Mib Object Hierarchy; Describing And Naming Objects; Restrictions On Standard Mibs - Nortel 5399 User Manual

Book A
Model 5399 Remote Access Concentrator Network Administrator's Guide for UNIX

MIB Object Hierarchy

MIBs define the hierarchy of managed objects. MIB objects represent
data that the 5399 RAC can retrieve or configuration information that it
can modify.

Describing and Naming Objects

RFC 1155 (Structure and Identification of Management Information for
TCP/IP-based Internets) describes the layout and encoding of exchanged
data objects. The SMI (Structure of Management Information) uses the
ISO standard ASN.1 (Abstract Syntax Notation One) to define a method
for describing a hierarchical name space for managed information.
Each object has:
• A name (also referred to as an Object Identifier (OID)).
• A syntax and an encoding. In addition to the basic integer and
octet string data types, several special types are defined (e.g, IP
Address, Network Address, Counter, Gauge, TimeTicks). RFC
1212 (Concise MIB Definitions) is an easier-to-read form used
in most standard MIBs today. It is used to define the private
enterprise MIB.

Restrictions on Standard MIBs

The SNMP Agent does not use all objects in the supported standard MIBs.
This section lists the supported standard MIBs and outlines the
differences between the Annex parameters and specific standard MIB
objects. 5399 RAC Standard MIB Support on page A-64 lists the
supported standard MIBs.
Chapter 2 Simple Network Management Protocol (SNMP)
A-65