Generalized Multi-Protocol Label Switching (GMPLS) Extensions for Synchronous Optical Network (SONET) and Synchronous Digital Hierarchy (SDH) Control
RFC 3946

Network Working Group                                          E. Mannie
Request for Comments: 3946                                    Consultant
Category: Standards Track                               D. Papadimitriou
                                                                 Alcatel
                                                            October 2004

   Generalized Multi-Protocol Label Switching (GMPLS) Extensions for
                Synchronous Optical Network (SONET) and
              Synchronous Digital Hierarchy (SDH) 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 (2004).

Abstract

   This document is a companion to the Generalized Multi-Protocol Label
   Switching (GMPLS) signaling.  It defines the Synchronous Optical
   Network (SONET)/Synchronous Digital Hierarchy (SDH) technology
   specific information needed when using GMPLS signaling.

Table of Contents

   1.  Introduction .................................................  2
   2.  SONET and SDH Traffic Parameters .............................  2
       2.1.  SONET/SDH Traffic Parameters ...........................  3
       2.2.  RSVP-TE Details ........................................  9
       2.3.  CR-LDP Details .........................................  9
   3.  SONET and SDH Labels ......................................... 10
   4.  Acknowledgments .............................................. 15
   5.  Security Considerations ...................................... 16
   6.  IANA Considerations .......................................... 16
   7.  References ................................................... 16
       7.1.  Normative References ................................... 16
   Appendix 1 - Signal Type Values Extension for VC-3 ............... 18
   Annex 1 - Examples ............................................... 18
   Contributors ..................................................... 21
   Authors' Addresses ............................................... 25
   Full Copyright Statement ......................................... 26

Mannie & Papadimitriou      Standards Track                     [Page 1]
RFC 3946         GMPLS Extensions for SONET/SDH Control     October 2004

1.  Introduction

   As described in [RFC3945], Generalized MPLS (GMPLS) extends MPLS from
   supporting packet (Packet Switching Capable - PSC) interfaces and
   switching to include support of four new classes of interfaces and
   switching: Layer-2 Switch Capable (L2SC), Time-Division Multiplex
   (TDM), Lambda Switch Capable (LSC) and Fiber-Switch Capable (FSC).  A
   functional description of the extensions to MPLS signaling needed to
   support the new classes of interfaces and switching is provided in
   [RFC3471].  [RFC3473] describes RSVP-TE specific formats and
   mechanisms needed to support all five classes of interfaces, and CR-
   LDP extensions can be found in [RFC3472].  This document presents
   details that are specific to Synchronous Optical Network
   (SONET)/Synchronous Digital Hierarchy (SDH).  Per [RFC3471],
   SONET/SDH specific parameters are carried in the signaling protocol
   in traffic parameter specific objects.

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

   Moreover, the reader is assumed to be familiar with the terminology
   in ANSI [T1.105], ITU-T [G.707] as well as [RFC3471], [RFC3472], and
   [RFC3473].  The following abbreviations are used in this document:

   DCC: Data Communications Channel.
   LOVC: Lower Order Virtual Container
   HOVC: Higher Order Virtual Container
   MS: Multiplex Section.
   MSOH: Multiplex Section overhead.
   POH: Path overhead.
   RS: Regenerator Section.
   RSOH: Regenerator section overhead.
   SDH: Synchronous digital hierarchy.
   SOH: Section overhead.
   SONET: Synchronous Optical Network.
   SPE: Synchronous Payload Envelope.
   STM(-N): Synchronous Transport Module (-N) (SDH).
   STS(-N): Synchronous Transport Signal-Level N (SONET).
   VC-n: Virtual Container-n (SDH).
   VTn: Virtual Tributary-n (SONET).

2.  SONET and SDH Traffic Parameters

   This section defines the GMPLS traffic parameters for SONET/SDH.  The