Generalized Multi-Protocol Label Switching (GMPLS) Architecture
RFC 3945
Document | Type |
RFC - Proposed Standard
(November 2004; Errata)
Updated by RFC 6002
|
|
---|---|---|---|
Author | Eric Mannie | ||
Last updated | 2020-01-21 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized with errata bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 3945 (Proposed Standard) | |
Action Holders |
(None)
|
||
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 7.11. Bi-directional LSP Contention Resolution. . . . . . . . 37 7.12. Rapid Notification of Failure . . . . . . . . . . . . . 37Show full document text