{"draft":"draft-ietf-mpls-spring-lsp-ping-path-sid-13","doc_id":"RFC9884","title":"Label Switched Path Ping for Segment Routing Path Segment Identifier with MPLS Data Plane","authors":["X. Min","S. Peng","L. Gong","R. Gandhi","C. Pignataro"],"format":["HTML","TEXT","PDF","XML"],"page_count":"19","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Multiprotocol Label Switching","abstract":"Segment Routing (SR) leverages source routing to steer packets\r\nthrough an ordered list of instructions called \"segments\". SR can be\r\ninstantiated over the MPLS data plane. Path Segment Identifiers\r\n(PSIDs) are used to identify and correlate bidirectional or\r\nend-to-end paths in SR networks. This document defines procedures\r\n(i.e., six new Target Forwarding Equivalence Class (FEC) Stack\r\nsub-TLVs) for the use of LSP Ping to support connectivity\r\nverification and fault isolation for SR paths that include PSIDs. The\r\nmechanisms described enable the validation and tracing of SR paths\r\nwith Path SIDs in MPLS networks, complementing existing SR-MPLS\r\nOperations, Administration, and Maintenance (OAM) capabilities.","pub_date":"October 2025","keywords":["Target FEC Stack","PSID"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC9884","errata_url":null}