   2
                    0 0 1 0  ==>   4      0 0 1 1  ==>   6
                    0 1 0 0  ==>   8      0 1 0 1  ==>  10
                    0 1 1 0  ==>  12      0 1 1 1  ==>  14
                    1 0 0 0  ==>  16      1 0 0 1  ==>  18
                    1 0 1 0  ==>  20      1 0 1 1  ==>  22
                    1 1 0 0  ==>  24      1 1 0 1  ==>  26
                    1 1 1 0  ==>  28      1 1 1 1  ==>  30
  
                 Protocols defining 'policy' otherwise must either
                 define a set of values which are valid for
                 this object or must implement an integer-instanced
                 policy table for which this object's
                 value acts as an index."
         ::= { ipForwardEntry 3 }
  
  
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     ipForwardNextHop OBJECT-TYPE
         SYNTAX     IpAddress
         MAX-ACCESS read-only
         STATUS     obsolete
         DESCRIPTION
                "On remote routes, the address of the next system en
                 route; Otherwise, 0.0.0.0."
         ::= { ipForwardEntry 4 }
  
     ipForwardIfIndex OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     obsolete
         DESCRIPTION
                "The ifIndex value which identifies the local interface
                 through which the next hop of this route should be
                 reached."
         DEFVAL { 0 }
         ::= { ipForwardEntry 5 }
  
     ipForwardType OBJECT-TYPE
         SYNTAX     INTEGER {
                     other    (1), -- not specified by this MIB
                     invalid  (2), -- logically deleted
                     local    (3), -- local interface
                     remote   (4)  -- remote destination
                  }
         MAX-ACCESS read-create
         STATUS     obsolete
         DESCRIPTION
                "The type of route.  Note that local(3) refers to a
                 route for which the next hop is the final destination;
                 remote(4) refers to a route for which the next hop is
                 not the final destination.
  
                 Setting this object to the value invalid(2) has the
                 effect of invalidating the corresponding entry in the
                 ipForwardTable object.  That is, it effectively
                 disassociates the destination identified with said
                 entry from the route identified with said entry.  It is
                 an implementation-specific matter as to whether the
                 agent removes an invalidated entry from the table.
                 Accordingly, management stations must be prepared to
                 receive tabular information from agents that
                 corresponds to entries not currently in use.  Proper
                 interpretation of such entries requires examination of
                 the relevant ipForwardType object."
         DEFVAL { invalid }
         ::= { ipForwardEntry 6 }
  
     ipForwardProto OBJECT-TYPE
         SYNTAX     INTEGER {
                     other     (1),  -- not specified
                     local     (2),  -- local interface
  
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                     netmgmt   (3),  -- static route
                     icmp      (4),  -- result of ICMP Redirect
  
                             -- the following are all dynamic
                             -- routing protocols
                     egp       (5),  -- Exterior Gateway Protocol
                     ggp       (6),  -- Gateway-Gateway Protocol
                     hello     (7),  -- FuzzBall HelloSpeak
                     rip       (8),  -- Berkeley RIP or RIP-II
                     is-is     (9),  -- Dual IS-IS
                     es-is     (10), -- ISO 9542
                     ciscoIgrp (11), -- Cisco IGRP
                     bbnSpfIgp (12), -- BBN SPF IGP
                     ospf      (13), -- Open Shortest Path First
                     bgp       (14), -- Border Gateway Protocol
                     idpr      (15)  -- InterDomain Policy Routing
                  }
         MAX-ACCESS read-only
         STATUS     obsolete
         DESCRIPTION
                "The routing mechanism via which this route was learned.
                 Inclusion of values for gateway routing protocols is
                 not intended to imply that hosts should support those
                 protocols."
         ::= { ipForwardEntry 7 }
  
     ipForwardAge OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-only
         STATUS     obsolete
         DESCRIPTION
                "The number of seconds since this route was last updated
                 or otherwise determined to be correct.  Note that no
                 semantics of `too old' can be implied except through
                 knowledge of the routing protocol by which the route
                 was learned."
         DEFVAL  { 0 }
         ::= { ipForwardEntry 8 }
  
     ipForwardInfo OBJECT-TYPE
         SYNTAX     OBJECT IDENTIFIER
         MAX-ACCESS read-create
         STATUS     obsolete
         DESCRIPTION
                "A reference to MIB definitions specific to the
                 particular routing protocol which is responsible for
                 this route, as determined by the value specified in the
                 route's ipForwardProto value.  If this information is
                 not present, its value should be set to the OBJECT
                 IDENTIFIER { 0 0 }, which is a syntactically valid
                 object identifier, and any implementation conforming to
                 ASN.1 and the Basic Encoding Rules must be able to
                 generate and recognize this value."
         ::= { ipForwardEntry 9 }
  
