Mib Object Hierarchy; Describing And Naming Objects - Nortel 2000 User Manual

Chapter 2 Simple Network Management Protocol (SNMP)
Remote Annex Administrator's Guide for UNIX
Book B-50

MIB Object Hierarchy

MIBs define the hierarchy of managed objects. MIB objects represent
data that the Annex 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 Annex
private enterprise MIB.
Book B