Summary

ITU-T Recommendation G.8131/Y.1382 provides requirements and mechanisms for end-to-end trail and SNC protection switching for Transport MPLS (T-MPLS) networks. It describes the trail protection and SNC protection architectures types, the uni- and bidirectional switching types and the revertive/non-revertive operation types. It defines the automatic protection switching (APS) protocol used to align both ends of the protected domain.