A system and protocol are provided for routing data packets from a host on a LAN through a virtual address belonging to a group of routers. The host is configured to point to the virtual address so that the packets it sends out of its LAN are always directed to a virtual router which may be any one of...http://www.google.fr/patents/US5473599?utm_source=gb-gplus-shareBrevet US5473599 - Standby router protocol
