The hello-option override-interval command sets the interval for overriding the prune action in a Hello message.
The undo hello-option override-interval command restores the default interval.
By default, the interval for overriding the prune action in a Hello message is 2500 ms.
| Parameter | Description | Value |
|---|---|---|
| interval | Specifies the interval for overriding the prune action in a Hello message. | The value is an integer that ranges from 1 to 65535, in milliseconds. |
Usage Scenario
Hello messages sent from switches carry lan-delay and override-interval parameters. The override-interval parameter indicates the period during which a downstream switch can override the prune action.
When a switch sends a Prune message to the upstream device in the same network segment, other switches that still request multicast data need to send a Join message to the upstream device within the override-interval period.
If switches in the same network segment have different override-interval values, the maximum value is used.
The value of Prune-Pending Timer (PPT) is the sum of lan-delay and override-interval values. When receiving a Prune message from a downstream interface, the switch does not perform the prune action until the PPT times out. If the switch receives a Join message from the downstream interface in PPT, the interface cancels the Prune action.
Prerequisites
IP multicast routing has been enabled using the multicast routing-enable command.
Precautions
This command is valid for PIM-SM and PIM-DM.
The hello-option override-interval command has the same function as the pim hello-option override-interval command in the interface view. By default, if the pim hello-option override-interval command is not used, the value configured in the PIM view is used; otherwise, the value configured in the interface view is used.