https://datatracker.ietf.org/doc/draft-gredler-idr-bgplu-epe/
draft-gredler-idr-bgplu-epe-16 - Egress Peer Engineering using BGP-LU
The MPLS source routing paradigm provides path control for both intra- and inter- Autonomous System (AS) traffic. RSVP-TE is utilized for intra-AS path...