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PCEP Extensions for Associated Bidirectional Segment Routing (SR) Paths

Document Type Replaced Internet-Draft (pce WG)
Expired & archived
Authors Cheng Li , Mach Chen , Weiqiang Cheng , Rakesh Gandhi , Quan Xiong
Last updated 2020-02-07 (Latest revision 2020-02-06)
Replaced by draft-ietf-pce-sr-bidir-path
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Stream WG state Adopted by a WG
Document shepherd (None)
IESG IESG state Replaced by draft-ietf-pce-sr-bidir-path
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


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. The Stateful PCE extensions allow stateful control of Multiprotocol Label Switching (MPLS) Traffic Engineering (TE) Label Switched Paths (LSPs) using PCEP. Furthermore, PCEP can be used for computing paths in Segment Routing (SR) TE networks. This document defines PCEP extensions for grouping two reverse unidirectional SR Paths into an Associated Bidirectional SR Path when using a Stateful PCE for both PCE-Initiated and PCC-Initiated LSPs as well as when using a Stateless PCE.


Cheng Li
Mach Chen
Weiqiang Cheng
Rakesh Gandhi
Quan Xiong

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)