Virtual Router Redundancy Protocol version 2

Junos OS supports Virtual Router Redundancy Protocol (VRRP) version 2 configuration. VRRP enables hosts on a LAN to make use of redundant routers on that LAN without requiring more than the static configuration of a single default route on the hosts. Routers running VRRP share the IP address corresponding to the default route configured on the hosts. At any time, one of the routers running VRRP is the primary (active) and the others are backups. If the primary fails, one of the backup routers becomes the new primary router, providing a virtual default router and enabling traffic on the LAN to be routed without relying on a single router. Using VRRP, a backup router can take over a failed default router within a few seconds. This is done with minimum VRRP traffic and without any interaction with the hosts.