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RMON Alarms 105
Field Description
Interval The interval in seconds over which data is sampled and compared with
the rising and falling thresholds. When setting this variable, in the case
of deltaValue sampling, set the interval short enough so that the sampled
variable is unlikely to increase or decrease by more than 2
^31
- 1 during a
single sampling interval.
Variable The object identifier of the particular variable to be sampled. Only variables
that resolve to an ASN.1 primitive type of INTEGER (INTEGER, Counter,
Gauge, or TimeTicks) can be sampled.
Sample Type The method of sampling the selected variable and calculating the value to be
compared against the thresholds. If the value of this object is absoluteValue(1),
the value of the selected variable is compared directly with the thresholds at
the end of the sampling interval. If the value of this object is deltaValue(2), the
value of the selected variable at the last sample is subtracted from the current
value, and the difference compared with the thresholds.
Value The value of the statistic during the last sampling period. For example, if the
sample type is deltaValue, this value is the difference between the samples at
the beginning and end of the period. If the sample type is absoluteValue, this
value is the sampled value at the end of the period. This value is compared
with the rising and falling thresholds. The value during the current sampling
period is not made available until the period is completed and remains
available until the next period completes.
StartupAlarm The alarm that can be sent when this entry is first set to valid. If the first sample
after this entry becomes valid is greater than or equal to the risingThreshold
and alarmStartupAlarm is equal to risingAlarm(1) or risingOrFallingAlarm(3),
then a single rising alarm is generated. If the first sample after this
entry becomes valid is less than or equal to the fallingThreshold and
alarmStartupAlarm is equal to fallingAlarm(2) or risingOrFallingAlarm(3), then
a single falling alarm is generated.
RisingThreshold A threshold for the sampled statistic. When the current sampled value is
greater than or equal to this threshold, and the value at the last sampling
interval was less than this threshold, a single event is generated. A single
event is also generated after this entry becomes valid if the first sample is
greater than or equal to this threshold and the associated alarmStartupAlarm
is equal to risingAlarm(1) or risingOrFallingAlarm(3). After a rising event is
generated, another such event is not generated until the sampled value falls
below this threshold and reaches the alarmFallingThreshold.
RisingEventInde
x
The index of the eventEntry that is used when a rising threshold is crossed. The
eventEntry identified by a particular value of this index is the same as identified
by the same value of the eventIndex object. If there is no corresponding entry
in the eventTable, then no association exists. In particular, if this value is zero,
no associated event is generated, because zero is not a valid event index.
Nortel Ethernet Switch 460/470
Configuration — System Monitoring
NN47210-503 01.01 Standard
3.7 22 February 2007
Copyright © 2005-2007, Nortel Networks Nortel Networks Confidential
.