The vrrp6 vrid timer advertise command configures an interval at which the master router in a Virtual Router Redundancy Protocol for IPv6 (VRRP6) backup group sends VRRP6 Advertisement packets.
The undo vrrp6 vrid timer advertise command restores the default interval.
By default, the master router in a VRRP6 backup group sends a VRRP6 Advertisement packet every 1 second.
| Parameter | Description | Value |
|---|---|---|
| virtual-router-id |
Specifies the ID of a VRRP6 backup group. |
The value is an integer ranging from 1 to 255. |
| advertise-interval |
Specifies an interval at which the master router in a VRRP6 backup group sends VRRP6 Advertisement packets. |
The value is an integer ranging from 100 to 4095, in centiseconds. |
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Usage Scenario
The master router in a VRRP6 backup group periodically sends VRRP6 Advertisement packets to the backup routers in the group to notify them of its status. If the backup routers do not receive VRRP6 Advertisement packets from the master router after a period three times (As defined in relevant standards protocols: Interval specified by master-down-interval= (256 - priority)/256 + 3 x timer. According to the formula, the default interval specified by master-down-interval is about three times the interval specified by advertise-interval.) if the interval at which VRRP6 Advertisement packets are sent, the master router is considered Down and the backup router with the highest priority becomes the master router. If a backup router does not receive a VRRP6 Advertisement packet within a specified timeout period due to heavy network traffic or timer differences, a master/backup VRRP6 switchover is performed.
To prevent this situation, configure a large interval at which the master router sends VRRP6 Advertisement packets. To configure an interval at which the master router in a VRRP6 backup group sends VRRP6 Advertisement packets, run the vrrp6 vrid timer advertise command.Prerequisites
A VRRP6 backup group has been created using the vrrp6 vrid command.
<HUAWEI> system-view [~HUAWEI] interface GigabitEthernet 0/1/1 [~HUAWEI-GigabitEthernet0/1/1] ipv6 enable [*HUAWEI-GigabitEthernet0/1/1] ipv6 address 2001:db8::1 64 [*HUAWEI-GigabitEthernet0/1/1] vrrp6 vrid 1 virtual-ip FE80::7 link-local [*HUAWEI-GigabitEthernet0/1/1] vrrp6 vrid 1 timer advertise 500