http://www.rfc-editor.org/rfc/rfc7226.txt
RFC 7226: Requirements for Advanced Multipath in MPLS Networks, C. Villamizar, D. McDysan, S. Ning, A. Malis, L. Yong2014-05-01T23:00:00-00:00Advanced Multipath is a formalization of multipath techniques currently in use in IP and MPLS networks and a set of extensions to existing multipath techniques.