Peer VTEP Reachability
In the above figure there are five paths between the two sites:
- MPLS - Ip11, ip21
- Internet Ip12 - ip22
- Internet Ip12 - ip23
- Internet Ip13 - ip22
- Internet Ip13 - ip23
Currently peer VTEP reachability needs to be configured statically, but, in future this is exchanged through BGP. BGP runs on the same loopback interface used as VXLAN source VREP interface in underlay.
The router tracks if the configured paths are available using routing updates, interface state and so on, and programs the available paths for forwarding.