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RMON
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Events
The Events group creates entries in an event log and/or sends SNMP traps
to the management workstation. An event is triggered by an RMON
alarm. The action taken can be configured to ignore it, to log the event,
to send an SNMP trap to the receivers listed in the trap receiver table, or
to both log and send a trap. The RMON traps are defined in RFC 1757 for
rising and falling thresholds.
Effective use of the Events group saves you time. Rather than having to
watch real-time graphs for important occurrences, you can depend on
the Event group for notification. Through the SNMP traps, events can
trigger other actions, providing a mechanism for an automated response
to certain occurrences.
Benefits of RMON
Using the RMON features of your switch has the following three main
advantages:
■
It improves network monitoring efficiency.
■
It allows you to manage the network in a more proactive manner.
■
It reduces the load on the network and the management workstation.
Improving Efficiency
Using RMON probes allows you to remain at one workstation and collect
information from widely dispersed LAN segments or VLANs. This means
that the time taken to reach a problem site, set up equipment, and begin
collecting information is largely eliminated.
Allowing Proactive Management
If they are configured correctly, RMON probes deliver information before
problems occur. This means that you can take action before problems
impact users. In addition, probes record the behavior of your network, so
that you can analyze the causes of problems.
Reducing the Traffic Load
Traditional network management involves a management workstation
polling network devices at regular intervals to gather statistics and
identify problems or trends. As network sizes grow and traffic levels
increase, this approach places a strain on the management workstation
and also generates large amounts of traffic.