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 carry export targets. When a VTEP receives a route, it compares the export targets of the route with the local import targets.
The current release supports only MAC/IP advertisement routes and Inclusive multicast Ethernet tag (IMET) routes.