The pim hello-option lan-delay command sets the delay in transmitting Prune messages on a shared network segment.
The undo pim hello-option lan-delay command restores the default setting.
By default, a PIM interface delays sending Prune messages on the shared network segment for 500 milliseconds.
Usage Scenario
Hello messages sent by routers carry lan-delay and override-interval. lan-delay indicates the delay in transmitting messages in the LAN. When the values of lan-delay on all routers on the same link are different, the maximum value of these values is used.
If a router receives a Prune message from the upstream interface, it indicates that other downstream routers still exist in the LAN. If the router still needs to receive multicast data, it must send a Join message to the upstream interface in the override-interval period. When receiving a Prune message from a downstream interface, the router does not perform the prune action immediately until the Prune-Pending Timer (PPT) times out. The PPT equals the value of the lan-delay plus the override-interval. If the router receives a Join message from the downstream interface in PPT, the router cancels the prune action.Prerequisites
The multicast routing-enable command is run in the public network instance view or VPN instance view.
Configuration Impact
If the pim hello-option lan-delay command is run more than once, the latest configuration overrides the previous one.
<HUAWEI> system-view [~HUAWEI] ip vpn-instance mytest [*HUAWEI-vpn-instance-mytest] ipv4-family [*HUAWEI-vpn-instance-mytest-af-ipv4] route-distinguisher 100:1 [*HUAWEI-vpn-instance-mytest-af-ipv4] multicast routing-enable [*HUAWEI-vpn-instance-mytest-af-ipv4] multicast-domain share-group 224.1.1.1 binding mtunnel 10 [*HUAWEI-vpn-instance-mytest-af-ipv4] commit [~HUAWEI-vpn-instance-mytest-af-ipv4] quit [~HUAWEI-vpn-instance-mytest] quit [~HUAWEI] interface Mtunnel 10 [~HUAWEI-MTunnel10] pim hello-option lan-delay 200