This Recommendation defines parameters that may be used in specifying and assessing the performance of speed, accuracy, dependability, and availability of packet (labelled or not–in the latter case, Penultimate Hop Popping (PHP) may cause loss of Label Switched Paths (LSP) identity at the network edges) transfer over an LSP on a Multi-Protocol Label Switching (MPLS) network. The defined parameters apply to end-to-end, point-to-point and multipoint-to-point LSP and to any MPLS domain that provides, or contributes to the provision of, packet transfer services in accordance with the normative references specified in clause 2.