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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 16 Configuring RMON
Configuring RMON
To disable an alarm, use the no rmon alarm number global configuration command on each alarm you
configured. You cannot disable at once all the alarms that you configured. To disable an event, use the
no rmon event number global configuration command. To learn more about alarms and events and how
they interact with each other, refer to RFC 1757.
You can set an alarm on any MIB object. The following example configures RMON alarm number 10
by using the rmon alarm command. The alarm monitors the MIB variable ifEntry.20.1 once every 20
seconds until the alarm is disabled and checks the change in the variable’s rise or fall. If the ifEntry.20.1
value shows a MIB counter increase of 15 or more, such as from 100000 to 100015, the alarm is
triggered. The alarm in turn triggers event number 1, which is configured with the rmon event
command. Possible events can include a log entry or an SNMP trap. If the ifEntry.20.1 value changes
by 0, the alarm is reset and can be triggered again.
Switch(config)# rmon alarm 10 ifEntry.20.1 20 delta rising-threshold 15 1
falling-threshold 0 owner jjohnson
The following example creates RMON event number 1 by using the rmon event command. The event
is defined as High ifOutErrors and generates a log entry when the event is triggered by the alarm. The
user jjones owns the row that is created in the event table by this command. This example also generates
an SNMP trap when the event is triggered.
Switch(config)# rmon event 1 log trap eventtrap description "High ifOutErrors" owner
jjones
Step 3
rmon event number [log] [trap community]
[description string] [owner string]
Add an event in the RMON event table that is
associated with an RMON event number.
•
For number, assign an event number. The range
is 1 to 65535.
•
(Optional) Use the log keyword to generate an
RMON log entry when the event is triggered.
•
(Optional) For community, enter the SNMP
community string used for this trap.
•
(Optional) For description string, specify a
description of the event.
•
(Optional) For owner string, specify the owner
of this event.
Step 4
end
Return to privileged EXEC mode.
Step 5
show running-config
Verify your entries.
Step 6
copy running-config startup-config
(Optional) Save your entries in the configuration
file.
Command
Purpose
