Generalized Multi-Protocol Label Switching (GMPLS) Architecture
RFC 3945
| Document | Type |
RFC - Proposed Standard
(November 2004; Errata)
Updated by RFC 6002
|
|
|---|---|---|---|
| Last updated | 2013-03-02 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 3945 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Bert Wijnen | ||
| Send notices to | <ronald.p.bonica@mci.com>, <kireeti@juniper.net> | ||
Network Working Group E. Mannie, Ed.
Request for Comments: 3945 October 2004
Category: Standards Track
Generalized Multi-Protocol Label Switching (GMPLS) Architecture
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 of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2004).
Abstract
Future data and transmission networks will consist of elements such
as routers, switches, Dense Wavelength Division Multiplexing (DWDM)
systems, Add-Drop Multiplexors (ADMs), photonic cross-connects
(PXCs), optical cross-connects (OXCs), etc. that will use Generalized
Multi-Protocol Label Switching (GMPLS) to dynamically provision
resources and to provide network survivability using protection and
restoration techniques.
This document describes the architecture of GMPLS. GMPLS extends
MPLS to encompass time-division (e.g., SONET/SDH, PDH, G.709),
wavelength (lambdas), and spatial switching (e.g., incoming port or
fiber to outgoing port or fiber). The focus of GMPLS is on the
control plane of these various layers since each of them can use
physically diverse data or forwarding planes. The intention is to
cover both the signaling and the routing part of that control plane.
Mannie Standards Track [Page 1]
RFC 3945 GMPLS Architecture October 2004
Table of Contents
1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1. Acronyms & Abbreviations. . . . . . . . . . . . . . . . 4
1.2. Multiple Types of Switching and Forwarding Hierarchies. 5
1.3. Extension of the MPLS Control Plane . . . . . . . . . . 7
1.4. GMPLS Key Extensions to MPLS-TE . . . . . . . . . . . . 10
2. Routing and Addressing Model. . . . . . . . . . . . . . . . . 11
2.1. Addressing of PSC and non-PSC layers. . . . . . . . . . 13
2.2. GMPLS Scalability Enhancements. . . . . . . . . . . . . 13
2.3. TE Extensions to IP Routing Protocols . . . . . . . . . 14
3. Unnumbered Links. . . . . . . . . . . . . . . . . . . . . . . 15
3.1. Unnumbered Forwarding Adjacencies . . . . . . . . . . . 16
4. Link Bundling . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1. Restrictions on Bundling. . . . . . . . . . . . . . . . 17
4.2. Routing Considerations for Bundling . . . . . . . . . . 17
4.3. Signaling Considerations. . . . . . . . . . . . . . . . 18
4.3.1. Mechanism 1: Implicit Indication. . . . . . . . 18
4.3.2. Mechanism 2: Explicit Indication by Numbered
Interface ID. . . . . . . . . . . . . . . . . . 19
4.3.3. Mechanism 3: Explicit Indication by Unnumbered
Interface ID. . . . . . . . . . . . . . . . . . 19
4.4. Unnumbered Bundled Link . . . . . . . . . . . . . . . . 19
4.5. Forming Bundled Links . . . . . . . . . . . . . . . . . 20
5. Relationship with the UNI . . . . . . . . . . . . . . . . . . 20
5.1. Relationship with the OIF UNI . . . . . . . . . . . . . 21
5.2. Reachability across the UNI . . . . . . . . . . . . . . 21
6. Link Management . . . . . . . . . . . . . . . . . . . . . . . 22
6.1. Control Channel and Control Channel Management. . . . . 23
6.2. Link Property Correlation . . . . . . . . . . . . . . . 24
6.3. Link Connectivity Verification. . . . . . . . . . . . . 24
6.4. Fault Management. . . . . . . . . . . . . . . . . . . . 25
6.5. LMP for DWDM Optical Line Systems (OLSs). . . . . . . . 26
7. Generalized Signaling . . . . . . . . . . . . . . . . . . . . 27
7.1. Overview: How to Request an LSP . . . . . . . . . . . . 29
7.2. Generalized Label Request . . . . . . . . . . . . . . . 30
7.3. SONET/SDH Traffic Parameters. . . . . . . . . . . . . . 31
7.4. G.709 Traffic Parameters. . . . . . . . . . . . . . . . 32
7.5. Bandwidth Encoding. . . . . . . . . . . . . . . . . . . 33
7.6. Generalized Label . . . . . . . . . . . . . . . . . . . 34
7.7. Waveband Switching. . . . . . . . . . . . . . . . . . . 34
7.8. Label Suggestion by the Upstream. . . . . . . . . . . . 35
7.9. Label Restriction by the Upstream . . . . . . . . . . . 35
7.10. Bi-directional LSP. . . . . . . . . . . . . . . . . . . 36
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