RFC 4257 on Framework for Generalized Multi-Protocol Label Switching (GMPLS)-based Control of Synchronous Digital Hierarchy/Synchronous Optical Networking (SDH/SONET) Networks

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        RFC 4257

        Title:      Framework for Generalized Multi-Protocol Label
                    Switching (GMPLS)-based Control of Synchronous
                    Digital Hierarchy/Synchronous Optical Networking
                    (SDH/SONET) Networks
        Author(s):  G. Bernstein, E. Mannie, V. Sharma, E. Gray
        Status:     Informational
        Date:       December 2005
        Mailbox:    [e-mail],
                    [e-mail], [e-mail],
                    [e-mail]
        Pages:      35
        Characters: 86974
        Updates/Obsoletes/SeeAlso:    None

        I-D Tag:    draft-ietf-ccamp-sdhsonet-control-05.txt

        URL:        ftp://ftp.rfc-editor.org/in-notes/rfc4257.txt


Generalized Multi-Protocol Label Switching (GMPLS) is a suite of
protocol extensions to MPLS to make it generally applicable, to
include, for example, control of non packet-based switching, and
particularly, optical switching.  One consideration is to use GMPLS
protocols to upgrade the control plane of optical transport networks.
This document illustrates this process by describing those extensions
to GMPLS protocols that are aimed at controlling Synchronous Digital
Hierarchy (SDH) or Synchronous Optical Networking (SONET) networks.
SDH/SONET networks make good examples of this process for a variety of
reasons.  This document highlights extensions to GMPLS-related routing
protocols to disseminate information needed in transport path
computation and network operations, together with (G)MPLS protocol
extensions required for the provisioning of transport circuits.  New
capabilities that an GMPLS control plane would bring to SDH/SONET
networks, such as new restoration methods and multi-layer circuit
establishment, are also discussed.

This document is a product of the Common Control and Measurement Plane
Working Group of the IETF.

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Joyce K. Reynolds and Sandy Ginoza
USC/Information Sciences Institute

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