EVPN-MPLS: All-active multihoming support

The Ethernet VPN (EVPN) solution is extended to provide multihoming functionality in the active-active redundancy mode of operation. This feature enables load balancing of Layer 2 unicast traffic across all the multihomed links on and toward a customer edge device. The EVPN active-active multihoming feature provides link-level and node-level redundancy along with effective utilization of resources. To enable EVPN active-active multihoming, include the all-active statement at the [edit interfaces esi] hierarchy level.