Overview and Principles of Internet Traffic Engineering
draft-dt-teas-rfc3272bis-02

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TEAS Working Group                                        A. Farrel, Ed.
Internet-Draft                                        Old Dog Consulting
Obsoletes: 3272 (if approved)                          November 20, 2019
Intended status: Informational
Expires: May 23, 2020

        Overview and Principles of Internet Traffic Engineering
                      draft-dt-teas-rfc3272bis-02

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.

   This work was first published as RFC 3272 in May 2002.  This document
   obsoletes RFC 3272 by making a complete update to bring the text in
   line with current best practices for Internet traffic engineering and
   to include references to the latest relevant work in the IETF.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on May 23, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Farrel                    Expires May 23, 2020                  [Page 1]
Internet-Draft   Overview and Principles of Internet TE    November 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  What is Internet Traffic Engineering? . . . . . . . . . .   4
     1.2.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . .   8
     1.3.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   8
   2.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     2.1.  Context of Internet Traffic Engineering . . . . . . . . .  12
     2.2.  Network Context . . . . . . . . . . . . . . . . . . . . .  12
     2.3.  Problem Context . . . . . . . . . . . . . . . . . . . . .  14
       2.3.1.  Congestion and its Ramifications  . . . . . . . . . .  15
     2.4.  Solution Context  . . . . . . . . . . . . . . . . . . . .  16
       2.4.1.  Combating the Congestion Problem  . . . . . . . . . .  18
     2.5.  Implementation and Operational Context  . . . . . . . . .  21
     2.6.  High-Level Objectives . . . . . . . . . . . . . . . . . .  21
   3.  Traffic Engineering Process Models  . . . . . . . . . . . . .  23
     3.1.  Components of the Traffic Engineering Process Model . . .  25
     3.2.  Measurement . . . . . . . . . . . . . . . . . . . . . . .  25
     3.3.  Modeling, Analysis, and Simulation  . . . . . . . . . . .  26
     3.4.  Optimization  . . . . . . . . . . . . . . . . . . . . . .  27
   4.  Review of TE Techniques . . . . . . . . . . . . . . . . . . .  28
     4.1.  Historic Overview . . . . . . . . . . . . . . . . . . . .  28
       4.1.1.  Traffic Engineering in Classical Telephone Networks .  28
       4.1.2.  Evolution of Traffic Engineering in Packet Networks .  30
     4.2.  Development of Internet Traffic Engineering . . . . . . .  33
       4.2.1.  Overlay Model . . . . . . . . . . . . . . . . . . . .  33
       4.2.2.  Constraint-Based Routing  . . . . . . . . . . . . . .  33
     4.3.  Overview of IETF Projects Related to Traffic Engineering   34
       4.3.1.  Integrated Services . . . . . . . . . . . . . . . . .  34
       4.3.2.  RSVP  . . . . . . . . . . . . . . . . . . . . . . . .  35
       4.3.3.  Differentiated Services . . . . . . . . . . . . . . .  36
       4.3.4.  MPLS  . . . . . . . . . . . . . . . . . . . . . . . .  37
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