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     ipForwardNextHopAS OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     obsolete
         DESCRIPTION
                "The Autonomous System Number of the Next Hop.  When
                 this is unknown or not relevant to the protocol
                 indicated by ipForwardProto, zero."
         DEFVAL { 0 }
         ::= { ipForwardEntry 10 }
  
     ipForwardMetric1 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     obsolete
         DESCRIPTION
                "The primary routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's ipForwardProto value.
                 If this metric is not used, its value should be set to
                 -1."
         DEFVAL { -1 }
         ::= { ipForwardEntry 11 }
  
     ipForwardMetric2 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     obsolete
         DESCRIPTION
                "An alternate routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's ipForwardProto value.
                 If this metric is not used, its value should be set to
                 -1."
         DEFVAL { -1 }
         ::= { ipForwardEntry 12 }
  
     ipForwardMetric3 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     obsolete
         DESCRIPTION
                "An alternate routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's ipForwardProto value.
                 If this metric is not used, its value should be set to
                 -1."
         DEFVAL { -1 }
         ::= { ipForwardEntry 13 }
  
     ipForwardMetric4 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
  
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         STATUS     obsolete
         DESCRIPTION
                "An alternate routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's ipForwardProto value.
                 If this metric is not used, its value should be set to
                 -1."
         DEFVAL { -1 }
         ::= { ipForwardEntry 14 }
  
     ipForwardMetric5 OBJECT-TYPE
         SYNTAX     Integer32
         MAX-ACCESS read-create
         STATUS     obsolete
         DESCRIPTION
                "An alternate routing metric for this route.  The
                 semantics of this metric are determined by the routing-
                 protocol specified in the route's ipForwardProto value.
                 If this metric is not used, its value should be set to
                 -1."
         DEFVAL { -1 }
         ::= { ipForwardEntry 15 }
  
     -- Obsoleted Definitions - Groups
     -- compliance statements
  
     ipForwardOldCompliance MODULE-COMPLIANCE
         STATUS     obsolete
         DESCRIPTION
                "The compliance statement for SNMP entities which
                 implement the ipForward MIB."
  
        MODULE  -- this module
        MANDATORY-GROUPS { ipForwardMultiPathGroup }
  
        ::= { ipForwardCompliances 2 }
  
     ipForwardMultiPathGroup OBJECT-GROUP
         OBJECTS { ipForwardNumber,
                   ipForwardDest, ipForwardMask, ipForwardPolicy,
                   ipForwardNextHop, ipForwardIfIndex, ipForwardType,
                   ipForwardProto, ipForwardAge, ipForwardInfo,
                   ipForwardNextHopAS,
                   ipForwardMetric1, ipForwardMetric2, ipForwardMetric3,
                   ipForwardMetric4, ipForwardMetric5
             }
         STATUS     obsolete
         DESCRIPTION
                "IP Multipath Route Table."
         ::= { ipForwardGroups 2 }
  
     END
  
  
  
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  10 Open Issues / To Do
  
     Instance values for this MIB can be as long as 44 bytes.
     Can/should we do anything about this?  May be alleviated by EOS
     plans?
  
     Why include the scalar inetCidrRouteNumber?  Is this used for
     something, or does it just require unnecessary MIB housekeeping?
  
     Better wording for ipForwardCompliance2?
  
   Security Considerations
  
     There are a number of management objects defined in this MIB that
     have 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.
  
     There are a number of managed objects in this MIB that may contain
     sensitive information. These are:
  
     The routing table can be used to discover information about the
     network topology within a domain.
  
     It is thus important to control even GET access to these objects
     and possibly to even encrypt the values of these object when
     sending them over the network via SNMP.  Not all versions of SNMP
     provide features for such a secure environment.
  
     SNMPv1 by itself is not a secure environment.  Even if the network
     itself is secure (for example by using IPSec), even then, there is
     no control as to whom on the secure network is allowed to access
     and GET/SET (read/change/create/delete) the objects in this MIB.
  
     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 [13] and the View-
     based Access Control Model RFC 2575 [16] is recommended.
  
