interfaces, but may be empty as well (this is the default ). If this table is empty, it is due to
one of the following reasons:
•
RMON Group 3 is not supported on this device.
•
RMON Group 3 is supported but there are no control threshold entries. You can create a
threshold entry for any interface by clicking on the
Create
button. The Add RMON Group 3
window opens.
Figure 33. Add RMON Group 3 Window
You are required to enter some information describing the threshold information:
•
Interface Index
(or index of the selected MIB variable).
•
Reporting Interval:
In seconds, e.g.: 10 sec or 1 sec.
•
What to monitor:
You can select one of the predefined IfTable (MIB-II) counters, e.g.:
InErrors (Input Errors) or any MIB variable. You may also refer to “
Interfaces Statistics
(per interface)
” section earlier for more information on MIB-2 counters.
•
Sample Type:
Select the method of sampling: Absolute means that the threshold will be
applied to the counter’s absolute value. Delta means that the threshold will be applied to the
counter changes during the sampling interval.
•
Rising Threshold:
A single event will be generated after the sampled value exceeds this
threshold. The next Rising event alarm will be generated only after the threshold for a
Falling Event (see below) has been reached.
•
Falling Threshold:
A single event will be generated after the sampled value falls below
this threshold. The next Falling event will be generated only after the threshold for a Rising
Event (see above) has been reached.
