Extensions to the Path Computation Element Protocol (PCEP) for residual path bandwidth support

Document Type Expired Internet-Draft (candidate for pce WG)
Authors Francesco Lazzeri  , Daniele Ceccarelli  , Young Lee  , Dhruv Dhody 
Last updated 2019-02-11 (latest revision 2018-02-26)
Stream IETF
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state Call For Adoption By WG Issued
Polled for WG adoption but not adopted
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The PCEP protocol has objective functions to optimize path attributes like the residual bandwidth. While this is enough for some applications, it's not possible to return the computed values of such attributes to the PCC, or put bounds on them. This document describes extensions to the PCE Communication Protocol (PCEP) providing new path-related bandwidth metrics allowing a PCE to compute paths taking into account and returning to the PCC information about the remaining bandwidth along the computed paths.


Francesco Lazzeri (francesco.lazzeri@ericsson.com)
Daniele Ceccarelli (daniele.ceccarelli@ericsson.com)
Young Lee (leeyoung@huawei.com)
Dhruv Dhody (dhruv.ietf@gmail.com)

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