Recovery (Protection and Restoration) Terminology for Generalized Multi-Protocol Label Switching (GMPLS)
RFC 4427
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RFC - Informational
(March 2006; Errata)
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Last updated |
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2013-03-02
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IETF
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bibtex
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(None)
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No shepherd assigned
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IESG state |
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RFC 4427 (Informational)
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Responsible AD |
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Alex Zinin
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kireeti@juniper.net, adrian@olddog.co.uk
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Network Working Group E. Mannie, Ed.
Request for Comments: 4427 Perceval
Category: Informational D. Papadimitriou, Ed.
Alcatel
March 2006
Recovery (Protection and Restoration) Terminology
for Generalized Multi-Protocol Label Switching (GMPLS)
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 (2006).
Abstract
This document defines a common terminology for Generalized Multi-
Protocol Label Switching (GMPLS)-based recovery mechanisms (i.e.,
protection and restoration). The terminology is independent of the
underlying transport technologies covered by GMPLS.
Mannie & Papadimitriou Informational [Page 1]
RFC 4427 GMPLS Recovery Terminology March 2006
Table of Contents
1. Introduction ....................................................3
2. Contributors ....................................................4
3. Conventions Used in this Document ...............................5
4. Recovery Terminology Common to Protection and Restoration .......5
4.1. Working and Recovery LSP/Span ..............................6
4.2. Traffic Types ..............................................6
4.3. LSP/Span Protection and Restoration ........................6
4.4. Recovery Scope .............................................7
4.5. Recovery Domain ............................................8
4.6. Recovery Types .............................................8
4.7. Bridge Types ..............................................10
4.8. Selector Types ............................................10
4.9. Recovery GMPLS Nodes ......................................11
4.10. Switch-over Mechanism ....................................11
4.11. Reversion operations .....................................11
4.12. Failure Reporting ........................................12
4.13. External commands ........................................12
4.14. Unidirectional versus Bi-Directional Recovery Switching ..13
4.15. Full versus Partial Span Recovery Switching ..............14
4.16. Recovery Schemes Related Time and Durations ..............14
4.17. Impairment ...............................................15
4.18. Recovery Ratio ...........................................15
4.19. Hitless Protection Switch-over ...........................15
4.20. Network Survivability ....................................15
4.21. Survivable Network .......................................16
4.22. Escalation ...............................................16
5. Recovery Phases ................................................16
5.1. Entities Involved During Recovery .........................17
6. Protection Schemes .............................................17
6.1. 1+1 Protection ............................................18
6.2. 1:N (N >= 1) Protection ...................................18
6.3. M:N (M, N > 1, N >= M) Protection .........................18
6.4. Notes on Protection Schemes ...............................19
7. Restoration Schemes ............................................19
7.1. Pre-Planned LSP Restoration ...............................19
7.1.1. Shared-Mesh Restoration ............................19
7.2. LSP Restoration ...........................................20
7.2.1. Hard LSP Restoration ...............................20
7.2.2. Soft LSP Restoration ...............................20
8. Security Considerations ........................................20
9. References .....................................................20
9.1. Normative References ......................................20
9.2. Informative References ....................................20
10. Acknowledgements ..............................................21
Mannie & Papadimitriou Informational [Page 2]
RFC 4427 GMPLS Recovery Terminology March 2006
1. Introduction
This document defines a common terminology for Generalized Multi-
Protocol Label Switching (GMPLS)-based recovery mechanisms (i.e.,
protection and restoration).
The terminology proposed in this document is independent of the
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