"Virtual Router Redundancy Protocol (VRRP) is a simple, yet robust practice that can provide additional availability in your network. VRRP can be implemented using Red Hat Enterprise Linux and/or the VRRPd open source implementations.
"VRRP provides gateway redundancy by allowing each router within the redundant router topology to share a virtual Ethernet MAC address and a virtual IP address. When the virtual addresses are active on a particular router, the router is said to be the master. Routers without control of the virtual addresses are referred to as backups..."
