Internet-Draft draft-ietf-pce-sr-bidir-path-21.txt is now available. It is a
work item of the Path Computation Element (PCE) WG of the IETF.
Title: Path Computation Element Communication Protocol (PCEP) Extensions
for Associated Bidirectional Segment Routing (SR) LSPs
Authors: Cheng Li
Mach(Guoyi) Chen
Weiqiang Cheng
Rakesh Gandhi
Quan Xiong
Name: draft-ietf-pce-sr-bidir-path-21.txt
Pages: 18
Dates: 2026-02-04
Abstract:
The Path Computation Element Communication Protocol (PCEP) provides
mechanisms for Path Computation Elements (PCEs) to perform path
computations in response to Path Computation Clients (PCCs) requests.
Segment Routing (SR) can be used to steer packets through a network
employing the source routing paradigm. SR can be applied to both
MPLS (SR-MPLS) and IPv6 (SRv6) data planes. Stateful PCEP extensions
for SR allow a PCE to maintain state and to control and initiate SR
Traffic Engineering (TE) LSPs.
PCEP supports grouping of two unidirectional MPLS-TE Label Switched
Paths (LSPs), signaled via RSVP-TE, using association. This document
defines PCEP extensions for grouping two unidirectional SR LSPs (one
in each direction in the network) into a single associated
bidirectional SR LSP. The mechanisms defined in this document are
applicable to both stateless and stateful PCEs for PCE-initiated and
PCC-initiated LSPs.
The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-pce-sr-bidir-path/
There is also an HTMLized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-pce-sr-bidir-path-21
A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-pce-sr-bidir-path-21
Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts
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