Edge-Core ECS3510-28T Management Manual page 472

| Basic Administration Protocols
C 14
HAPTER
Remote Monitoring
C
ONFIGURING
RMON A
LARMS
periodically communicates with the switch using the SNMP protocol.
However, if the switch encounters a critical event, it can automatically send
a trap message to the management agent which can then respond to the
event if so configured.
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 R
EFERENCES
"Remote Monitoring Commands" on page 793
◆
C U
OMMAND SAGE
If an alarm is already defined for an index, the entry must be deleted
◆
before any changes can be made.
P
ARAMETERS
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)
– 472 –