Auto-discovery via EVPN

VTEPs use BGP EVPN routes to discover VTEP neighbors, establish VXLAN tunnels, and assign the tunnels to VXLANs.

  • IMET route—VTEPs advertise their VXLAN IDs through IMET routes. If two VTEPs have the same VXLAN ID, they automatically establish a VXLAN tunnel and assign the tunnel to the VXLAN. This can be used to create the replication list for the forwarding of Broadcast, Unknown Unicast, and Multicast (BUM) traffic.

  • MAC/IP advertisement route and IP prefix advertisement route—In the EVPN deployment, VTEPs advertise MAC/IP advertisement routes or IP prefix advertisement routes which are imported by the other VTEPs based on route targets.