Generalized Multi-Protocol Label Switching (GMPLS) Extensions for Synchronous Optical Network (SONET) and Synchronous Digital Hierarchy (SDH) Control
RFC 4606

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Network Working Group                                          E. Mannie
Request for Comments: 4606                                      Perceval
Obsoletes: 3946                                         D. Papadimitriou
Category: Standards Track                                        Alcatel
                                                             August 2006

   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 cof this memo is
   unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2006).

Abstract

   This document provides minor clarification to RFC 3946.

   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 GMPLS signaling is used.

Table of Contents

   1. Introduction ....................................................2
   2. SONET and SDH Traffic Parameters ................................3
      2.1. SONET/SDH Traffic Parameters ...............................3
      2.2. RSVP-TE Details ............................................9
      2.3. CR-LDP Details ............................................10
   3. SONET and SDH Labels ...........................................11
   4. Acknowledgements ...............................................16
   5. Security Considerations ........................................16
   6. IANA Considerations ............................................16
   Contributors ......................................................17
   Appendix 1. Signal Type Values Extension for VC-3 .................20
   Annex 1. Examples .................................................20
   Normative References ..............................................23

Mannie & Papadimitriou      Standards Track                     [Page 1]
RFC 4606        GMPLS Extensions for SONET & SDH Control     August 2006

1.  Introduction

   As described in [RFC3945], Generalized MPLS (GMPLS) extends MPLS from
   supporting packet (Packet Switching Capable, or 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 American National Standards Institute (ANSI) [T1.105] and ITU-T
   [G.707], as well as with that in [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).

Mannie & Papadimitriou      Standards Track                     [Page 2]
RFC 4606        GMPLS Extensions for SONET & SDH Control     August 2006

2.  SONET and SDH Traffic Parameters

   This section defines the GMPLS traffic parameters for SONET/SDH.  The
   protocol-specific formats, for the SONET/SDH-specific RSVP-TE objects
   and CR-LDP TLVs, are described in Sections 2.2 and 2.3, respectively.

   These traffic parameters specify a base set of capabilities for SONET
   ANSI [T1.105] and SDH ITU-T [G.707], such as concatenation and