     It is then a customer/user responsibility to ensure that the SNMP
     entity giving access to an instance of this MIB, 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.
  
  
  
  
  
  
  
  
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     IP Forwarding Table MIB                                   June 2002
  
  
  11 References
  
     [RFC2026]
          S. Bradner, "The Internet Standards Process -- Revision 3",
          RFC 2026, BCP9, October 1996
  
     [RFC2119]
          S. Bradner, "Key words for use in RFCs to Indicate Requirement
          Levels", RFC 2119, BCP14, March 1999.
  
     [1]
          F. Baker, "IP Forwarding Table MIB", RFC 2096, January 1997.
  
     [2]
          Harrington, D., Presuhn, R., and B. Wijnen, "An Architecture
          for Describing SNMP Management Frameworks", RFC 2571, April
          1999.
  
     [3]
          Rose, M., and K. McCloghrie, "Structure and Identification of
          Management Information for TCP/IP-based Internets", STD 16,
          RFC 1155, May 1990.
  
     [4]
          Rose, M., and K. McCloghrie, "Concise MIB Definitions", STD
          16, RFC 1212, March 1991.
  
     [5]
          Rose, M., "A Convention for Defining Traps for use with the
          SNMP", RFC 1215, March 1991.
  
     [6]
          McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
          Rose, M., and S. Waldbusser, "Structure of Management
          Information Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.
  
     [7]
          McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
          Rose, M., and S. Waldbusser, "Textual Conventions for SMIv2",
          STD 58, RFC 2579, April 1999.
  
     [8]
          McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
          Rose, M., and S. Waldbusser, "Conformance Statements for
          SMIv2", STD 58, RFC 2580, April 1999.
  
     [9]
          Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple
          Network Management Protocol", STD 15, RFC 1157, May 1990.
  
     [10]
          Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
  
  
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          "Introduction to Community-based SNMPv2", RFC 1901, January
          1996.
  
     [11]
          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.
  
     [12]
          Case, J., Harrington D., Presuhn R., and B. Wijnen, "Message
          Processing and Dispatching for the Simple Network Management
          Protocol (SNMP)", RFC 2572, April 1999.
  
     [13]
          Blumenthal, U., and B. Wijnen, "User-based Security Model
          (USM) for      version 3 of the Simple Network Management
          Protocol (SNMPv3)", RFC 2574, April 1999.
  
     [14]
          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.
  
     [15]
          Levi, D., Meyer, P., and B. Stewart, "SNMPv3 Applications",
          RFC 2573, April 1999.
  
     [16]
          Wijnen, B., Presuhn, R., and K. McCloghrie, "View-based Access
          Control Model (VACM) for the Simple Network Management
          Protocol (SNMP)", RFC 2575, April 1999.
  
     [17]
          Case, J., Mundy, R., Partain, D., and B. Stewart,
          "Introduction to Version 3 of the Internet-standard Network
          Management Framework",RFC 2570, April 1999.
  
     [18]
          Nichols, K., Blake, S., Baker, F., Black, D., "Definition of
          the Differentiated Services Field (DS Field) in the IPv4 and
          IPv6 Headers", RFC 2474, December 1998.
  
     [19]
          Daniele, M., Haberman, B., Routhier, S., Schoenwaelder, J.,
          "Textual Conventions for Internet Network Addresses", RFC
          3291, May2002
  
  
  
  
  
  
  
  
  
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  12 Authors and Acknowledgements
  
     This document was based on RFC 2096 [1].
  
     The following people provided text for this version of the
     document, or were authors of previous versions:
  
     Fred Baker, Cisco
     Bill Fenner, AT&T Research
     Brian Haberman
     Juergen Schoenwalder, TU Braunschweig
     Dave Thaler, Microsoft
  
  13 Editor's Contact Information
  
     Comments or questions regarding this document should be sent to:
  
     Margaret Wasserman
     Wind River
     10 Tara Blvd., Suite 330             Phone:  (603) 897-2067
     Nashua, NH  03062  USA               Email:  mrw@windriver.com
  
  14 Full Copyright Statement
  
     Copyright (C) The Internet Society (2002). All Rights Reserved.
  
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     it or assist in its implementation may be prepared, copied,
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     However, this document itself may not be modified in any way, such
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     The limited permissions granted above are perpetual and will not be
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     This document and the information contained herein is provided on
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