This Supplement provides the requirements for the operation, administration and maintenance (OAM) functionality in T-MPLS layer networks from the perspective of transport networks and provides considerations for the application of IETF MPLS technology. These requirements may be met by one or more toolsets, the definition or selection of these toolsets is outside the scope of this Supplement. This Supplement is designed tosupport point-to-point and point-to-multipoint T-MPLS connections.