Internet-Draft draft-ietf-pce-state-sync-12.txt is now available. It is a work
item of the Path Computation Element (PCE) WG of the IETF.
Title: Procedures for Communication between Stateful Path Computation
Elements
Authors: Haomian Zheng
Stephane Litkowski
Siva Sivabalan
Cheng Li
Name: draft-ietf-pce-state-sync-12.txt
Pages: 37
Dates: 2025-05-29
Abstract:
The Path Computation Element (PCE) Communication Protocol (PCEP)
provides mechanisms for PCEs to perform path computation in response
to a Path Computation Client (PCC) request. The Stateful PCE
extensions allow stateful control of Multi-Protocol Label Switching
(MPLS) Traffic Engineering (TE) and Generalized Multi-Protocol Label
Switching (GMPLS) Label Switched Paths (LSPs) using PCEP.
A Path Computation Client (PCC) can synchronize LSP state information
to a Stateful Path Computation Element (PCE). A PCC can have
multiple PCEP sessions towards multiple PCEs. In some use cases,
inter-PCE stateful communication can bring additional resiliency in
the design, for instance, when some PCC-PCE session fails.
This document describes the procedures to allow stateful
communication between PCEs for various use cases and also the
procedures to prevent computational loops.
The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-pce-state-sync/
There is also an HTML version available at:
https://www.ietf.org/archive/id/draft-ietf-pce-state-sync-12.html
A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-pce-state-sync-12
Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts
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