SNMP Traps

The get and set commands that SNMP uses are useful for querying hosts within a network. However, the commands do not provide a means by which events can trigger a notification. For instance, if a link fails, the health of the link is unknown until an SNMP manager next queries that agent.

SNMP traps are unsolicited notifications that are triggered by events on the host. When you configure a trap, you specify the types of events that can trigger trap messages, and you configure a set of targets to receive the generated messages.

SNMP traps enable an agent to notify a network management system (NMS) of significant events. You can configure an event policy action that uses system log messages to initiate traps for events. The traps enable an SNMP trap-based application to be notified when an important event occurs. You can convert any system log message that has no corresponding traps into a trap. This feature helps you to use NMS traps rather than system log messages to monitor the network.

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