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More About This Title Advanced QoS for Multi-Service Based IP/MPLS Networks
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Introduction xxv
Part 1 Fundamentals of IP/MPLS QoS
Chapter 1 The Need for Quality of Service 3
1.1 The Changing Service Delivery Landscape 4
1.2 What Is Quality of Service? 5
1.3 Alcatel-Lucent Service Router Portfolio 6
1.4 Network Service Restrictions and Service Level Agreements 11
Summary 15
Chapter 2 QoS Models And Network Convergence 17
2.1 The Integrated Services QoS Model 18
2.2 The Differentiated Services QoS Model 20
Summary 27
Chapter 3 Understanding Type of Service Markings 29
3.1 The IP Header ToS Field 30
3.2 DiffServ Per-Hop Behaviors 37
3.3 Ethernet Frame Formats and the 802.1p ToS Field 40
3.4 MPLS Shim Header and EXP Field 44
Summary 46
Chapter 4 Fundamental QoS Features 47
4.1 Traffic Classification 48
4.2 Queuing and Buffer Management 50
4.3 Scheduling 51
4.4 Rate-Limiting 52
4.5 Filtering 54
Summary 55
Part 2 ALSRP QoS Features
Chapter 5 ALSRP Architecture and Quality of Service Implementation 59
5.1 An Overview of ALSRP’s Generic Architecture 60
5.2 The IOM Layout and Fast-path Complexes 62
5.3 The QoS Features Enforcement Sequence 64
5.4 Network Demarcation Points 66
5.5 End-to-End Traffic Management in an ALSRP Network 69
Summary 72
Chapter 6 Network Traffic Classification 75
6.1 End-to-End Traffic Mapping and Marking 77
6.2 Forwarding Classes and Queuing Priorities in ALSRP 80
6.3 Profile States of Datagrams and Queues 81
6.4 SAP-Ingress Policy and Traffic Mapping at Access Ingress 83
6.5 Applying the SAP-Ingress Policy 100
6.6 Network QoS Policy 102
6.7 Applying Network QoS Policy 110
6.8 SAP-Egress Policy and Traffic Marking at Access Egress 111
6.9 Applying a SAP-Egress Policy 113
6.10 Verification Commands for QoS Policy Application 115
Summary 117
Chapter 7 Advanced Traffic Classification 119
7.1 Forwarding Subclasses 120
7.2 Color-Aware Profiling 122
7.3 Honoring the Three Drop Precedence of Assured Forwarding PHB 124
7.4 Access Ingress Marking of IP Packets 125
7.5 The Trust Nature of Interfaces and Network Egress Marking 128
7.6 Selecting a ToS Field in QinQ Encapsulated Frames 132
7.7 Tunnel Termination QoS Override 139
Summary 141
Chapter 8 Queuing and Buffer Management 143
8.1 Understanding Buffer Partitions 144
8.2 Buffer-Related Queue Parameters 152
8.3 Configuring Access Queues and Queue Mapping 155
8.4 Network-Queue Policy 162
8.5 Applying a Network-Queue Policy 166
8.6 Buffer Management 171
8.7 Slope Policy 180
8.8 Applying Slope Policy 182
8.9 Verification Commands for Buffer Management 184
Summary 190
Chapter 9 Hardware Queue Enabling Options at Access Ingress 193
9.1 Configuring the Scaling Options 194
9.2 An Example for Comparing the Scaling Options 196
9.3 Service Queuing 198
9.4 Shared Queuing 201
9.5 Multipoint Shared Queuing 206
9.6 Comparing the Scaling Options 210
9.7 Verification Commands Associated with the Scaling Options 210
Summary 217
Chapter 10 Scheduling 219
10.1 Scheduling-Related Queue Parameters 220
10.2 Scheduling Modes 225
10.3 Nodal Scheduling: Putting It All Together 231
10.4 Configuring Scheduling Parameters of Access Queues 233
10.5 Configuring Scheduling Parameters of Network Queues 235
10.6 Verification Commands for Scheduling 238
Summary 247
Chapter 11 Hierarchical Scheduling 249
11.1 Hierarchical Scheduling Parameters 251
11.2 Virtual Scheduler Bandwidth Distribution 252
11.3 Examples of Virtual Scheduler Bandwidth Distribution 254
11.4 Creating and Configuring a Scheduler Policy 263
11.5 Applying a Scheduler Policy 267
11.6 Verification Commands for Hierarchical Scheduling 276
Summary 287
Chapter 12 Traffic Rate-Limiting 289
12.1 Policing Network Traffic 291
12.2 Rendering Traffic Conforming by Using Shaping 298
12.3 Shapeless Policing 299
12.4 Traffic Rate-Limiting: Putting It All Together 300
Summary 302
Chapter 13 Special Topics 303
13.1 Link Aggregation Group and QoS Adaptation 304
13.2 Link Fragmentation and Interleaving 310
13.3 QoS Policy Overrides 313
13.4 Service Assurance Agent 318
13.5 Time-Based QoS 338
Summary 356
Part 3 Designing Quality of Service
Chapter 14 QoS Design Principles and Service Requirements 361
14.1 Understanding QoS Design Principles 362
14.2 Service Requirements of Common Application Traffic 366
14.3 QoS Design Approach: A Case Study 372
Summary 392
Chapter 15 Hierarchical Scheduling Design—A Case Study 395
15.1 Case Study Details 396
15.2 Design Requirements 398
15.3 Basic Configuration 399
15.4 Design Option 1: Basic Scheduling 400
15.5 Design Option 2: Single-Tier Virtual Hierarchical Scheduling 402
15.6 Design Option 3: Two-Tier Virtual Hierarchical Scheduling 404
Summary 407
Glossary 409
Index 417
