Generalized Multi-Protocol Label Switching (GMPLS) Signaling Extensions for G.709 Optical Transport Networks Control
RFC 4328

Network Working Group                              D. Papadimitriou, Ed.
Request for Comments: 4328                                       Alcatel
Updates: 3471                                               January 2006
Category: Standards Track

           Generalized Multi-Protocol Label Switching (GMPLS)
   Signaling Extensions for G.709 Optical Transport Networks Control

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2006).

Abstract

   This document is a companion to the Generalized Multi-Protocol Label
   Switching (GMPLS) signaling documents.  It describes the technology-
   specific information needed to extend GMPLS signaling to control
   Optical Transport Networks (OTN); it also includes the so-called
   pre-OTN developments.

Table of Contents

   1. Introduction ....................................................2
      1.1. Conventions Used in This Document ..........................3
   2. GMPLS Extensions for G.709 - Overview ...........................3
   3. Generalized Label Request .......................................4
      3.1. Common Part ................................................5
           3.1.1. LSP Encoding Type ...................................5
           3.1.2. Switching Type ......................................6
           3.1.3. Generalized-PID (G-PID) .............................6
      3.2. G.709 Traffic Parameters ...................................8
           3.2.1. Signal Type (ST) ....................................8
           3.2.2. Number of Multiplexed Components (NMC) ..............9
           3.2.3. Number of Virtual Components (NVC) .................10
           3.2.4. Multiplier (MT) ....................................10
           3.2.5. Reserved Fields ....................................10
   4. Generalized Label ..............................................10
      4.1. ODUk Label Space ..........................................11
      4.2. Label Distribution Rules ..................................13

Papadimitriou               Standards Track                     [Page 1]
RFC 4328          GMPLS Signaling Extensions for G.709      January 2006

      4.3. Optical Channel Label Space ...............................14
   5. Examples .......................................................14
   6. RSVP-TE Signaling Protocol Extensions ..........................16
   7. Security Considerations ........................................16
   8. IANA Considerations ............................................16
   9. Acknowledgements ...............................................18
   10. References ....................................................18
      10.1. Normative References .....................................18
      10.2. Informative References ...................................19
   11. Contributors ..................................................19
   Appendix A. Abbreviations .........................................21
   Appendix B. G.709 Indexes .........................................22

1.  Introduction

   Generalized Multi-Protocol Label Switching (GMPLS) [RFC3945] extends
   MPLS from supporting Packet Switching Capable (PSC) interfaces and
   switching to include support of four new classes of interfaces and
   switching: Layer-2 Switching (L2SC), Time-Division Multiplex (TDM),
   Lambda Switch (LSC), and Fiber-Switch (FSC) Capable.  A functional
   description of the extensions to MPLS signaling that are needed to
   support these new classes of interfaces and switching is provided in
   [RFC3471].  [RFC3473] describes the RSVP-TE-specific formats and
   mechanisms needed to support all four classes of interfaces.

   This document presents the technology details that are specific to
   G.709 Optical Transport Networks (OTN) as specified in the ITU-T
   G.709 recommendation [ITUT-G709] (and referenced documents),
   including pre-OTN developments.  Per [RFC3471], G.709 technology-
   specific parameters are carried through the signaling protocol in
   dedicated traffic parameter objects.

   The G.709 traffic parameters defined hereafter (see Section 3.2) MUST
   be used when the label is encoded as defined in this document.
   Moreover, the label MUST be encoded as defined in Section 4 when
   these G.709 traffic parameters are used.

   In the context of this memo, by pre-OTN developments, one refers to
   Optical Channel, Digital Wrapper and Forward Error Correction (FEC)