RFC 9933 on Carrying SR-Algorithm in Path Computation Element Communication Protocol (PCEP)
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Subject: RFC 9933 on Carrying SR-Algorithm in Path Computation Element Communication Protocol (PCEP)
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A new Request for Comments is now available in online RFC libraries.
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: ssidor@cisco.com,
atokar@cisco.com,
peng.shaofu@zte.com.cn,
pengshuping@huawei.com,
andrew.stone@nokia.com
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
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