scope:

This Recommendation provides architecture and mechanisms for pseudowire (PW) dual-homing protection in multi-protocol label switching transport profile (MPLS-TP) networks. It also describes the dual-homing coordination (DHC) protocol defined in [IETF RFC 8184] and [IETF RFC 8185].

Both one-side and two-side dual-homing protection mechanisms are provided.

The mechanisms defined herein protect point-to-point MPLS-TP PWs against failures within or at the edges of the MPLS-TP network.

This Recommendation provides a representation of the MPLS-TP technology using the methodologies that have been used for other transport technologies (e.g., synchronous digital hierarchy (SDH), optical transport network (OTN) and the Ethernet).¹

¹ This ITU-T Recommendation is intended to be aligned with the IETF MPLS RFCs normatively referenced by this Recommendation.