This feature enables efficient cross-domain communication in a multi-domain deployment where the Layer 2 leaf VTEPs don't have arp learning bridged configured. Without this feature, cross-domain ARP requests must be flooded across all domains, creating significant overhead in large multi-domain deployments.

S supports L3 EVPN gateway with Type 5 nexthop-self mechanism. While the nexthop-self mechanism is simple to operate, the L3 gateway lacks the support to rewrite the EVPN route distinguisher as well as the BGP route target. This feature supports an alternative L3 EVPN gateway mechanism using multi-domain L3 VRF instead. A multi-domain IP VRF allows configuring not only the local domain route distinguisher (RD) and route targets (RT), but also the remote domain route distinguisher and route targets on a DCI gateway.