Virtual IP address (VIP)

The VIP associated with a VR must be a real IP address already configured in the associated VLAN interface on the owner router in the VR. If the VIP is an IPv6 address, a link-local address must be configured before adding a global IPv6 address. Also, the owner and all other (backup) routers belonging to the VR have this IP address configured in their VRID contexts as the VIP. In Example of using VRRP to provide redundant network access, 10.10.100.1 is a real IP address configured on VLAN 100 in Router 1 and is the VIP associated with VR 1.

If the configured owner in a VR becomes unavailable, it is no longer the master for the VR and a backup router in the VR is elected to assume the role of master, as described under Backup router.

A subnetted VLAN allows multiple VIPs. However, if there are 32 or fewer IP addresses in a VLAN interface, and you want VRRP support on multiple subnets, the recommended approach is to configure a separate VR instance for each IP address in the VLAN. In cases where VRRP support is needed for more than 32 IP addresses in the same VLAN.