vrrp Redundancy Protocol principle of availability keepalived

vrrp Virtual Router Redundancy Protocol

1, ip use as a transport protocol packet;

2, protocol number 112;

3, using a fixed network 224.0.0.18 multicast transmission;

4, only messages with advertisement;

master election:

1, comparing each priority router equipment, big priority for the master. The same priority, comparing the interface IP address, the address becomes large master;

2, the transmission will automatically cycle master advertisement packets, one second transmission time;

3, backup if three seconds has not received the message sent by the master advertisment, shows master Down;

4