Information About Implementing Snmp; Snmp Functional Overview; Snmp Manager; Snmp Agent - Cisco NCS 5000 Series Manual

Information about Implementing SNMP

Information about Implementing SNMP
To implement SNMP, you need to understand the concepts described in this section.

SNMP Functional Overview

The SNMP framework consists of three parts:

• SNMP manager

• SNMP agent

• Management Information Base (MIB)
SNMP Manager
The SNMP manager is the system used to control and monitor the activities of network hosts using SNMP.
The most common managing system is called a network management system (NMS). The term NMS can be
applied to either a dedicated device used for network management, or the applications used on such a device.
A variety of network management applications are available for use with SNMP. These features range from
simple command-line applications to feature-rich graphical user interfaces (such as the CiscoWorks 2000 line
of products).
SNMP Agent
The SNMP agent is the software component within the managed device that maintains the data for the device
and reports these data, as needed, to managing systems. The agent and MIB reside on the router. To enable
the SNMP agent, you must define the relationship between the manager and the agent.

MIB

The Management Information Base (MIB) is a virtual information storage area for network management
information, which consists of collections of managed objects. Within the MIB there are collections of related
objects, defined in MIB modules. MIB modules are written in the SNMP MIB module language, as defined
in STD 58, RFC 2578, RFC 2579, and RFC 2580. Note that individual MIB modules are also referred to as
MIBs; for example, the Interfaces Group MIB (IF-MIB) is a MIB module within the MIB on your system.
The SNMP agent contains MIB variables whose values the SNMP manager can request or change through
Get or Set operations. A manager can get a value from an agent or store a value into that agent. The agent
gathers data from the MIB, the repository for information about device parameters and network data. The
agent can also respond to manager requests to get or set data.
Figure 1
send the agent requests to get and set MIB values. The agent can respond to these requests. Independent of
System Management Configuration Guide for Cisco NCS 5000 Series Routers, IOS XR Release 6.2.x
20
illustrates the communications relationship between the SNMP manager and agent. A manager can
Implementing SNMP