When a highly-available router is created, Neutron creates a VRRP group composed of at least two router namespaces by default. The namespaces are spread across multiple hosts running the Neutron L3 agent, and each runs the keepalived service with an automatically generated configuration. Traffic between the routers uses a dedicated network interface, which is discussed in the following section.
Networking of highly available routers
Dedicated HA network
Routers in a VRRP group communicate among one another over a dedicated HA network. An HA router is automatically configured with an interface prefixed with that is only used for this communication.
The first time an HA router is created in a project, Neutron configures a network...
