Layer 2 VPN domains are created by adding PWs to each peer LSR to build a fully-meshed interconnected VPLS.
For each peer added, a PW is signaled that is used to carry traffic from the local LSR to the remote peer LSR. Flood traffic from the local service (broadcast, multicast, and unknown unicast packets) is replicated and forwarded across all PWs in the VPLS. Each peer receives one copy of the packet for delivery to its locally attached service. As MAC learning occurs on PWs, unicast packets to a known destination MAC address are forwarded to the peer over the PW from which the MAC address was learned.