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