VRRP provides high availability of IP addresses, such as those that are used for routers or load balancers. Services that use VRRP are also referred to as VRRP routers even though the services provide functionality other than routing, such as load balancing. For information about how VRRP is used with load balancer to ensure high availability, see Chapter 7, Configuring ILB for High Availability.
A VRRP router is a router that is running the VRRP. VRRP runs on each VRRP router and manages the state of the router. A host can have multiple routers on which VRRP is configured and each router belongs to a different virtual router. You can introduce virtual routers in a local area network (LAN) by using VRRP to provide failure recovery for a router.