3Com Switch 8807, Configuration Manual

Page: 749 / 883

Configuring RMON 749
After you defined the alarm entry, the system then processes the entry in the
following way:
1 Sampling the defined alarm-variable according to the time interval sampling-time
that you have set
2 Comparing the sampled value with the configured threshold and handling them in
the way described in the following table
Adding/Deleting an
Entry to/from the
Extended RMON Alarm
Table
You can use the command to add/delete an entry to/from the extended RMON
alarm table. The extended alarm entry performs mathematical operation to the
sampled value of the alarm variable, and then the result will be compared with the
configured threshold to implementing the alarm function.
n
Before adding extended alarm entry, you need to define the referenced event in
the extended alarm entry by using the
rmon event command.
You can define up to 50 prialarm entries.
Perform the following configuration in system view.
After you define the extended alarm entry, the system processes the entry in the
following way:
1 Sampling the defined prialarm-formula according to the time interval
sampling-time that you have set
2 Performing the operation to the sampled value according to the defined formula
prialarm - formula
3 Comparing the result with the configured threshold and handling them in the way
described in the following table
Table 693 Handling the alarm entry
Case Processing
The sampled value is greater than the
configured upper limit threshold-value1
The defined event event-entry1 is triggered
The sampled value is less than the configured
lower limit threshold-value2
The defined event event-entry2 is triggered
Table 694 Add/delete an entry to/from the extended RMON alarm table
Operation Command
Add an entry to the extended
RMON alarm table
rmon prialarm entry - number alarm - var [ alarm - des ]
sampling - timer { delta | absolute | changeratio }
rising-threshold threshold - value1 event - entry1
falling-threshold threshold - value2 event - entry2 entrytype {
forever | cycle cycle - period } [ owner text ]
Delete an entry from the
extended RMON alarm table
undo rmon prialarm entry - number
Table 695 Handling the extended alarm entry
Case Processing
The result is greater than the configured
upper limit threshold-value1
The defined event event-entry1 is triggered