GMPLS Routing and Signalling Framework for ODUCn
draft-wang-ccamp-oducn-fwk-00

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Internet Engineering Task Force                             Q. Wang, Ed.
Internet-Draft                                                  Y. Zhang
Intended status: Informational                                       ZTE
Expires: May 4, 2017                                    October 31, 2016

            GMPLS Routing and Signalling Framework for ODUCn
                     draft-wang-ccamp-oducn-fwk-00

Abstract

   This document provides a framework to address the GMPLS routing and
   signalling issues to support Generalized Multi-Protocol Label
   Switching (GMPLS)control of Optical Transport Networks (OTNs) as
   specified in ITU-T Recommendation G.709 as published in 2016.

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Wang & Zhang               Expires May 4, 2017                  [Page 1]
Internet-Draft            GMPLS ODUCn Framework             October 2016

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  G.709 Optical Transport Network . . . . . . . . . . . . . . .   3
     3.1.  OTN ODUCn layer network . . . . . . . . . . . . . . . . .   3
     3.2.  Time Slot Granularity . . . . . . . . . . . . . . . . . .   4
     3.3.  Structure of MSI Information  . . . . . . . . . . . . . .   5
     3.4.  OTUCn sub rates (OTUCn-M) . . . . . . . . . . . . . . . .   6
   4.  Connection Management of ODUCn  . . . . . . . . . . . . . . .   6
   5.  GMPLS Implications  . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  Implications for GMPLS Signalling . . . . . . . . . . . .   6
     5.2.  Implications for GMPLS Routing  . . . . . . . . . . . . .   7
     5.3.  Implications for Control-Plane Backward Compatibility . .   7
   6.  Solutions . . . . . . . . . . . . . . . . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   Currently, Optical Transport Networks (OTNs) is widely used in the
   transport network.  Some operators already use control-plane
   capabilities based on GMPLS to control optical transport network to
   improve the network management efficiency.

   The GMPLS signalling extensions defined in [RFC4328] provide the
   mechanisms for basic GMPLS control of OTN based on the 2001 revision
   of the G.709 specification.  The 2012 revision of the G.709
   specification, [G709-2012], introduce some new features, and the
   GMPLS control of OTN based on the 2012 revision of the G.709
   specification is covered in [RFC7062], [RFC7096], [RFC7138] and
   [RFC7139].  The 2016 revision of the G.709 specification includes
   some new features, such as OTUCn, ODUCn and OPUCn.  The OTUCn
   contains an optical data unit (ODUCn) and the ODUCn contains an
   optical payload unit (OPUCn).  OTUCn, ODUCn and OPUCn are presented
   in an interface independent manner, by means of n OTUC, ODUC and OPUC
   instances that are marked #1 to #n through inverse multiplexing.
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