Optimizations of Label Switched Path State Synchronization Procedures for a Stateful PCE
RFC 8232, “Optimizations of Label Switched Path State Synchronization Procedures for a Stateful PCE”, is a Proposed Standard document published in September 2017 by E. Crabbe, I. Minei, J. Medved, R. Varga, X. Zhang, D. Dhody. The canonical text is published by the RFC Editor.
Abstract
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.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 8232 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 8231 Path Computation Element Communication Protocol Extensions for Stateful PCE
- RFC 8233 Extensions to the Path Computation Element Communication Protocol to Compute Service-Aware Label Switched Paths
- RFC 8230 Using RSA Algorithms with CBOR Object Signing and Encryption Messages
- RFC 8234 Updates to MPLS Transport Profile Linear Protection in Automatic Protection Switching Mode
- RFC 8229 TCP Encapsulation of IKE and IPsec Packets
- RFC 8235 Schnorr Non-interactive Zero-Knowledge Proof
- RFC 8228 Guidance on Designing Label Generation Rulesets Supporting Variant Labels
- RFC 8236 J-PAKE: Password-Authenticated Key Exchange by Juggling