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IETF RFC 5541
[ACTIVE]

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

Metadata

Publisher
IETF
Doc Type
Standard
Pages
23
Abstract
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]
Publication Date
2009-06-01
Status Note
Proposed Standard
DOI
10.17487/RFC5541
Link
https://doi.org/10.17487/RFC5541
Author(s)
Jean-Louis Le Roux
JP Vasseur
Young Lee
Keyword(s)
PCE
Latest version of IETF RFC 5541

Document Versions — IETF RFC 5541

  • ▶ IETF RFC 5541 (2009-06-01)
    THIS DOC [ACTIVE] [LATEST VERSION]

Normative Reference(s)

Bibliographic Reference(s)

  • Lee, Y., Le Roux, JL., King, D., and E. Oki, "Path Computation Element Communication Protocol (PCEP) Requirements and Protocol Extensions in Support of Global Concurrent Optimization", Work in Progress, March 2009. EXTERNAL
  • Koushik, K., and E. Stephan, "PCE Communication Protocol (PCEP) Management Information Base", Work in Progress, January 2009. EXTERNAL
  • IETF RFC 4657 [Active*]
  • IETF RFC 4674 [Active*]
  • IETF RFC 5088 [Active*]
  • IETF RFC 5089 [Active*]
  • IETF RFC 5226 [Superseded*]
  • IETF RFC 5511 [Active*]
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IETF RFC 5541, Encoding of Objective Functions in the Path Computation Element Communication Protocol (PCEP). Available at https://doi.org/10.17487/RFC5541
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IETF RFC 5541, Encoding of Objective Functions in the Path Computation Element Communication Protocol (PCEP). Available at https://doi.org/10.17487/RFC5541

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IETF RFC 5541, Encoding of Objective Functions in the Path Computation Element Communication Protocol (PCEP). Available at https://doi.org/10.17487/RFC5541
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<span class="citation"><cite>IETF RFC 5541</cite>, Encoding of Objective Functions in the Path Computation Element Communication Protocol (PCEP). Available at <a href="https://doi.org/10.17487/RFC5541" target="_blank" rel="noopener">https://doi.org/10.17487/RFC5541</a></span>

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IETF RFC 5541, Encoding of Objective Functions in the Path Computation Element Communication Protocol (PCEP)
doi: 10.17487/RFC5541
url: https://doi.org/10.17487/RFC5541
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<li>
<cite id="bib-rfc5541">IETF RFC 5541</cite>, Encoding of Objective Functions in the Path Computation Element Communication Protocol (PCEP)
<span class="doi">10.17487/RFC5541</span>
</li>

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