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Chapter 1 Introduction 1

Standards 2

Network Management 3

Security 4

VLANs—Benefits and Problems 4

The Vendors 5

Preface 6

Chapter 2 Virtual Organizations 7

Acknowledgments 8

Organizational Trends 8

Implications of Changes for IT 17

Security 18

Support 19

Access Needs 19

Chapter 3 Network Construction Basics 21

OSI Reference Model 22

LAN Standards 28

LAN Types 31

Data Format 38

The Role of Bridges, Routers，and Switches in Networks 38

An Overview of Switching 42

Chapter 4 VLAN Construction 49

VLAN Types 52

Automation 69

Communicating VLAN Membership Information 70

VLAN Issues 72

Equipment Used 76

Managing Switched Networks and VLANs 78

Chapter 5 Standards 85

Background 86

IEEE 802.1D 86

IEEE 802.1P 90

IEEE 802.1Q 96

IEEE 802.1O 104

LANE 105

MPOA 108

Classic IP over ATM 109

DHCP and BOOTP 110

ARP and ICMP 113

IPv6 115

Chapter 6 Managing VLANs 127

The Need for VLAN Management 127

Traffic Management in Switched Networks 129

RMON in a Switched Environment 144

ATM Switching in Traffic Management 154

Is ATM Manageable? 165

Modeling 170

VLAN Management Complexity 178

Chapter 7 Security 209

Switched Networks and VLAN Security 209

VLANs as Security Domains 225

Product Categories 237

Where We Are Now with VLAN Security 245

Advanced VLAN Secunty Topics 247

Security Standards 252

Chapter 8 Benefits, Problems, and Performance Considerations 257

Benefits of VLANs 257

Problems with VLANs 265

Enhancing VLAN Performance 275

The VLAN and the WAN 277

Chapter 9 Current Products Available 279

The VLAN Vendor Scene 279

Detailed Implementation Notes 301

Recommendations 346

Chapter 10 Looking to the Future 353

Will VLANs Be Taken Up? 353

How VLANs Will Change Our Enterprise Networks 355

Appendix A The Vendors 357

Appendix B Standards Bodies 369

Glossary 373

Bibliography 393

Index 397