Cisco Catalyst 2960 Software Configuration Manual page 666

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Understanding RMON

RMON alarms and events

configured. SNMP configured.

The switch supports these RMON groups (defined in RFC 1757):

Statistics (RMON group 1)—Collects Ethernet statistics (including Fast Ethernet and Gigabit

Ethernet statistics, depending on the switch type and supported interfaces) on an interface.

History (RMON group 2)—Collects a history group of statistics on Ethernet ports (including Fast

Ethernet and Gigabit Ethernet statistics, depending on the switch type and supported interfaces) for

a specified polling interval.

Alarm (RMON group 3)—Monitors a specific management information base (MIB) object for a

specified interval, triggers an alarm at a specified value (rising threshold), and resets the alarm at

another value (falling threshold). Alarms can be used with events; the alarm triggers an event, which

can generate a log entry or an SNMP trap.

Event (RMON group 9)—Specifies the action to take when an event is triggered by an alarm. The

action can be to generate a log entry or an SNMP trap.

Because switches supported by this software release use hardware counters for RMON data processing,

the monitoring is more efficient, and little processing power is required.

64-bit counters are not supported for RMON alarms.

Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE

Remote Monitoring Example

Network management station with

generic RMON console application

RMON history

and statistic

collection enabled.

Workstations

Configuring RMON

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