RFC 1850 (rfc1850) - Page 3 of 80

OSPF Version 2 Management Information Base

Alternative Format: Original Text Document
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RFC 1850                        OSPF MIB                   November 1995


1.1.  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.

2.  Overview

2.1.  Changes from RFC 1253

   The changes from RFC 1253 are the following:

   (1)  The textual convention PositiveInteger was changed from
        1..'FFFFFFFF'h to 1..'7FFFFFFF'h at the request of
        Marshall Rose.

   (2)  The textual convention TOSType was changed to reflect the
        TOS values defined in the Router Requirements Draft, and
        in accordance with the IP Forwarding Table MIB's values.

   (3)  The names of some objects were changed, conforming to the
        convention that an acronym (for example, LSA) is a single
        word ("Lsa") in most SNMP names.

   (4)  textual changes were made to make the MIB readable by
        Dave Perkins' SMIC MIB Compiler in addition to Mosy.
        This involved changing the case of some characters in
        certain names and removing the DEFVAL clauses for
        Counters.

   (5)  The variables ospfAreaStatus and ospfIfStatus were added,
        having been overlooked in the original MIB.

   (6)  The range of the variable ospfLsdbType was extended to
        include multicastLink (Group-membership LSA) and
        nssaExternalLink (NSSA LSA).

   (7)  The variable ospfIfMetricMetric was renamed
        ospfIfMetricValue, and the following text was removed
        from its description:

        "The value FFFF is distinguished to mean 'no route via



Baker & Coltun              Standards Track
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