IP Forwarding Table MIB
RFC 2096
Document | Type |
RFC - Proposed Standard
(January 1997; No errata)
Obsoleted by RFC 4292
Obsoletes RFC 1354
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Author | Fred Baker | ||
Last updated | 2013-03-02 | ||
Stream | Internet Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 2096 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | (None) | ||
Send notices to | (None) |
Network Working Group F. Baker Request for Comments: 2096 Cisco Systems Obsoletes: 1354 January 1997 Category: Standards Track IP Forwarding Table MIB Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Table of Contents 1. Introduction .......................................... 1 2. The SNMP Network Management Framework ................. 2 2.1 Object Definitions ................................... 2 3. Overview .............................................. 2 4. Definitions ........................................... 3 5. Acknowledgements ...................................... 20 6. References ............................................ 20 7. Security Considerations ............................... 21 8. Author's Address ...................................... 21 1. Introduction This memo defines an update to RFC 1354, "IP Forwarding Table MIB", for Classless Inter-Domain Routing (CIDR). That document was developed by the Router Requirements Working Group as an update to RFC 1213's ipRouteTable, with the display of multiple routes as a primary objective. The significant difference between this MIB and RFC 1354 is the recognition (explicitly discussed but by consensus left to future work) that CIDR routes may have the same network number but different network masks. Note that this MIB obsoletes a number of objects from RFC 1354. The reader should pay careful attention to the STATUS field. Baker Standards Track [Page 1] RFC 2096 IP Forwarding Table MIB January 1997 2. The SNMP Network Management Framework The SNMP Network Management Framework presently consists of three major components. They are: o the SMI, described in RFC 1902 [1], - the mechanisms used for describing and naming objects for the purpose of management. o the MIB-II, STD 17, RFC 1213 [2], - the core set of managed objects for the Internet suite of protocols. o the protocol, RFC 1157 [6] and/or RFC 1905 [4], - the protocol for accessing managed information. Textual conventions are defined in RFC 1903 [3], and conformance statements are defined in RFC 1904 [5]. The Framework permits new objects to be defined for the purpose of experimentation and evaluation. 2.1. Object Definitions Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. Objects in the MIB are defined using the subset of Abstract Syntax Notation One (ASN.1) defined in the SMI. In particular, each object object type is named by an OBJECT IDENTIFIER, an administratively assigned name. The object type together with an object instance serves to uniquely identify a specific instantiation of the object. For human convenience, we often use a textual string, termed the descriptor, to refer to the object type. 3. Overview The MIB consists of two tables and two global objects. (1) The object ipForwardNumber indicates the number of current routes. This is primarily to avoid having to read the table in order to determine this number. (2) The ipForwardTable updates the RFC 1213 ipRouteTable to display multipath IP Routes. This is in turn obsoleted by the ipCidrRouteTable. (3) The ipCidrRouteTable updates the RFC 1213 ipRouteTable to display multipath IP Routes having the same network number but differing network masks. Baker Standards Track [Page 2] RFC 2096 IP Forwarding Table MIB January 1997 4. Definitions IP-FORWARD-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, IpAddress, Integer32, Gauge32 FROM SNMPv2-SMI RowStatus FROM SNMPv2-TC ip FROM RFC1213-MIB MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF; ipForward MODULE-IDENTITY LAST-UPDATED "9609190000Z" -- Thu Sep 26 16:34:47 PDT 1996 ORGANIZATION "IETF OSPF Working Group" CONTACT-INFO " Fred Baker Postal: Cisco Systems 519 Lado Drive Santa Barbara, California 93111 Phone: +1 805 681 0115 Email: fred@cisco.com " DESCRIPTION "The MIB module for the display of CIDR multipath IP Routes." REVISION "9609190000Z" DESCRIPTION "Revisions made by the OSPF WG."Show full document text