The multicast threshold-alarm command configures alarm threshold for multicast index resource usage.
The undo multicast threshold-alarm command restores the default alarm threshold.
By default, the alarm is generated when multicast index resource usage reaches 85%, and generated again when multicast index resource usage falls below 75%.
multicast threshold-alarm upper-limit upper-limit lower-limit lower-limit
undo multicast threshold-alarm
| Parameter | Description | Value |
|---|---|---|
| upper-limit upper-limit | Indicates the upper threshold for multicast index resource usage. | The value is an integer that ranges from 2 to 100, in percentage. |
| lower-limit lower-limit | Indicates the lower threshold for multicast index resource usage. | The value is an integer that ranges from (upper-limit - 10) to (upper-limit - 1), in percentage. |
Multicast packets are forwarded based on multicast forwarding entries no matter whether the Layer 2 or Layer 3 multicast mode is used. Multicast forwarding entries occupy independent index resources on the switch. A high index resource usage indicates that the switch has forwarded too many multicast packets and there is a heavy load on it. If the resources for multicast forwarding entries are used up, multicast packets cannot be forwarded.
After the alarm threshold is set, the switch sends a trap when index resource usage reaches the threshold. You can monitor multicast index resource usage. When index resource usage reaches the upper threshold, the alarm 1.3.6.1.4.1.2011.5.25.227.2.1.8, 1.3.6.1.4.1.2011.5.25.227.2.1.10, or 1.3.6.1.4.1.2011.5.25.227.2.1.62 is generated, indicating that the index resources will be used up. When index resource usage falls below the lower threshold, the alarm 1.3.6.1.4.1.2011.5.25.227.2.1.9, 1.3.6.1.4.1.2011.5.25.227.2.1.11, or 1.3.6.1.4.1.2011.5.25.227.2.1.63 is generated, indicating that index resource usage is restored to an acceptable range.