OSPFv2 Routing Protocols Extensions for Automatically Switched Optical Network (ASON) Routing
RFC 5787

Internet Engineering Task Force (IETF)                  D. Papadimitriou
Request for Comments: 5787                                Alcatel-Lucent
Category: Experimental                                        March 2010
ISSN: 2070-1721

                OSPFv2 Routing Protocols Extensions for
         Automatically Switched Optical Network (ASON) Routing

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 including optical networks such as time division
   multiplexing (TDM) networks including SONET/SDH and 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
   current when those documents were written.  Future extensions of
   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.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for examination, experimental implementation, and
   evaluation.

   This document defines an Experimental Protocol for the Internet
   community.  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.

Papdimitriou                  Experimental                      [Page 1]
RFC 5787            ASON Routing for OSPFv2 Protocols         March 2010

   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/rfc5787.

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   document authors.  All rights reserved.

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   described in the Simplified BSD License.

Papdimitriou                  Experimental                      [Page 2]
RFC 5787            ASON Routing for OSPFv2 Protocols         March 2010

Table of Contents

   1. Introduction ....................................................4
      1.1. Conventions Used in This Document ..........................5
   2. Routing Areas, OSPF Areas, and Protocol Instances ...............5
   3. Reachability ....................................................6
      3.1. Node IPv4 Local Prefix Sub-TLV .............................6
      3.2. Node IPv6 Local Prefix Sub-TLV .............................7
   4. Link Attribute ..................................................8
      4.1. Local Adaptation ...........................................8
      4.2. Bandwidth Accounting .......................................9
   5. Routing Information Scope .......................................9
      5.1. Terminology and Identification .............................9
      5.2. Link Advertisement (Local and Remote TE Router ID
           Sub-TLV) ..................................................10
      5.3. Reachability Advertisement (Local TE Router ID sub-TLV) ...11
   6. Routing Information Dissemination ..............................12
      6.1. Import/Export Rules .......................................13
      6.2. Discovery and Selection ...................................13
           6.2.1. Upward Discovery and Selection .....................13
           6.2.2. Downward Discovery and Selection ...................14
           6.2.3. Router Information Experimental Capabilities TLV ...16
      6.3. Loop Prevention ...........................................16