> # Information About RMON

> RMON is disabled by default, and no events or alarms are configured in the switch.

> All switches in the Cisco MDS 9000 Family support the following RMON functions (defined in RFC 2819):

> - Alarm—Each alarm monitors a specific management information base (MIB) object for a specified interval. When the MIB object value exceeds a specified value (rising threshold), the alarm condition is set and only one event is triggered regardless of how long the condition exists. When the MIB object value falls below a certain value (falling threshold), the alarm condition is cleared. This allows the alarm to trigger again when the rising threshold is crossed again.
> - Event—Determines the action to take when an event is triggered by an alarm. The action can be to generate a log entry, an SNMP trap, or both.

> For agent and management information, see the Cisco MDS 9000 Family MIB Quick Reference.

> For information on an SNMP-compatible network management station, see the "Configuring SNMP" topic .

> This section includes the following topics:

> - RMON Configuration Information
> - RMON Configuration Using Threshold Manager
> - RMON Alarm Configuration Information

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