Filter
Top Products
Configuring RMON fault threshold parameters 115
Item Range Description
Current
Level
Integer The value of the statistic during the last sampling period.
Note: If the sample type is Delta, the value is the
difference between the samples at the beginning and end
of the period. If the sample type is Absolute, the value is
the sampled value at the end of the period.
Rising Level Integer Type the event entry used when a rising threshold is
crossed.
Note: 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. After a rising event is generated, another such
event is not generated until the sampled value falls below
this threshold and reaches the Falling Threshold.
Rising
Action
(1) None
(2) Log
(3) SNMP-Trap
(4) Log-and-Trap
Choose the type of notification for the event. Selecting
Log generates an entry in the RMON Event Log table for
each event. Selecting SNMP Trap sends an SNMP trap
to one or more management stations.
Interval Type the time period (in seconds) to sample data and
compare the data to the rising and falling thresholds.
Sample/Alar
m Sample
(1) Absolute
(2) Delta
Choose the sampling method:
Absolute: Absolute alarms are defined on the current
value of the alarm variable. An example of an alarm
defined with absolute value is card operating status.
Because this value is not cumulative, but instead
represents states, such as card up (value 1) and card
down (value 2), you set it for absolute value. Therefore,
an alarm can be created with a rising value of 2 and a
falling value of 1 to alert a user to whether the card is
up or down.
Delta: Most alarm variables related to Ethernet traffic are
set to delta value. Delta alarms are defined based on
the difference in the value of the alarm variable between
the start of the polling period and the end of the polling
period. Delta alarms are sampled twice per polling
period. For each sample, the last two values are added
together and compared to the threshold values. This
process increases precision and allows for the detection
of threshold crossings that span the sampling boundary.
Therefore, if you keep track of the current values of a
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
.