EVPN-VXLAN: IGMP snooping in EVPN-VXLAN bridged overlays

With IGMP snooping, the devices in an EVPN-VXLAN network forward multicast traffic flows only to the hosts that subscribe to those flows, rather than flooding the traffic to all hosts. Now you can enable Layer 2 (L2) multicast with IGMP snooping for intra-VLAN IPv4 multicast traffic in an EVPN-VXLAN bridged overlay network with:

• IPv4 or IPv6 underlay peering in the EVPN-VXLAN network with IPv4 multicast data traffic.
• MAC-VRF EVPN instances with vlan-based or vlan-aware service types.
• Enterprise-style interfaces.

You must configure the bridge domains (VLANs) symmetrically on EVPN multihoming peer devices.