Learning OpenStack Networking - Third Edition

VRRP priority

Routers in the VRRP group elect a master router according to their priorities. The router with the highest priority is elected master, while the other routers in the group are relegated to backup duties. When a master router fails to send its VRRP advertisements to the group, the backup routers in the VRRP group elect a new master to replace the failed master.

VRRP priorities range from 0 to 255, with 255 being the highest priority. Neutron configures each router in a group with the same priority of 50. Because the priority is the same between routers, in the event of a failover, the election process falls back to the highest IP address. That is to say that a backup router with IP address 192.168.1.200 on the HA interface will ...