SNMP Introduction
©2008 Allied Telesis Inc. All rights reserved.
54.2
AlliedWare Plus
TM
Operating System Software Reference C613-50003-00 REV E
Software Version 5.2.1
Introduction
The Simple Network Management Protocol (SNMP) is the network management protocol of
choice for the Internet and IP-based internetworks.
This chapter describes the main features of SNMP Version 1 (SNMPv1), SNMP Version 2c
(SNMPv2c) and Version 3 (SNMPv3). It also describes support for SNMP on the switch, and
how to configure the switch’s SNMP agent.
Unless a particular version of SNMP is named, “SNMP” in this chapter refers to versions
SNMPv1, SNMPv2c and SNMPv3.
See also
Chapter 55, SNMP Commands
and
Chapter 56, SNMP MIBs
.
Network Management Framework
A network management system has the following components:
■
One or more
managed devices
, each containing an agent that provides the management
functions. A managed device may be any computing device with a network capability, for
example, a host system, workstation, terminal server, printer, router, switch, bridge, hub or
repeater.
■
One or more
Network Management Stations (NMS)
. An NMS is a host system running a
network management protocol and network management applications, enabling the user
to manage the network.
■
A
network management protocol
used by the NMS and agents to exchange information.
Figure 54-1: Components of a network management system
The Internet-standard Network Management Framework is the framework used for network
management in the Internet. The framework was originally defined by the following documents:
■
RFC 1155,
Structure and identification of management information for TCP/IPbased internets
(referred to as the SMI), details the mechanisms used to describe and name the objects to
be managed.
■
RFC 1213,
Management Information Base for network management of TCP/ IP-based
internets: MIB-II
(referred to as MIB-II), defines the core set of managed objects for the
Internet suite of protocols. The set of managed objects can be extended by adding other
MIBs specific to particular protocols, interfaces or network devices.
■
RFC 1157,
A Simple Network Management Protocol (SNMP)
, is the protocol used for
communication between management stations and managed devices.
Network
Management
Protocol
Network Management
Station
Agent
Object
Object
Object
Object
Managed Device
SNMP1
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