An entry in this table represents MPLS-TP maintanence entity. This entry represents the ME if the source and sink MEPs are defined. An ME is a p2p entity. One ME has two such MEPs. A MEG is a group of one or more MEs. One MEG can have two or more MEPs. For P2P LSP, one MEG has one ME and this ME is associated two MEPs (source and sink MEPs) within a MEG. Each fsMplsTpMeIndex value denotes the ME within a MEG. In case of unidirectional point-to-point transport paths, a single unidirectional Maintenance Entity is defined to monitor it. In case of associated bi-directional point-to-point transport paths, two independent unidirectional Maintenance Entities are defined to independently monitor each direction. This has implications for transactions that terminate at or query a MIP, as a return path from MIP to source MEP does not necessarily exist in the MEG. In case of co-routed bi-directional point-to-point transport paths, a single bidirectional Maintenance Entity is defined to monitor both directions congruently. In case of unidirectional point-to-multipoint transport paths, a single unidirectional Maintenance entity for each leaf is defined to monitor the transport path from the root to that leaf.