Configuring the Upper and Lower Alarm Thresholds for PIM Entries

Context

A switch supports a limited number of PIM entries. After the number of PIM entries reaches the maximum value, no more PIM entries can be created. As a result, some multicast traffic cannot be forwarded. To facilitate network operations and maintenance, configure the upper and lower alarm thresholds for PIM entries. PIM entry alarms and clear alarms help you learn PIM entry usage in a timely manner. You can adjust the alarm thresholds for PIM entries based on service requirements.

Procedure

Run system-view
The system view is displayed.
Run multicast-mib
The multicast management information base (MIB) view is displayed.
Run pim { star-group-number | source-group-number } threshold-alarm upper-limit upper-limit-value lower-limit lower-limit-value
The upper and lower alarm thresholds for PIM entries are set.
- star-group-number indicates the alarm thresholds set for PIM (*, G) entries.
- source-group-number indicates the alarm thresholds set for PIM (S, G) entries.
- upper-limit-value specifies the upper alarm threshold. If the proportion of existing PIM entries to the maximum number reaches this threshold, a PIM entry alarm is reported.
- lower-limit-value specifies the lower alarm threshold. If the proportion of existing PIM entries to the maximum number falls below this threshold, a PIM entry clear alarm is reported.
- upper-limit-value must be larger than lower-limit-value.
By default, upper-limit-value is 80% and lower-limit-value is 75%.