GMPLS OSPF Enhancement for Signal and Network Element Compatibility for Wavelength Switched Optical Networks
RFC 7688

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Internet Engineering Task Force (IETF)                       Y. Lee, Ed.
Request for Comments: 7688                                        Huawei
Category: Standards Track                              G. Bernstein, Ed.
ISSN: 2070-1721                                        Grotto Networking
                                                           November 2015

  GMPLS OSPF Enhancement for Signal and Network Element Compatibility
                for Wavelength Switched Optical Networks

Abstract

   This document provides Generalized Multiprotocol Label Switching
   (GMPLS) Open Shortest Path First (OSPF) routing enhancements to
   support signal compatibility constraints associated with Wavelength
   Switched Optical Network (WSON) elements.  These routing enhancements
   are applicable in common optical or hybrid electro-optical networks
   where not all the optical signals in the network are compatible with
   all network elements participating in the network.

   This compatibility constraint model is applicable to common optical
   or hybrid electro-optical systems such as optical-electronic-optical
   (OEO) switches, regenerators, and wavelength converters, since such
   systems can be limited to processing only certain types of WSON
   signals.

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/rfc7688.

Lee & Bernstein              Standards Track                    [Page 1]
RFC 7688                OSPF Enhancement for WSON          November 2015

Copyright Notice

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

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1. Introduction ....................................................3
      1.1. Conventions Used in This Document ..........................3
   2. The Optical Node Property TLV ...................................3
      2.1. Resource Block Information .................................4
      2.2. Resource Accessibility .....................................5
      2.3. Resource Wavelength Constraints ............................5
      2.4. Resource Block Pool State ..................................5
      2.5. Resource Block Shared Access Wavelength Availability .......5
   3. Interface Switching Capability Descriptor (ISCD) Format
      Extensions ......................................................5
      3.1. Switching Capability Specific Information (SCSI) ...........6
   4. WSON-Specific Scalability and Timeliness ........................7
   5. Security Considerations .........................................8
   6. IANA Considerations .............................................8
      6.1. Optical Node Property TLV ..................................8
           6.1.1. Optical Node Property Sub-TLV .......................8
      6.2. WSON-LSC Switching Type TLV ................................9
           6.2.1. WSON-LSC SCSI Sub-TLVs ..............................9
   7. References .....................................................10
      7.1. Normative References ......................................10
      7.2. Informative References ....................................10
   Authors' Addresses ................................................12

Lee & Bernstein              Standards Track                    [Page 2]
RFC 7688                OSPF Enhancement for WSON          November 2015

1.  Introduction

   The documents [RFC6163], [RFC7446], and [RFC7581] explain how to
   extend the Wavelength Switched Optical Network (WSON) control plane
   to support both multiple WSON signal types and common hybrid electro-
   optical systems as well hybrid systems containing optical switching
   and electro-optical resources.  In WSON, not all the optical signals
   in the network are compatible with all network elements participating
   in the network.  Therefore, signal compatibility is an important