rfc3272 - Network Working Group D Awduche Request for...

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Unformatted text preview: Network Working Group D. Awduche Request for Comments: 3272 Movaz Networks Category: Informational A. Chiu Celion Networks A. Elwalid I. Widjaja Lucent Technologies X. Xiao Redback Networks May 2002 Overview and Principles of Internet Traffic Engineering 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 (2002). All Rights Reserved. Abstract This memo describes the principles of Traffic Engineering (TE) in the Internet. The document is intended to promote better understanding of the issues surrounding traffic engineering in IP networks, and to provide a common basis for the development of traffic engineering capabilities for the Internet. The principles, architectures, and methodologies for performance evaluation and performance optimization of operational IP networks are discussed throughout this document. Table of Contents 1.0 Introduction...................................................3 1.1 What is Internet Traffic Engineering?.......................4 1.2 Scope.......................................................7 1.3 Terminology.................................................8 2.0 Background....................................................11 2.1 Context of Internet Traffic Engineering....................12 2.2 Network Context............................................13 2.3 Problem Context............................................14 2.3.1 Congestion and its Ramifications......................16 2.4 Solution Context...........................................16 2.4.1 Combating the Congestion Problem......................18 2.5 Implementation and Operational Context.....................21 Awduche, et. al. Informational [Page 1] RFC 3272 Overview and Principles of Internet TE May 2002 3.0 Traffic Engineering Process Model.............................21 3.1 Components of the Traffic Engineering Process Model........23 3.2 Measurement................................................23 3.3 Modeling, Analysis, and Simulation.........................24 3.4 Optimization...............................................25 4.0 Historical Review and Recent Developments.....................26 4.1 Traffic Engineering in Classical Telephone Networks........26 4.2 Evolution of Traffic Engineering in the Internet...........28 4.2.1 Adaptive Routing in ARPANET...........................28 4.2.2 Dynamic Routing in the Internet.......................29 4.2.3 ToS Routing...........................................30 4.2.4 Equal Cost Multi-Path.................................30 4.2.5 Nimrod................................................31 4.3 Overlay Model..............................................31 4.4 Constraint-Based Routing...................................32 4.5 Overview of Other IETF Projects Related to Traffic Engineering................................................32 4.5.1 Integrated Services...................................324....
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rfc3272 - Network Working Group D Awduche Request for...

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