The pim hello-option override-interval command sets the interval carried in Hello messages for overriding the prune action on the interface.
The undo pim hello-option override-interval command, restores the default configuration.
By default, the interval carried in Hello messages for overriding the prune action on the interface is 2500 milliseconds.
| Parameter | Description | Value |
|---|---|---|
| interval | Specifies the interval of overriding the prune action. | The value is an integer that ranges from 1 to 65535, in milliseconds. |
GE interface view, XGE interface view, MultiGE interface view, 25GE interface view, 40GE interface view, 100GE interface view, Eth-Trunk interface view, GE sub-interface view, XGE sub-interface view, MultiGE sub-interface view, 25GE sub-interface view, 40GE sub-interface view, 100GE sub-interface view, Eth-Trunk sub-interface view, VLANIF interface view, loopback interface view, tunnel interface view
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.
Configuration Impact
If you run the pim hello-option override-interval command multiple times, only the latest configuration takes effect.
Precautions
This command is valid for PIM-SM and PIM-DM.
The pim hello-option override-interval command has the same function as the hello-option override-interval (IPv4) command in the PIM 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.
<HUAWEI> system-view [HUAWEI] multicast routing-enable [HUAWEI] interface vlanif 100 [HUAWEI-Vlanif100] pim hello-option override-interval 2000
<HUAWEI> system-view [HUAWEI] multicast routing-enable [HUAWEI] interface gigabitethernet 0/0/1 [HUAWEI-GigabitEthernet0/0/1] undo portswitch [HUAWEI-GigabitEthernet0/0/1] pim hello-option override-interval 2000