Configures the sub-second intervals at which the master VRRP-Ev3 device advertises its existence to the backup routers.
The default advertisement interval scale is 1.
Virtual-router-group configuration mode
This command scales the advertisement interval of the master VRRP-Ev3 device as configured by the advertisement-interval command. A value of 1, 2, 5, or 10 can be set and the existing advertisement interval value is divided by the scaling value. For example, if the advertisement interval is 1 second and the scaling value is 10, the new advertisement interval is 100 milliseconds.
When all the advertisement intervals in a VRRP-Ev3 session are scaled, sub-second VRRP-Ev3 convergence is possible if a master fails. The advertisement notifies the backup devices that the master is still active. If the backup devices do not receive an advertisement from the master in a designated amount of time, the backup device with the highest priority can assume the role of master. Using sub-second advertising intervals, sub-second device redundancy can be achieved.
Note that the minimum advertisement interval for the ipv6-vrrp-extended-group command is 1000 milliseconds, so configure the intervals for the advertisement-interval and advertisement-interval-scale commands accordingly.
This command is only supported by VRRP-Ev3.
This example sets the scaling of the advertisement interval to 500 milliseconds for VRRP-Ev3 group 19.
device# configure terminal device(config)# interface ve 2019 device(config-ve-25)# ipv6 vrrp-extended-group 19 device(config-vrrp-extended-group-10)# advertisement-interval 1 device(config-vrrp-extended-group-10)# advertisement-interval-scale 2