http://www.rfc-editor.org/rfc/rfc7412.txt
RFC 7412: Requirements for MPLS Transport Profile (MPLS-TP) Shared Mesh Protection, Y. Weingarten, S. Aldrin, P. Pan, J. Ryoo, G. Mirsky2014-12-01T23:00:00-00:00This document presents the basic network objectives for the behavior of Shared Mesh Protection (SMP) that are not based on control-plane support. This document provides an expansion of the basic requirements presented in RFC 5654 ("Requirements of an MPLS Transport Profile") and RFC 6372 ("MPLS Transport Profile (MPLS-TP) Survivability Framework"). This document provides requirements for any mechanism that would be used to implement SMP for MPLS-TP data paths, in networks that delegate protection switch coordination to the data plane.