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RFC 9862: Path Computation Element Communication Protocol (PCEP) Extensions for Segment Routing (SR) Policy Candidate Paths

In plain English — editorial summary, not part of the RFC

A Segment Routing (SR) Policy is an ordered list of instructions called "segments" that represent a source-routed policy. Packet flows are steered into an SR Policy on a node where it is instantiated. An SR Policy is made of one or more Candidate Paths. This document specifies the Path Computation Element Communication Protocol (PCEP) extension to signal Candidate Paths of an SR Policy. Additionally, this document updates RFC 8231 to allow delegation and setup of an SR Label Switched Path (LSP) without using the path computation request and reply messages. This document is applicable to both Segment Routing over MPLS (SR-MPLS) and Segment Routing over IPv6 (SRv6).

Document record

Document ID
RFC9862
Published
October 2025
Authors
M. Koldychev; S. Sivabalan; S. Sidor; C. Barth; S. Peng; H. Bidgoli
Status
PROPOSED STANDARD
Stream
IETF
Area
rtg
Pages
26
Also known as
—
Updates:
RFC 8231

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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

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canonical URL: /rfc/9862-path-computation-element-communication-protocol-pcep-extensions-for-segment-rout