Overview VRRPv3

VRRPv3 (short for Virtual Router Redundancy Protocol Version 3) is one fault tolerance protocol. It ensures that when the next-hop device of the host fails, it can be replaced by another device in time, so as to ensure the continuity and reliability of the communication. To make VRRPv3 work, first create one virtual IP address and MAC address. In this way, add one virtual device in the network. However, when the host in the network communicates with the virtual device, do not need to know any information of the physical device on the network. One virtual device comprises one host (master) and several slave devices (backup). The master device realizes the real forwarding function. When the master device fails, the slave device becomes the new master device and takes over its work.

The master device mentioned in the following text is replaced by “Master” and the slave device is replaced by “Backup”.