Automatically Switched Optical Network (ASON) Routing for OSPFv2 Protocols
RFC 6827

Internet Engineering Task Force (IETF)                     A. Malis, Ed.
Request for Comments: 6827                        Verizon Communications
Obsoletes: 5787                                           A. Lindem, Ed.
Updates: 5786                                                   Ericsson
Category: Standards Track                          D. Papadimitriou, Ed.
ISSN: 2070-1721                                           Alcatel-Lucent
                                                            January 2013

             Automatically Switched Optical Network (ASON)
                      Routing for OSPFv2 Protocols

Abstract

   The ITU-T has defined an architecture and requirements for operating
   an Automatically Switched Optical Network (ASON).

   The Generalized Multiprotocol Label Switching (GMPLS) protocol suite
   is designed to provide a control plane for a range of network
   technologies.  These include optical networks such as time division
   multiplexing (TDM) networks including the Synchronous Optical
   Network/Synchronous Digital Hierarchy (SONET/SDH), Optical Transport
   Networks (OTNs), and lambda switching optical networks.

   The requirements for GMPLS routing to satisfy the requirements of
   ASON routing and an evaluation of existing GMPLS routing protocols
   are provided in other documents.  This document defines extensions to
   the OSPFv2 Link State Routing Protocol to meet the requirements for
   routing in an ASON.

   Note that this work is scoped to the requirements and evaluation
   expressed in RFC 4258 and RFC 4652 and the ITU-T Recommendations that
   were current when those documents were written.  Future extensions or
   revisions of this work may be necessary if the ITU-T Recommendations
   are revised or if new requirements are introduced into a revision of
   RFC 4258.  This document obsoletes RFC 5787 and updates RFC 5786.

Malis, et al.                Standards Track                    [Page 1]
RFC 6827            ASON Routing for OSPFv2 Protocols       January 2013

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/rfc6827.

Copyright Notice

   Copyright (c) 2013 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
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Malis, et al.                Standards Track                    [Page 2]
RFC 6827            ASON Routing for OSPFv2 Protocols       January 2013

Table of Contents

   1. Introduction ....................................................4
      1.1. Conventions Used in This Document ..........................5
   2. Routing Areas, OSPF Areas, and Protocol Instances ...............5
   3. Terminology and Identification ..................................6
   4. Reachability ....................................................7
   5. Link Attribute ..................................................8
      5.1. Local Adaptation ...........................................8
      5.2. Bandwidth Accounting .......................................9
   6. Routing Information Scope .......................................9
      6.1. Link Advertisement (Local and Remote TE Router ID Sub-TLV) .9
      6.2. Reachability Advertisement (Local TE Router ID Sub-TLV) ...11
   7. Routing Information Dissemination ..............................11
      7.1. Import/Export Rules .......................................12
      7.2. Loop Prevention ...........................................12
           7.2.1. Inter-RA Export Upward/Downward Sub-TLVs ...........13
           7.2.2. Inter-RA Export Upward/Downward Sub-TLV Processing .13
   8. OSPFv2 Scalability .............................................14
   9. Security Considerations ........................................15