Path Computation Element Communication Protocol (PCEP) Requirements for Wavelength Switched Optical Network (WSON) Routing and Wavelength Assignment
RFC 7449

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Internet Engineering Task Force (IETF)                       Y. Lee, Ed.
Request for Comments: 7449                                        Huawei
Category: Informational                                G. Bernstein, Ed.
ISSN: 2070-1721                                        Grotto Networking
                                                           J. Martensson
                                                                   Acreo
                                                               T. Takeda
                                                                     NTT
                                                            T. Tsuritani
                                                                    KDDI
                                                     O. Gonzalez de Dios
                                                              Telefonica
                                                           February 2015

  Path Computation Element Communication Protocol (PCEP) Requirements
             for Wavelength Switched Optical Network (WSON)
                   Routing and Wavelength Assignment

Abstract

   This memo provides application-specific requirements for the Path
   Computation Element Communication Protocol (PCEP) for the support of
   Wavelength Switched Optical Networks (WSONs).  Lightpath provisioning
   in WSONs requires a Routing and Wavelength Assignment (RWA) process.
   From a path computation perspective, wavelength assignment is the
   process of determining which wavelength can be used on each hop of a
   path and forms an additional routing constraint to optical light path
   computation.  Requirements for PCEP extensions in support of optical
   impairments will be addressed in a separate document.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7449.

Lee, et al.                   Informational                     [Page 1]
RFC 7449             PCEP Requirements for WSON RWA        February 2015

Copyright Notice

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   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   described in the Simplified BSD License.

Table of Contents

   1. Introduction ....................................................3
   2. WSON RWA Processes and Architecture .............................4
   3. Requirements ....................................................5
      3.1. Path Computation Type Option ...............................5
      3.2. RWA Processing .............................................6
      3.3. Bulk RWA Path Request/Reply ................................6
      3.4. RWA Path Reoptimization Request/Reply ......................7
      3.5. Wavelength Range Constraint ................................7
      3.6. Wavelength Assignment Preference ...........................7
      3.7. Signal-Processing Capability Restriction ...................8
   4. Manageability Considerations ....................................8
      4.1. Control of Function and Policy .............................8
      4.2. Information and Data Models (e.g., MIB Module) .............9
      4.3. Liveness Detection and Monitoring ..........................9
      4.4. Verifying Correct Operation ................................9
      4.5. Requirements on Other Protocols and Functional Components ..9
      4.6. Impact on Network Operation ................................9
   5. Security Considerations .........................................9
   6. References .....................................................10
      6.1. Normative References ......................................10
      6.2. Informative References ....................................10
   Acknowledgments....................................................11
   Authors' Addresses.................................................11