RFC7432 defines the MAC/IP advertisement NLRI (route type 2) for exchanging EVPN overlay end-hosts’ MAC and IP address reachability information. When an EVPN MAC/IP route contains more than one path to the same destination, the EVPN MAC/IP best-path selection algorithm determines which of these paths should be considered as the best path.

BGP routing information often contains more than one path to the same destination network. The BGP best-path selection algorithm determines which of these paths should be considered as the best path to that network.