Verfahren zur Ausführung eines Routerschnittstellen-Backups mit VRRP (Virtual Router Redundancy Protocol)

摘要

Disclosed is a method for implementing router interface backup with Virtual Router Redundancy Protocol (VRRP). The method includes the steps of: connecting multiple interfaces (1) of a router or routers to the same LAN and adding these multiple interfaces (1) to the same multicast group (2); configuring the same virtual router number and virtual IP address to these interfaces (1) to make them join the same virtual router (3); selecting the main interface (4) and backup interfaces (5) according to their respective priorities among said interfaces (1); and sending VRRP multicast packets from the main interface (4) to all backup interfaces (5) periodically; if the priority involved in the just received VRRP multicast packet is zero or the backup interfaces (5) have not received any VRRP multicast packet within a predetermined period, one backup interface (5) becoming the main interface and replacing the original one. The invention implements backup between interfaces in a router or routers without affecting the original VRRP backup function between routers.