This talk introduces forwarding group in OVN that can be used to load balance traffic across multiple ports.
The forwarding group is built using Openflow Select Group. Each bucket in the group corresponds to a logical switch port for a tunnel interface. Each bucket is also configured with a watch port to monitor the liveness of the port. In case of port down event, the corresponding bucket is not selected for traffic forwarding. This helps in fast switchover of traffic to the remaining ports in the group. For port liveness detection, BFD can be used on the tunnel interface.
