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Support for Path MTU (PMTU) in the Path Computation Element (PCE) communication Protocol (PCEP).

Document Type Replaced Internet-Draft (pce WG)
Expired & archived
Authors Shuping Peng , Cheng Li , Liuyan Han , Luc-Fabrice Ndifor
Last updated 2022-05-02 (Latest revision 2021-10-21)
Replaces draft-dhody-pce-pcep-pmtu
Replaced by draft-ietf-pce-pcep-pmtu
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state Adopted by a WG
Other - see Comment Log
Document shepherd (None)
IESG IESG state Replaced by draft-ietf-pce-pcep-pmtu
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This Internet-Draft is no longer active.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 (PCE) provides path computation functions in support of traffic engineering in Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) networks. The Source Packet Routing in Networking (SPRING) architecture describes how Segment Routing (SR) can be used to steer packets through an IPv6 or MPLS network using the source routing paradigm. A Segment Routed Path can be derived from a variety of mechanisms, including an IGP Shortest Path Tree (SPT), explicit configuration, or a Path Computation Element (PCE). Since the SR does not require signaling, the path maximum transmission unit (MTU) information for SR path is not available. This document specify the extension to PCE communication protocol (PCEP) to carry path (MTU) in the PCEP messages.


Shuping Peng
Cheng Li
Liuyan Han
Luc-Fabrice Ndifor

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