Configuring IPv6 VRRP packet attributes
Restrictions and guidelines
The routers in an IPv6 VRRP group can have different intervals for sending VRRP advertisements. The master in the VRRP group sends VRRP advertisements at the specified interval and carries the interval attribute in the advertisements. After a backup receives the advertisement, it records the interval in the advertisement. If the backup does not receive a VRRP advertisement before the timer (3 x recorded interval + Skew_Time) expires, it regards the master as failed and takes over.
A high volume of network traffic might cause a backup to fail to receive VRRP advertisements from the master within the specified time. As a result, an unexpected master switchover occurs. To solve this problem, configure a larger interval.
Procedure
Enter system view.
system-view
Enter interface view.
interface interface-type interface-number
Set the IPv6 VRRP advertisement interval.
vrrp ipv6 vrid virtual-router-id timer advertise adver-interval
The default setting is 100 centiseconds.
As a best practice to maintain system stability, set the VRRP advertisement interval to be greater than 100 centiseconds.
Return to system view.
quit
Set a DSCP value for IPv6 VRRP packets.
vrrp ipv6 dscp dscp-value
By default, the DSCP value for IPv6 VRRP packets is 56.
The DSCP value identifies the packet priority during transmission.