QOS-enabled networks : tools and foundations / Miguel Barreiros, Peter Lundqvist.

Format:

Book

Author/Creator:

Barreiros, Miguel, 1977- author.

Lundqvist, Peter, 1968- author.

Series:

Wiley series in communications networking & distributed systems.

Wiley series on communications networking & distributed systems

Wiley series in communications networking & distributed systems

Language:

English

Subjects (All):

Computer networks--Quality control.

Computer networks.

Telecommunication--Traffic.

Telecommunication.

Telecommunication systems--Evaluation.

Telecommunication systems.

Physical Description:

1 online resource (256 p.)

Edition:

Second edition.

Distribution:

[Piscataqay, New Jersey] : IEEE Xplore, [2015]

Other Title:

Quality of Service-enabled networks

Place of Publication:

Chichester, West Sussex, UK : John Wiley & Sons Inc., 2016.

Language Note:

English

System Details:

text file

Summary:

With a foreword by Kannan Kothandaraman "This is the first book about QOS that I actually enjoyed reading precisely because the authors focused on real-life QoS and not in academic discussions about it." Per Nihlen, IP Network Manager, NORDUnet The new authoritative, practical guide to delivering QOS guarantees This new benchmark in quality of service (QOS) study is written by two experts in the field who deal with QOS predicaments every day. The authors not only provide a lucid understanding of modern theory of QOS mechanisms in packet networks but how to apply them in practice. In addition, they detail the QOS management features found in modern routers used by Internet Service Providers (ISPs) and large enterprise companies and networks, all in an effort to enable network managers and engineers to configure production networks with a quality of service guarantee. The book's focus on addressing network behavior ("real effects") in relation to the configuration of network elements (routers and switches), is both refreshing and insightful. QOS-Enabled Networks contains up-to-date coverage of: - QOS mechanisms in packet networks and how to apply them in practice - QOS management features now common in modern-day routers - How network behavior is related to configuration of network elements - Layer 2 VPN and QOS - QOS in mobile LTE networks QOS-Enabled Networks is an invaluable guide for networking engineers needing to provide QOS services for service providers, ISPs and large enterprises, as well as for network design and operations engineers.

Contents:

