Requirements for Generalized Multi-Protocol Label Switching (GMPLS) Routing for the Automatically Switched Optical Network (ASON)
RFC 4258
Document | Type | RFC - Informational (November 2005; No errata) | |
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Author | Deborah Brungard | ||
Last updated | 2018-12-20 | ||
Replaces | draft-alanqar-ccamp-gmpls-ason-routing-reqts | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 4258 (Informational) | |
Action Holders |
(None)
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||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Alex Zinin | ||
Send notices to | kireeti@juniper.net, adrian@olddog.co.uk |
Network Working Group D. Brungard, Ed. Request for Comments: 4258 ATT Category: Informational November 2005 Requirements for Generalized Multi-Protocol Label Switching (GMPLS) Routing for the Automatically Switched Optical Network (ASON) 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 The Generalized Multi-Protocol Label Switching (GMPLS) suite of protocols has been defined to control different switching technologies as well as different applications. These include support for requesting Time Division Multiplexing (TDM) connections including Synchronous Optical Network (SONET)/Synchronous Digital Hierarchy (SDH) and Optical Transport Networks (OTNs). This document concentrates on the routing requirements placed on the GMPLS suite of protocols in order to support the capabilities and functionalities of an Automatically Switched Optical Network (ASON) as defined by the ITU-T. Brungard, Ed. Informational [Page 1] RFC 4258 GMPLS Routing for ASON November 2005 Table of Contents 1. Introduction ....................................................2 2. Conventions Used in This Document ...............................4 3. ASON Routing Architecture and Requirements ......................4 3.1. Multiple Hierarchical Levels of ASON Routing Areas (RAs) ...5 3.2. Hierarchical Routing Information Dissemination .............6 3.3. Configuration ..............................................8 3.3.1. Configuring the Multi-Level Hierarchy ...............8 3.3.2. Configuring RC Adjacencies ..........................8 3.4. Evolution ..................................................8 3.5. Routing Attributes .........................................8 3.5.1. Taxonomy of Routing Attributes ......................9 3.5.2. Commonly Advertised Information .....................9 3.5.3. Node Attributes ....................................10 3.5.4. Link Attributes ....................................11 4. Security Considerations ........................................12 5. Conclusions ....................................................12 6. Contributors ...................................................15 7. Acknowledgements ...............................................15 8. References .....................................................16 8.1. Normative References ......................................16 8.2. Informative References ....................................16 1. Introduction The Generalized Multi-Protocol Label Switching (GMPLS) suite of protocols provides, among other capabilities, support for controlling different switching technologies. These include support for requesting TDM connections utilizing SONET/SDH (see [T1.105] and [G.707], respectively) as well as Optical Transport Networks (OTNs, see [G.709]). However, there are certain capabilities that are needed to support the ITU-T G.8080 control plane architecture for an Automatically Switched Optical Network (ASON). Therefore, it is desirable to understand the corresponding requirements for the GMPLS protocol suite. The ASON control plane architecture is defined in [G.8080]; ASON routing requirements are identified in [G.7715] and in [G.7715.1] for ASON link state protocols. These Recommendations apply to all [G.805] layer networks (e.g., SDH and OTN), and provide protocol-neutral functional requirements and architecture. This document focuses on the routing requirements for the GMPLS suite of protocols to support the capabilities and functionality of ASON control planes. This document summarizes the ASON requirements using ASON terminology. This document does not address GMPLS applicability or GMPLS capabilities. Any protocol (in particular, routing) Brungard, Ed. Informational [Page 2] RFC 4258 GMPLS Routing for ASON November 2005 applicability, design, or suggested extensions are strictly outside the scope of this document. ASON (Routing) terminology sections are provided in Appendixes 1 and 2. The ASON routing architecture is based on the following assumptions: - A network is subdivided based on operator decision and criteria (e.g., geography, administration, and/or technology); the network subdivisions are defined in ASON as Routing Areas (RAs). - The routing architecture and protocols applied after the networkShow full document text