RMON 121EventsThe Events group creates entries in an event log and/or sends SNMP trapsto the management workstation. An event is triggered by an RMONalarm. 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, orto both log and send a trap. The RMON traps are defined in RFC 1757 forrising and falling thresholds.Effective use of the Events group saves you time. Rather than having towatch real-time graphs for important occurrences, you can depend onthe Event group for notification. Through the SNMP traps, events cantrigger other actions, providing a mechanism for an automated responseto certain occurrences.Benefits of RMON Using the RMON features of your switch has the following three mainadvantages:n It improves network monitoring efficiency.n It allows you to manage the network in a more proactive manner.n It reduces the load on the network and the management workstation.Improving EfficiencyUsing RMON probes allows you to remain at one workstation and collectinformation from widely dispersed LAN segments or VLANs. This meansthat the time taken to reach a problem site, set up equipment, and begincollecting information is largely eliminated.Allowing Proactive ManagementIf they are configured correctly, RMON probes deliver information beforeproblems occur. This means that you can take action before problemsimpact users. In addition, probes record the behavior of your network, sothat you can analyze the causes of problems.Reducing the Traffic LoadTraditional network management involves a management workstationpolling network devices at regular intervals to gather statistics andidentify problems or trends. As network sizes grow and traffic levelsincrease, this approach places a strain on the management workstationand also generates large amounts of traffic.
