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Encoding of Objective Functions in the Path Computation Element Communication Protocol (PCEP)
RFC 5541

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Document history

Date By Action
2018-12-20
(System)
Received changes through RFC Editor sync (changed abstract to 'The computation of one or a set of Traffic Engineering Label Switched Paths (TE LSPs) in …
Received changes through RFC Editor sync (changed abstract to 'The computation of one or a set of Traffic Engineering Label Switched Paths (TE LSPs) in MultiProtocol Label Switching (MPLS) and Generalized MPLS (GMPLS) networks is subject to a set of one or more specific optimization criteria, referred to as objective functions (e.g., minimum cost path, widest path, etc.).

In the Path Computation Element (PCE) architecture, a Path Computation Client (PCC) may want a path to be computed for one or more TE LSPs according to a specific objective function. Thus, the PCC needs to instruct the PCE to use the correct objective function. Furthermore, it is possible that not all PCEs support the same set of objective functions; therefore, it is useful for the PCC to be able to automatically discover the set of objective functions supported by each PCE.

This document defines extensions to the PCE communication Protocol (PCEP) to allow a PCE to indicate the set of objective functions it supports. Extensions are also defined so that a PCC can indicate in a path computation request the required objective function, and a PCE can report in a path computation reply the objective function that was used for path computation.

This document defines objective function code types for six objective functions previously listed in the PCE requirements work, and provides the definition of four new metric types that apply to a set of synchronized requests. [STANDARDS-TRACK]')
2017-05-16
(System) Changed document authors from "Young Lee" to "Young Lee, Jean-Louis Le Roux, JP Vasseur"
2015-10-14
(System) Notify list changed from pce-chairs@ietf.org, draft-ietf-pce-of@ietf.org to (None)
2009-06-10
Cindy Morgan State Changes to RFC Published from RFC Ed Queue by Cindy Morgan
2009-06-10
Cindy Morgan [Note]: 'RFC 5541' added by Cindy Morgan
2009-06-09
(System) RFC published