Framework for Generalized Multi-Protocol Label Switching (GMPLS)-based Control of Synchronous Digital Hierarchy/Synchronous Optical Networking (SDH/SONET) Networks
RFC 4257
| Document | Type | RFC - Informational (December 2005; No errata) | |
|---|---|---|---|
| Authors | Vishal Sharma , Greg Bernstein , Eric Gray , Eric Mannie | ||
| Last updated | 2013-03-02 | ||
| Stream | Internet Engineering Task Force (IETF) | ||
| Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 4257 (Informational) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Alex Zinin | ||
| Send notices to | (None) | ||
Network Working Group G. Bernstein
Request for Comments: 4257 Grotto Networking
Category: Informational E. Mannie
Perceval
V. Sharma
Metanoia, Inc.
E. Gray
Marconi Corporation, plc
December 2005
Framework for Generalized Multi-Protocol Label
Switching (GMPLS)-based Control of Synchronous Digital
Hierarchy/Synchronous Optical Networking (SDH/SONET) Networks
Status of This Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2005).
Abstract
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.
Bernstein, et al. Informational [Page 1]
RFC 4257 GMPLS based Control of SDH/SONET December 2005
Table of Contents
1. Introduction ....................................................3
1.1. MPLS Overview ..............................................3
1.2. SDH/SONET Overview .........................................5
1.3. The Current State of Circuit Establishment in
SDH/SONET Networks .........................................7
1.3.1. Administrative Tasks ................................8
1.3.2. Manual Operations ...................................8
1.3.3. Planning Tool Operation .............................8
1.3.4. Circuit Provisioning ................................8
1.4. Centralized Approach versus Distributed Approach ...........9
1.4.1. Topology Discovery and Resource Dissemination ......10
1.4.2. Path Computation (Route Determination) .............10
1.4.3. Connection Establishment (Provisioning) ............10
1.5. Why SDH/SONET Will Not Disappear Tomorrow .................12
2. GMPLS Applied to SDH/SONET .....................................13
2.1. Controlling the SDH/SONET Multiplex .......................13
2.2. SDH/SONET LSR and LSP Terminology .........................14
3. Decomposition of the GMPLS Circuit-Switching Problem Space .....14
4. GMPLS Routing for SDH/SONET ....................................15
4.1. Switching Capabilities ....................................16
4.1.1. Switching Granularity ..............................16
4.1.2. Signal Concatenation Capabilities ..................17
4.1.3. SDH/SONET Transparency .............................19
4.2. Protection ................................................20
4.3. Available Capacity Advertisement ..........................23
4.4. Path Computation ..........................................24
5. LSP Provisioning/Signaling for SDH/SONET .......................25
5.1. What Do We Label in SDH/SONET? Frames or Circuits? .......25
5.2. Label Structure in SDH/SONET ..............................26
5.3. Signaling Elements ........................................27
6. Summary and Conclusions ........................................29
7. Security Considerations ........................................29
8. Acknowledgements ...............................................30
9. Informative References .........................................31
10. Acronyms ......................................................33
Bernstein, et al. Informational [Page 2]
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