Deploying IP and MPLS QoS for Multiservice Networks (eBook)

Theory and Practice

John William Evans, Clarence Filsfils (Autoren)

eBook Download: PDF

2010 | 1. Auflage
456 Seiten
Elsevier Science (Verlag)
9780080488684 (ISBN)

Infos

QoS, short for quality of service, is one of the most important goals a network designer or administrator will have. Ensuring that the network runs at optimal precision with data remaining accurate, traveling fast, and to the correct user are the main objectives of QoS. The various media that fly across the network including voice, video, and data have different idiosyncrasies that try the dimensions of the network. This malleable network architecture poses an always moving potential problem for the network professional.

The authors have provided a comprehensive treatise on this subject. They have included topics such as traffic engineering, capacity planning, and admission control. This book provides real world case studies of QoS in multiservice networks. These case studies remove the mystery behind QoS by illustrating the how, what, and why of implementing QoS within networks. Readers will be able to learn from the successes and failures of these actual working designs and configurations.

*Helps readers understand concepts of IP QoS by presenting clear descriptions of QoS components, architectures, and protocols
*Directs readers in the design and deployment of IP QoS networks through fully explained examples of actual working designs
*Contains real life case studies which focus on implementation

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QoS, short for "e;quality of service, is one of the most important goals a network designer or administrator will have. Ensuring that the network runs at optimal precision with data remaining accurate, traveling fast, and to the correct user are the main objectives of QoS. The various media that fly across the network including voice, video, and data have different idiosyncrasies that try the dimensions of the network. This malleable network architecture poses an always moving potential problem for the network professional.The authors have provided a comprehensive treatise on this subject. They have included topics such as traffic engineering, capacity planning, and admission control. This book provides real world case studies of QoS in multiservice networks. These case studies remove the mystery behind QoS by illustrating the how, what, and why of implementing QoS within networks. Readers will be able to learn from the successes and failures of these actual working designs and configurations. - Helps readers understand concepts of IP QoS by presenting clear descriptions of QoS components, architectures, and protocols- Directs readers in the design and deployment of IP QoS networks through fully explained examples of actual working designs- Contains real life case studies which focus on implementation

