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RFC 8232
Title: Optimizations of Label Switched Path
State Synchronization Procedures for
a Stateful PCE
Author: E. Crabbe,
I. Minei,
J. Medved,
R. Varga,
X. Zhang,
D. Dhody
Status: Standards Track
Stream: IETF
Date: September 2017
Mailbox: edward.crabbe@gmail.com,
inaminei@google.com,
jmedved@cisco.com,
robert.varga@pantheon.tech,
zhang.xian@huawei.com,
dhruv.ietf@gmail.com
Pages: 26
Characters: 56167
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-pce-stateful-sync-optimizations-10.txt
URL: https://www.rfc-editor.org/info/rfc8232
DOI: 10.17487/RFC8232
A stateful Path Computation Element (PCE) has access to not only the
information disseminated by the network's Interior Gateway Protocol
(IGP) but also the set of active paths and their reserved resources
for its computation. The additional Label Switched Path (LSP) state
information allows the PCE to compute constrained paths while
considering individual LSPs and their interactions. This requires a
State Synchronization mechanism between the PCE and the network, the
PCE and Path Computation Clients (PCCs), and cooperating PCEs. The
basic mechanism for State Synchronization is part of the stateful PCE
specification. This document presents motivations for optimizations
to the base State Synchronization procedure and specifies the required
Path Computation Element Communication Protocol (PCEP) extensions.
This document is a product of the Path Computation Element Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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