Reference Guide

Statistics/RMON 465
Alarms
RMON alarms provide a mechanism for setting thresholds and sampling
intervals to generate exception events on a counter or any other SNMP object
counter maintained by the agent.
Both the rising and falling thresholds must be configured in the alarm. After a
rising threshold is crossed, another rising event is not generated until the
companion falling threshold is crossed. After a falling alarm is issued, the next
alarm is issued when a rising threshold is crossed. One or more alarms are
bound to an event. The event indicates the action to be taken when the alarm
occurs.
To add an RMON alarm:
1
Click Statistics/RMON > RMON > Alarms in the tree view to display
the
Alarms: Summary page.
The currently-defined alarms are displayed.
2 To add a new alarm, click Add and enter the fields:
–
Alarm Entry — Displays a new alarm entry.
–
Port — Select the port or LAG for which RMON statistics are
displayed.
–
Counter Name — Select the selected MIB variable.
–
Sample Type — Select the sampling method for the selected variable
and comparing the value against the thresholds. The possible options
are:
•
Delta — Subtracts the last sampled value from the current value.
The difference in the values is compared to the threshold.
•
Absolute — Compares the values directly with the thresholds at
the end of the sampling interval.
–
Rising Threshold (0–2147483647 ) — Enter the rising counter value
that triggers the rising event alarm.
–
Rising Event — Select one of the previously-defined events.
–
Falling Threshold (0–2147483647 ) — Enter the falling counter value
that triggers the falling event alarm.
–
Falling Event — Select one of the previously-defined events.