Recommendation ITU-T G.8113.2/Y.1372.2 specifies OAM mechanisms based on the tools defined for MPLS for data-plane OAM (operations, administration and maintenance) in MPLS-TP networks. It also specifies the MPLS-TP OAM packet formats, syntax and semantics of MPLS-TP OAM packet fields. The OAM mechanisms defined in this Recommendation assume common forwarding of the MPLS-TP user packets and MPLS-TP OAM packets.