Cisco Systems Dial NMS User Manual

Overview of Basic SNMP Building Blocks

What are SNMP MIBs?

Basic Dial NMS Implementation Guide

Figure 2

SNMP Event Interactions Between the NMS and the Agent

What are SNMP MIBs?

A Management Information Base (MIB):

Presents a collection of information that is organized hierarchically.

Is accessed by using a network-management protocol, such as SNMP.

References managed objects and object identifiers.

Managed object—A characteristic of a managed device. Managed objects reference one or more object
instances (variables). Two types of managed objects exist:

Scalar objects—Define a single object instance.

Tabular objects—Define multiple-related object instances that are grouped together in MIB tables.

Object identifier (or object ID)—Identifies a managed object in the MIB hierarchy. The MIB hierarchy
is depicted as a tree with a nameless root. The levels of the tree are assigned by different organizations
and vendors.

Agent

(Cisco IOS device)

NMS

NMS
initiated

Trap (agent initiated)

Get request

Get next

Response

26095