RFC 1850 (rfc1850) - Page 3 of 80
OSPF Version 2 Management Information Base
Alternative Format: Original Text Document
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
