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Internet QoS

Architectures and Mechanisms for Quality of Service

Zheng Wang

239 pages, parution le 01/03/2001

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Indisponible

Résumé

Guaranteeing performance across the Internet may seem nearlyimpossible, because of an even wider range of variables that can affect and undermine service. But if you're involved in developing and implementing streaming video or voice or other time-sensitive Internet applications, you already understand exactly what's at stake in establishing Quality of Service.

What you need is a reliable guide to the latest QoS techniques written specifically to address the Internet's special challenges. Internet QoS is it-the first book to dig deep into the issues that affect your ability to provide Internet QoS to your users. This book gives you a broad vision of the problem and dozens of specific analyses designed to help you as you strive to make, and adhere to, meaningful Quality of Service guarantees.

Features

Includes valuable insights from a Bell Labs engineer with fourteen years of experience in data networking and Internet protocol design.
Details the enhancements to current Internet architectures and new mechanisms and network management capabilities that QoS will require.
Focuses on the four main areas of Internet QoS: integrated services, differentiated services, multi-protocol label switching, and traffic engineering.

Contents

Chapter One: Introduction

1.1 Resource Allocation

1.1.1 Integrated Services
1.1.2 Differentiated Services

1.2 Performance Optimization

1.2.1 Multi-Protocol Label Switching
1.2.2 Traffic Engineering

1.3 Summary

Chapter Two: Integrated Services

2.1 Introduction
2.2 Real-Time Applications
2.3 Integrated Services Architecture

2.3.1 Basic Approach
2.3.2 Key Components

2.4 Service Models

2.4.1 Flow Specification
2.4.2 Guaranteed Service
2.4.3 Controlled Load Service

2.5 Resource Reservation Setup (RSVP)

2.5.1 Basic Features
2.5.2 Operation Overview
2.5.3 RSVP Messages
2.5.4 Reservation Styles
2.5.5 Adspec, OPWA and Slack Term

2.6 Flow Identification

2.6.1 Basic Requirements
2.6.2 Design Choices
2.6.3 Hashing-Based Schemes
2.6.4 Performance Evaluation

2.7 Packet Scheduling

2.7.1 Basic Requirements
2.7.2 Design Choices
2.7.3 Weighted Fair Queuing
2.7.4 Variants of WFQ

2.8 Integrated Services over Specific Link Layers

2.8.1 Local Area Networks
2.8.2 ATM Networks

2.9 Summary

Chapter Three: Differentiated Services

3.1 Introduction
3.2 Differentiated Services Framework

3.2.1 Basic Approach
3.2.2 Service and Forwarding Treatment
3.2.3 Per-Hop Behaviors (PHBs)
3.2.4 Services

3.3 Differentiated Services Field

3.3.1 Structure of DS Field
3.3.2 Historical Codepoint Definition
3.3.3 Current Codepoint Allocation

3.4 Traffic Classification and Conditioning

3.4.1 Classifier
3.4.2 Traffic Conditioner
3.4.3 Location of Traffic Classifiers and Conditioners
3.4.4 Configuring Traffic Classifiers and Conditioners

3.5 Assured Forwarding

3.5.1 AF PHB Group
3.5.2 Implementation Guideline
3.5.3 Example Services

3.6 Expedited Forwarding

3.6.1 EF PHB
3.6.2 Implementation Guideline

3.7 Interoperability with Non-DS-Compliant Networks

3.7.1 Non-DS-Compliant Node within a DS Domain
3.7.2 Transit Non-DS-Capable Domain

3.8 Packet Classification

3.8.1 Basic Requirements
3.8.2 Classification Algorithms

3.9 Traffic Policing 37

3.9.1 Metering and Marking
3.9.2 Dual Token Bucket Algorithm

3.10 End-to-End Resource Management

3.10.1 Integrated Services over Differentiated Services
3.10.2 Inter-Domain Bandwidth Allocation
3.10.3 End-System Congestion Control

3.11 Performance Issues in Differentiated Services

3.11.1 Network Configuration
3.11.2 Traffic Profiles and Bottleneck Bandwidth
3.11.3 Protection from Mis-Behaving Sources

3.12 Summary

Chapter Four: Multi-Protocol Label Switching

4.1 Introduction
4.2 Motivation

4.2.1 IP over ATM Integration
4.2.2 Simpler Forwarding Paradigm
4.2.3 Traffic Engineering

4.3 Overview

4.3.1 Routing vs Switching
4.3.2 Label Switching Proposals
4.3.3 Comparison of Approaches

4.4 MPLS Architecture

4.4.1 Key Concepts
4.4.2 Forwarding Equivalency Classes
4.4.3 Hierarchy and Label Stacking
4.4.4 Label Stack Encoding
4.4.5 Loop Detection

4.5 Label Distribution Protocols

4.5.1 LDP
4.5.2 CR-LDP
4.5.3 RSVP-TE
4.5.4 Comparison

4.6 Summary 4.7 Further Reading

Chapter Five: Internet Traffic Engineering

5.1 Introduction
5.2 The Fish Problem
5.3 Traffic Engineering Solutions
5.4 Optimization Objectives
5.5 Building Blocks

5.5.1 Data Repository
5.5.2 Topology and State Discovery
5.5.3 Traffic Demand Estimation
5.5.4 Route Computation
5.5.5 Network Interface

5.6 Topology and State Discovery
5.7 Constraint-Based Routing

5.7.1 Mathematical Formulation
5.7.2 Overlay Model
5.7.3 Peer Model

5.8 Multi-Path Loadsharing

5.8.1 Direct Hashing
5.8.2 Table-Based Hashing

5.9 Summary

References

L'auteur - Zheng Wang

Zheng Wang has been involved in Internet-related research and development for the last 14 years. He is currently with Bell Labs Lucent Technologies, working on high-speed routers and optical transport systems. He has been published in many journals and magazines, and holds patents in IP routing, QoS mechanisms, differentiated services, MPLS, traffic engineering, and optical networking.

Caractéristiques techniques

	PAPIER
Éditeur(s)	Morgan Kaufmann
Auteur(s)	Zheng Wang
Parution	01/03/2001
Nb. de pages	239
Format	19 x 24,2
Couverture	Relié
Poids	739g
Intérieur	Noir et Blanc
EAN13	9781558606081
ISBN13	978-1-55860-608-1