In this example, two VRRP groups are configured to work in multi-gateway load balancing mode. Devices in the VRRP groups back up each other and load-balance traffic.
In this example, a VRRP group is specified as a gateway connected to CEs in each Layer 3 virtual private network (L3VPN). This configuration allows various VRRP groups to load-balance traffic and hosts at different sites in each VPN to communicate with each other.
In this example, a VRRP group is associated with a BFD session. If the interface on which the VRRP status is Master or the link monitored by BFD goes Down, a backup device in the VRRP group preempts the Master state and takes over.
In this example, a VRRP group is associated with an NQA test instance. When NQA detects that a cross-device uplink goes Down, it instructs the VRRP group to perform a master/backup switchover.
This section provides an example for configuring a unicast VRRP group to implement the master/backup status negotiation between two devices on a Layer 3 network.