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5.1.3
SNMP
In brief, SNMP, the Simple Network Management Protocol, is a protocol designed to give a user the
capability to remotely manage a computer network by polling and setting terminal values and monitoring
network events.
In typical SNMP uses, one or more administrative computers, called managers, have the task of
monitoring or managing a group of hosts or devices on a computer network. Each managed system
executes, at all times, a software component called an agent which reports information via SNMP to the
manager.
SNMP agents expose management data on the managed systems as variables. The protocol also
permits active management tasks, such as modifying and applying a new configuration through remote
modification of these variables. The variables accessible via SNMP are organized in hierarchies. These
hierarchies, and other metadata (such as type and description of the variable), are described by
Management Information Bases (MIBs).
The device supports several public MIBs and one private MIB for the SNMP agent. The supported MIBs
are as follow: MIB-II (RFC 1213, Include IPv6), IF-MIB, IP-MIB, TCP-MIB, UDP-MIB, SMIv1 and SMIv2,
SNMPv2-TM and SNMPv2-MIB, and AMIB (a Proprietary MIB)
SNMP Management Scenario
Scenario Application Timing
There are two application scenarios of SNMP Network Management Systems (NMS).
Local NMS is in the Intranet and manage all devices that support SNMP protocol in the Intranet. Another
one is the Remote NMS to manage some devices whose WAN interfaces are connected together by