Inhalt

Front Cover 1
Deploying IP and MPLS QOS for Multiservice Networks 4
Copyright Page 5
Contents 6
Preface 14
Acknowledgments 22
About the authors 24
Chapter 1 QOS Requirements and Service Level Agreements 26
1.1 Introduction 26
1.2 SLA Metrics 29
1.2.1 Network Delay 29
1.2.2 Delay-jitter 33
1.2.3 Packet Loss 34
1.2.4 Bandwidth and Throughput 37
1.2.5 Per Flow Sequence Preservation 43
1.2.6 Availability 45
1.2.7 Quality of Experience 47
1.3 Application SLA Requirements 49
1.3.1 Voice over IP 51
1.3.2 Video 63
1.3.3 Data Applications 83
1.4 Marketed SLAs versus Engineered SLAs 101
1.4.1 End-to-End SLAs vs Segmented SLAs 102
1.4.2 Inter-provider SLAs 102
1.5 Intserv and Diffserv SLAs 103
References 104
Chapter 2 Introduction to QOS Mechanics and Architectures 112
2.1 What is Quality of Service? 112
2.1.1 Quality of Service vs Class of Service or Type of Service? 113
2.1.2 Best-effort Service 114
2.1.3 The Timeframes that Matter for QOS 115
2.1.4 Why IP QOS? 116
2.1.5 The QOS Toolset 116
2.2 Data Plane QOS Mechanisms 119
2.2.1 Classification 119
2.2.2 Marking 124
2.2.3 Policing and Metering 125
2.2.4 Queuing, Scheduling, Shaping, and Dropping 137
2.2.5 Link Fragmentation and Interleaving 165
2.3 IP QOS Architectures 166
2.3.1 A Short History of IP Quality of Service 166
2.3.2 Type of Service/IP Precedence 167
2.3.3 Integrated Services Architecture 172
2.3.4 Differentiated Services Architecture 172
2.3.5 IPv6 QOS Architectures 195
2.3.6 MPLS QOS Architectures 196
2.3.7 IP Multicast and QOS 206
2.4 Typical Router QOS Implementations in Practice 208
2.5 Layer 2 QOS 214
2.5.1 ATM 215
2.5.2 Frame-relay 219
2.5.3 Ethernet 221
2.6 Complementary Technologies 222
2.7 Where QOS cannot make a difference 223
References 224
Appendix 2.A: Precedence, TOS, and DSCP Conversion 229
2.A.1 Notation 229
2.A.2 Conversion 230
Chapter 3 Deploying Diffserv 234
3.1 Introduction 234
3.2 Deploying Diffserv at the Network Edge 236
3.2.1 Why is the Edge Key for Tight SLA Services? 236
3.2.2 Edge Diffserv Case Study 237
3.3 Deploying Diffserv in the Network Backbone 274
3.3.1 Is Diffserv Needed in the Backbone? 274
3.3.2 Core Case Study 278
3.4 Tuning (W)RED 293
3.4.1 Tuning the Exponential Weighting Constant 294
3.4.2 Tuning Minth and Maxth 295
3.4.3 Mark Probability Denominator 296
3.4.4 In- and Out-of-contract 296
References 297
Chapter 4 Capacity Admission Control 300
4.1 Introduction 300
4.1.1 When is Admission Control Needed? 302
4.1.2 A Taxonomy for Admission Control 307
4.1.3 What Information is Needed for Admission Control? 310
4.1.4 Parameterized or Measurements-based Algorithms 311
4.2 Topology-unaware Off-path CAC 315
4.3 Topology-aware Off-path CAC: "Bandwidth Manager" 317
4.3.1 Example Bandwidth Manager Method of Operation: Next Generation Network Voice CAC 319
4.4 The Integrated Services Architecture/RSVP 328
4.4.1 RSVP 329
4.4.2 RSVP Example Reservation Setup 332
4.4.3 Application Signaling Interaction 339
4.4.4 Intserv over Diffserv 341
4.4.5 RSVP Aggregation 345
4.4.6 RSVP Traffic Engineering 350
4.5 NSIS 351
4.6 End-system Measurement-based Admission Control 353
4.7 Summary 354
References 355
Chapter 5 SLA and Network Monitoring 360
5.1 Introduction 360
5.2 Passive Network Monitoring 361
5.2.1 How Often to Poll? 362
5.2.2 Per-link Statistics 362
5.2.3 System Monitoring 371
5.2.4 Core Traffic Matrix 372
5.3 Active Network Monitoring 373
5.3.1 Test Stream Parameters 374
5.3.2 Active Measurement Metrics 383
5.3.3 Deployment Considerations 389
References 396
Chapter 6 Core Capacity Planning and Traffic Engineering 400
6.1 Core Network Capacity Planning 400
6.1.1 Capacity Planning Methodology 401
6.1.2 Collecting the Traffic Demand Matrices 402
6.1.3 Determine Appropriate Over-provisioning Factors 407
6.1.4 Simulation and Analysis 413
6.2 IP Traffic Engineering 414
6.2.1 The Problem 415
6.2.2 IGP Metric-based Traffic Engineering 419
6.2.3 MPLS Traffic Engineering 422
References 439
Index 444
A 444
B 444
C 445
D 446
E 447
F 448
G 448
H 448
I 448
J 449
L 449
M 450
N 450
O 451
P 451
Q 452
R 453
S 454
T 455
U 456
V 456
W 456

Produkt-Details

• Erscheint lt. Verlag: 26.7.2010
• Sprache: englisch
• Themenwelt: Sachbuch/Ratgeber
• Themenwelt: Mathematik / Informatik ► Informatik ► Netzwerke
• Themenwelt: Mathematik / Informatik ► Informatik ► Theorie / Studium
• Themenwelt: Mathematik / Informatik ► Informatik ► Web / Internet
• ISBN-13: 9780080488684 / 9780080488684