US Patent 10033539 Replicating multicast state information between multi-homed EVPN routing devices

In one example, a first routing device of an Ethernet virtual private network (EVPN) is multihomed to a customer edge (CE) routing device with a second routing device. The first routing device includes one or more network interfaces configured to send and receive packets. The first routing device also includes one or more processors configured to receive, via the one or more network interfaces, a first packet from the CE routing device including multicast join information, update multicast state information of the first routing device using the multicast join information from the first packet, and send, via the one or more network interfaces, a second packet including data representative of the multicast join information to the second routing device to synchronize multicast state information of the second routing device with the multicast state information of the first routing device.