A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Path Computation Element WG of the IETF.
Title : Inter Stateful Path Computation Element (PCE)
Communication Procedures.
Authors : Stephane Litkowski
Siva Sivabalan
Cheng Li
Haomian Zheng
Filename : draft-ietf-pce-state-sync-01.txt
Pages : 32
Date : 2021-10-20
Abstract:
The Path Computation Element Communication Protocol (PCEP) provides
mechanisms for Path Computation Elements (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) Label Switched Paths
(LSPs) using PCEP.
A Path Computation Client (PCC) can synchronize an LSP state
information to a Stateful Path Computation Element (PCE). A PCC can
have multiple PCEP sessions towards multiple PCEs. There are some
use cases, where an 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 a stateful
communication between PCEs for various use-cases and also the
procedures to prevent computations loops.
The IETF datatracker status page for this 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-01.html
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-pce-state-sync-01
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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