Configuring rmon alarms – Brocade Communications Systems Brocate Ethernet Access Switch 6910 User Manual
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Brocade 6910 Ethernet Access Switch Configuration Guide
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Remote Monitoring
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Configuring RMON Alarms
Use the Administration > RMON (Configure Global - Add - Alarm) page to define specific criteria that
will generate response events. Alarms can be set to test data over any specified time interval, and
can monitor absolute or changing values (such as a statistical counter reaching a specific value, or
a statistic changing by a certain amount over the set interval). Alarms can be set to respond to
rising or falling thresholds. (However, note that after an alarm is triggered it will not be triggered
again until the statistical value crosses the opposite bounding threshold and then back across the
trigger threshold.
CLI References
•
Command Usage
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If an alarm is already defined for an index, the entry must be deleted before any changes can
be made.
Parameters
These parameters are displayed:
•
Index – Index to this entry. (Range: 1-65535)
•
Variable – The object identifier of the MIB variable to be sampled. Only variables of the type
etherStatsEntry.n.n may be sampled.
Note that etherStatsEntry.n uniquely defines the MIB variable, and etherStatsEntry.n.n defines
the MIB variable, plus the etherStatsIndex. For example, 1.3.6.1.2.1.16.1.1.1.6.1 denotes
etherStatsBroadcastPkts, plus the etherStatsIndex of 1.
•
Interval – The polling interval. (Range: 1-31622400 seconds)
•
Sample Type – Tests for absolute or relative changes in the specified variable.
•
Absolute – The variable is compared directly to the thresholds at the end of the sampling
period.
•
Delta – The last sample is subtracted from the current value and the difference is then
compared to the thresholds.
•
Rising Threshold – If the current value is greater than or equal to the rising threshold, and the
last sample value was less than this threshold, then an alarm will be generated. After a rising
event has been generated, another such event will not be generated until the sampled value
has fallen below the rising threshold, reaches the falling threshold, and again moves back up
to the rising threshold. (Range: 0-2147483647)
•
Rising Event Index – The index of the event to use if an alarm is triggered by monitored
variables reaching or crossing above the rising threshold. If there is no corresponding entry in
the event control table, then no event will be generated. (Range: 0-65535)
•
Falling Threshold – If the current value is less than or equal to the falling threshold, and the
last sample value was greater than this threshold, then an alarm will be generated. After a
falling event has been generated, another such event will not be generated until the sampled
value has risen above the falling threshold, reaches the rising threshold, and again moves
back down to the failing threshold. (Range: 0-2147483647)
•
Falling Event Index – The index of the event to use if an alarm is triggered by monitored
variables reaching or crossing below the falling threshold. If there is no corresponding entry in
the event control table, then no event will be generated. (Range: 0-65535)