BGP link-state distribution with SPRING extensions

BGP link-state extensions export source packet routing in networking (SPRING) topology information to software-defined networking controllers. Controllers can get the topology information by either being a part of an interior gateway protocol (IGP) domain or through BGP link-state distribution. BGP link-state distribution is supported on inter-domain networks and provides a scalable mechanism to export the topology information. This feature benefits networks that are moving to SPRING but also have RSVP deployed, and continue to use both SPRING and RSVP in their networks.