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General Network Element Constraint Encoding for GMPLS-Controlled Networks (RFC7579) Disclosure Number: IPCOM000242216D
Original Publication Date: 2015-Jun-01
Included in the Prior Art Database: 2015-Jun-26
Document File: 56 page(s) / 62K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

G. Bernstein: AUTHOR [+6]


Some data-plane technologies that wish to make use of a GMPLS control plane contain additional constraints on switching capability and label assignment. In addition, some of these technologies must perform non-local label assignment based on the nature of the technology, e.g., wavelength continuity constraint in Wavelength Switched Optical Networks (WSONs) [RFC6163]. Such constraints can lead to the requirement for link-by-link label availability in path computation and label assignment.

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Internet Engineering Task Force (IETF)                 G. Bernstein, Ed. Request for Comments: 7579                             Grotto Networking Category: Standards Track                                    Y. Lee, Ed. ISSN: 2070-1721                                                    D. Li                                                                   Huawei                                                               W. Imajuku                                                                      NTT                                                                   J. Han                                                                   Huawei                                                                June 2015

               General Network Element Constraint Encoding                      for GMPLS-Controlled Networks


   Generalized Multiprotocol Label Switching (GMPLS) can be used to    control a wide variety of technologies.  In some of these    technologies, network elements and links may impose additional    routing constraints such as asymmetric switch connectivity, non-local    label assignment, and label range limitations on links.

   This document provides efficient, protocol-agnostic encodings for    general information elements representing connectivity and label    constraints as well as label availability.  It is intended that    protocol-specific documents will reference this memo to describe how    information is carried for specific uses.

Status of This Memo

   This is an Internet Standards Track document.

   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).  Further information on    Internet Standards is available in 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

Bernstein, et al.            Standards Track                    [Page 1]
 RFC 7579       General Network Element Constraint Encoding     June 2015

 Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the    document authors.  Al...