About the Authors x

Foreword xi

Preface xiii

Acknowledgments xv

Abbreviations xvi

Part I THE QOS REALM 1

1 The QOS World 3

1.1 Operation and Signaling 4

1.2 Standards and Per?]Hop Behavior 5

1.3 Traffic Characterization 8

1.4 A Router without QOS 11

1.5 Conclusion 12

References 12

Further Reading 12

2 The QOS Tools 13

2.1 Classifiers and Classes of Service 13

2.2 Metering and Coloring - CIR/PIR Model 15

2.3 The Policer Tool 16

2.4 The Shaper Function 17

2.5 Comparing Policing and Shaping 18

2.6 Queue 19

2.7 The Scheduler 21

2.8 The Rewrite Tool 21

2.9 Example of Combining Tools 23

2.10 Delay and Jitter Insertion 27

2.11 Packet Loss 31

2.12 Conclusion 32

Reference 33

3 Challenges 34

3.1 Defining the Classes of Service 35

3.2 Classes of Service and Queues Mapping 37

3.3 Inherent Delay Factors 40

3.4 Congestion Points 46

3.5 Trust Borders 49

3.6 Granularity Levels 51

3.7 Control Traffic 53

3.8 Trust, Granularity, and Control Traffic 54

3.9 Conclusion 56

Further Reading 56

4 Special Traffic Types and Networks 57

4.1 Layer 4 Transport Protocols: UDP and TCP 58

4.1.1 The TCP Session 61

4.1.2 TCP Congestion Mechanism 64

4.1.3 TCP Congestion Scenario 65

4.1.4 TCP and QOS 66

4.2 Data Center 67

4.2.1 SAN Traffic 68

4.2.2 Lossless Ethernet Networks 69

4.2.3 Virtualization 71

4.2.4 Software Defined Networks 73

4.2.5 DC and QOS 74

4.3 Real?]Time Traffic 74

4.3.1 Control and Data Traffic 75

4.3.2 Voice over IP 76

4.3.3 IPTV 78

4.3.4 QOS and Real?]Time Traffic 79

Reference 80

Further Reading 80

Part II TOOLS 81

5 Classifiers 83

5.1 Packet QOS Markings 84

5.2 Inbound Interface Information 85

5.3 Deep Packet Inspection 87

5.4 Selecting Classifiers 88

5.5 The QOS Network Perspective 89

5.6 MPLS DiffServ?]TE 92

5.7 Mixing Different QOS Realms 94

5.8 Conclusion 99

References 100

6 Policing and Shaping 101.

6.1 Token Buckets 101

6.2 Traffic Bursts 106

6.3 Dual?]Rate Token Buckets 109

6.4 Shapers and Leaky Buckets 110

6.5 Excess Traffic and Oversubscription 112

6.6 Comparing and Applying Policer and Shaper Tools 113

6.7 Conclusion 116

Reference 116

7 Queuing and Scheduling 117

7.1 Queuing and Scheduling Concepts 117

7.2 Packets and Cellification 119

7.3 Different Types of Queuing Disciplines 121

7.4 FIFO 121

7.5 FQ 123

7.6 PQ 125

7.7 WFQ 127

7.8 WRR 128

7.9 DWRR 131

7.10 PB?]DWRR 137

7.11 Conclusions about the Best Queuing Discipline 141

Further Reading 142

8 Advanced Queuing Topics 143

8.1 Hierarchical Scheduling 143

8.2 Queue Lengths and Buffer Size 146

8.3 Dynamically Sized versus Fixed?]Size Queue Buffers 149

8.4 RED 150

8.5 Using RED with TCP Sessions 152

8.6 Differentiating Traffic inside a Queue with WRED 154

8.7 Head versus Tail RED 156

8.8 Segmented and Interpolated RED Profiles 158

8.9 Conclusion 160

Reference 161

Further Reading 161

Part III CASE STUDIES 163

9 The VPLS Case Study 165

9.1 High?]Level Case Study Overview 166

9.2 Virtual Private Networks 167

9.3 Service Overview 168

9.4 Service Technical Implementation 170

9.5 Network Internals 171

9.6 Classes of Service and Queue Mapping 172

9.7 Classification and Trust Borders 174

9.8 Admission Control 175

9.9 Rewrite Rules 176

9.10 Absorbing Traffic Bursts at the Egress 179

9.11 Queues and Scheduling at Core?]Facing Interfaces 179

9.12 Queues and Scheduling at Customer?]Facing Interfaces 182

9.13 Tracing a Packet through the Network 183

9.14 Adding More Services 186

9.15 Multicast Traffic 188

9.16 Using Bandwidth Reservations 190

9.17 Conclusion 191

Further Reading 191

10 Case Study QOS in the Data Center 192

10.1 The New Traffic Model for Modern Data Centers 192

10.2 The Industry Consensus about Data Center Design 196

10.3 What Causes Congestion in the Data Center? 199.

10.3.1 Oversubscription versus Microbursts 199

10.3.2 TCP Incast Problem 202

10.4 Conclusions 205

Further Reading 207

11 Case Study IP RAN and Mobile Backhaul QOS 208

11.1 Evolution from 2G to 4G 208

11.2 2G Network Components 209

11.3 Traffic on 2G Networks 211

11.4 3G Network Components 211

11.5 Traffic on 3G Networks 215

11.6 LTE Network Components 216

11.7 LTE Traffic Types 219

11.8 LTE Traffic Classes 220

11.9 Conclusion 224

References 227

Further Reading 227

12 Conclusion 228

Index 230.

Notes:

Description based upon print version of record.

Includes bibliographical references at the end of each chapters and index.

Description based on print version record.

ISBN:

9781119109129

1119109124

9781119109112

1119109116

OCLC:

935251603