H3C S7500 Series Ethernet Switches Command Manual

Command Manual – SNMP and RMON
H3C S7500 Series Ethernet Switches Chapter 2
RMON Configuration Commands
2-14
Use the undo rmon prialarm command to remove a specified extended alarm entry.
The maximum number of instances in a table varies with the hardware resources.
 Note:
z Before adding an extended alarm entry, you need to use the rmon event command
to define the events to be referenced by the entry.
z Make sure the node to be monitored exists before executing the rmon event
command.
z You can define up to 50 extended alarm entries.
With an extended alarm entry defined in an extended alarm group, the network devices
perform the following operations accordingly:
z Sampling the alarm variables referenced in the defined extended alarm
expressions (prialarm-formula) once in each period specified by the
sampling-timer argument.
z Performing operations on sampled values according to the defined extended
alarm expressions (prialarm-formula).
z Comparing the operation result with the set thresholds and performing
corresponding operations, as described in
Table 2-8.
Table 2-8 Operation result and corresponding operation
Comparison Operation
The operation result is larger than or
equal to the set upper threshold
(threshold-value1)
Triggering the event identified by the
event-entry1 argument
The operation result is smaller than or
equal to the set lower threshold
(threshold-value2)
Triggering the event identified by the
event-entry2 argument
Examples
# Add the extended alarm entry numbered 2 as follows:
z Perform operations on the corresponding alarm variables using the expression
((1.3.6.1.2.1.16.1.1.1.4.1)*100).
z Sampling interval: 10 seconds
z Upper threshold: 50
z Lower threshold: 5
z Event 1 is triggered when the change ratio is larger than the upper threshold.
z Event 2 is triggered when the change ratio is less than the lower threshold.