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Evaluation of Existing GMPLS Encoding against G.709v3 Optical Transport Networks (OTNs)
RFC 7096

Internet Engineering Task Force (IETF)                   S. Belotti, Ed.
Request for Comments: 7096                                     P. Grandi
Category: Informational                                   Alcatel-Lucent
ISSN: 2070-1721                                       D. Ceccarelli, Ed.
                                                             D. Caviglia
                                                                Ericsson
                                                                F. Zhang
                                                                   D. Li
                                                     Huawei Technologies
                                                            January 2014

                 Evaluation of Existing GMPLS Encoding
           against G.709v3 Optical Transport Networks (OTNs)

Abstract

   ITU-T recommendation G.709-2012 has introduced new fixed and flexible
   Optical channel Data Unit (ODU) containers in Optical Transport
   Networks (OTNs).

   This document provides an evaluation of existing Generalized
   Multiprotocol Label Switching (GMPLS) routing and signaling protocols
   against the G.709 OTNs.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   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.

   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/rfc7096.

Belotti, et al.               Informational                     [Page 1]
RFC 7096          GMPLS Evaluation against G.709v3 OTNs     January 2014

Copyright Notice

   Copyright (c) 2014 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
   2. G.709 Mapping and Multiplexing Capabilities .....................4
   3. Tributary Slot Granularity ......................................6
      3.1. Data-Plane Considerations ..................................7
           3.1.1. Payload Type and TS Granularity Relationship ........7
           3.1.2. Fallback Procedure ..................................8
      3.2. Control-Plane Considerations ...............................9
   4. Tributary Port Number ..........................................13
   5. Signal Type ....................................................13
   6. Bit Rate and Tolerance .........................................15
   7. Unreserved Resources ...........................................15
   8. Maximum LSP Bandwidth ..........................................15
   9. Distinction between Terminating and Switching Capabilities .....16
   10. Priority Support ..............................................18
   11. Multi-stage Multiplexing ......................................18
   12. Generalized Label .............................................19
   13. Security Considerations .......................................19
   14. Contributors ..................................................20
   15. Acknowledgements ..............................................20
   16. References ....................................................20
      16.1. Normative References .....................................20
      16.2. Informative References ...................................21

Belotti, et al.               Informational                     [Page 2]
RFC 7096          GMPLS Evaluation against G.709v3 OTNs     January 2014

1.  Introduction

   GMPLS routing [RFC4203] [RFC5307] and signaling [RFC3473] [RFC4328]
   provide the mechanisms for basic GMPLS control of Optical Transport
   Networks (OTNs) based on the 2001 revision of the G.709 specification
   [G.709-2001].  The 2012 revision of the G.709 specification

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