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OSPF-TE Extensions for General Network Element Constraints (RFC7580)

IP.com Disclosure Number: IPCOM000242217D
Original Publication Date: 2015-Jun-01
Included in the Prior Art Database: 2015-Jun-26
Document File: 24 page(s) / 25K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

F. Zhang: AUTHOR [+5]


Some data-plane technologies that require the use of a GMPLS control plane impose additional constraints on switching capability and label assignment. In addition, some of these technologies should be capable of performing 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)                          F. Zhang Request for Comments: 7580                                        Y. Lee Category: Standards Track                                         J. Han ISSN: 2070-1721                                                   Huawei                                                             G. Bernstein                                                        Grotto Networking                                                                    Y. Xu                                                                     CATR                                                                June 2015

        OSPF-TE Extensions for General Network Element Constraints


   Generalized Multiprotocol Label Switching (GMPLS) can be used to    control a wide variety of technologies including packet switching    (e.g., MPLS), time division (e.g., Synchronous Optical Network /    Synchronous Digital Hierarchy (SONET/SDH) and Optical Transport    Network (OTN)), wavelength (lambdas), and spatial switching (e.g.,    incoming port or fiber to outgoing port or fiber).  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 describes Open Shortest Path First (OSPF) routing protocol    extensions to support these kinds of constraints under the control of    GMPLS.

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    http://www.rfc-editor.org/info/rfc7580.

 Zhang, et al.                Standards Track                    [Page 1]
 RFC 7580               Generic Constraint OSPF-TE              June 2015

 Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is sub...