{"draft":"draft-ietf-pce-segment-routing-policy-cp-27","doc_id":"RFC9862","title":"Path Computation Element Communication Protocol (PCEP) Extensions for Segment Routing (SR) Policy Candidate Paths","authors":["M. Koldychev","S. Sivabalan","S. Sidor","C. Barth","S. Peng","H. Bidgoli"],"format":["HTML","TEXT","PDF","XML"],"page_count":"26","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Path Computation Element","abstract":"A Segment Routing (SR) Policy is an ordered list of instructions\r\ncalled \"segments\" that represent a source-routed policy. Packet flows\r\nare steered into an SR Policy on a node where it is instantiated.  An\r\nSR Policy is made of one or more Candidate Paths. \r\n\r\nThis document specifies the Path Computation Element Communication\r\nProtocol (PCEP) extension to signal Candidate Paths of an SR Policy. \r\nAdditionally, this document updates RFC 8231 to allow delegation and\r\nsetup of an SR Label Switched Path (LSP) without using the path\r\ncomputation request and reply messages.  This document is applicable\r\nto both Segment Routing over MPLS (SR-MPLS) and Segment Routing over\r\nIPv6 (SRv6).","pub_date":"October 2025","keywords":["PCEP","SR Policy","Candidate Path"],"obsoletes":[],"obsoleted_by":[],"updates":["RFC8231"],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC9862","errata_url":null}