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RFC 9933
Title: Carrying SR-Algorithm in Path Computation Element
Communication Protocol (PCEP)
Author: S. Sidor,
Z. Rose,
S. Peng,
S. Peng,
A. Stone
Status: Proposed Standard
Stream: IETF
Date: July 2026
Mailbox: [email protected],
[email protected],
[email protected],
[email protected],
[email protected]
Pages: 26
Updates: RFC 8664, RFC 9603
I-D Tag: draft-ietf-pce-sid-algo-29
URL: https://www.rfc-editor.org/info/rfc9933
DOI: 10.17487/RFC9933
This document specifies extensions to the Path Computation Element
Communication Protocol (PCEP) to enhance support for Segment Routing (SR) with
a focus on the use of Segment Identifiers (SIDs) and SR-Algorithms in Traffic
Engineering (TE). The SR-Algorithm associated with a SID defines the path
computation algorithm used by Interior Gateway Protocols (IGPs). It introduces
mechanisms for PCEP peers to signal the SR-Algorithm associated with SIDs by
encoding this information in Explicit Route Object (ERO) and Record Route
Object (RRO) subobjects, enables SR-Algorithm constraints for path computation,
and defines new metric types for the METRIC object. This document updates RFC
8664 and RFC 9603 to allow such extensions.
This document is a product of the Path Computation Element Working Group of the
IETF.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and
suggestions for improvements. Distribution of this memo is unlimited.
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