The pim ipv6 timer dr-switch-delay command enables the IPv6 PIM designated router (DR) switching delay function and configures a switching delay on an interface.
The undo pim ipv6 timer dr-switch-delay command disables IPv6 PIM DR switching delay on an interface.
By default, an IPv6 PIM interface sends Hello messages at an interval of 30 seconds, IPv6 PIM DR switching delay is disabled on an interface.
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Usage Scenario
Without the IPv6 PIM DR switching delay function, when the system triggers a IPv6 PIM DR switchover, the switchover takes effect immediately, and therefore data forwarding will be interrupted during the switchover period. If the network is unstable, frequent switchovers occur, affecting the multicast forwarding performance. To address this issue, run the pim ipv6 timer dr-switch-delay command to configure a DR switching delay to implement non-stop service forwarding during the switchover.
Prerequisites
The multicast routing function has been enabled using the multicast ipv6 routing-enable command in the public network instance view.
Configuration Impact
After an outbound interface changes from a DR to a non-DR, the IPv6 PIM DR switching delay function enables the interface to continue to forward data before the delay expires.
Precautions
The configuration of deleting or changing a DR switching delay takes effect only after the current switching delay expires.
The pim ipv6 timer dr-switch-delay command is mutually exclusive with the pim ipv6 silent command.<HUAWEI> system-view [~HUAWEI] multicast ipv6 routing-enable [*HUAWEI] interface GigabitEthernet 0/1/1 [*HUAWEI-GigabitEthernet0/1/1] ipv6 enable [*HUAWEI-GigabitEthernet0/1/1] pim ipv6 timer dr-switch-delay 20