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SNMP CONFIGURATION
When configuring SNMP, go to these sections for information you are interested
in:
■ “SNMP Overview” on page 931
■ “SNMP Configuration” on page 933
■ “Configuring SNMP Logging” on page 935
■ “Trap Configuration” on page 936
■ “Displaying and Maintaining SNMP” on page 937
■ “SNMP Configuration Example” on page 938
■ “SNMP Logging Configuration Example” on page 939
SNMP Overview Simple Network Management Protocol (SNMP) offers a framework to monitor
network devices through TCP/IP protocol suite. It provides a set of basic operations
in monitoring and maintaining the Internet and has the following characteristics:
■ Automatic network management: SNMP enables network administrators to
search and modify information, find and diagnose network problems, plan for
network growth, and generate reports on network nodes.
■ SNMP shields the physical differences between various devices and thus realizes
automatic management of products from different manufacturers. Offering
only the basic set of functions, SNMP makes the management tasks
independent of both the physical features of the managed devices and the
underlying networking technology. Thus, SNMP achieves effective
management of devices from different manufacturers, especially in small,
high-speed and low cost network environments.
SNMP Mechanism An SNMP enabled network comprises network management station (NMS) and
Agent.
■ NMS is a station that runs the SNMP client software. It offers a user friendly
interface, making it easier for network administrators to perform most network
management tasks. Currently, the most commonly used NMSs include
Quidview, Sun NetManager, and IBM NetView.
■ Agent is a program on the device. It receives and handles requests sent from
the NMS. Only under certain circumstances, such as interface state change, will
the Agent inform the NMS.
■ NMS manages an SNMP enabled network, whereas Agent is the managed
network device. They exchange management information through the SNMP
protocol.
SNMP provides the following four basic operations:
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