The other way of handling high availability of the network service in OpenStack is based on the concept of VRRP. Unlike legacy and DVR-based routers, using VRRP has different requirements, as follows:
- VRRP groups set up for virtual routers
- Multiple network nodes
- An additional dedicated network for high availability traffic
- Designation of master and slave routers using virtual IPs
In a VRRP setup, a master router is configured with a virtual IP (VIP) that represents the next route hop acting as the default IP address for the routers pool. The network traffic load can also be spread amongst the available routers within the VRRP router group that can be configured based on the scheduler mechanism in the master router. In ...