Introduction to IP Address Management (eBook)

TIMOTHY ROONEY has worked with IP technologies in various capacities over the last sixteen years, including systems engineering and development. He has an extensive background not only in IP, but also in telecommunications, wireless services, and software, having worked at Bell Laboratories, AT'T Wireless, Lucent Technologies, and BT. In his current role as Director of Product Management with BT Diamond IP, Rooney is responsible for the overall BT Diamond IP product lifecycle, managing product features and releases, as well as supporting sales and marketing.

Preface ix

Acknowledgments xiii

1 IP Networking Overview 1

IP Networking 101 1

IP Networking 102 9

Highlights of Internet Protocol History 21

2 Internet Protocol Addressing 25

The IP Header 25

Binary Review 25

IP Addressing 26

Classless Addressing 33

Special Use IPv4 Addresses 34

IP Version 6 (IPv6) 35

IPv6 Address Allocations 39

IPv6 Address Autoconfiguration 41

Required Host IPv6 Addresses 45

Regional Internet Registries 46

Key IP Addressing Management Challenges 49

3 Dynamic Host Configuration Protocol (DHCP) 53

Introduction 53

DHCP Overview 54

DHCP for IPv6 (DHCPv6) 59

DHCP Server Deployment Considerations 64

Other Means of Dynamic Address Assignment 67

Key DHCP Management Challenges 67

4 The Domain Name System (DNS) 69

DNS Overview--Domains and Resolution 69

Name Resolution 71

Zones and Domains 74

Resolver Configuration 79

DNS Update 80

Resource Records 80

DNS Server Deployment Considerations 82

Key DNS Management Challenges 84

5 IP Address Management Overview 85

Key Elements of IP Address Management 85

Applications of Address Management Technologies 87

Potential Impacts of Inadequate IP Address Management 95

IP Address Management as Network Management 95

IP Address Management Business Benefits 96

Common Approaches and IPAM Evolution 99

6 IP Address Management Practices 101

FCAPS Summary 101

Common IP Management Tasks 102

Configuration Management 102

Fault Management 122

Accounting Management 126

Performance Management 130

Security Management 132

Disaster Recovery/Business Continuity 133

ITIL® Process Mappings 134

7 IP Address Management Workflow 139

What Is Workflow? 140

Workflow Realization 144

Workflow Benefits 145

Workflow Scenarios 147

Summary 153

8 IPv6 Deployment and IPv4 Co-Existence 155

Why Implement IPv6? 156

Dual Stack Approach 157

Tunneling Approaches 160

Translation Approaches 164

9 Security Considerations 169

DHCP and Network Access Security 169

Network Access Control (NAC) 170

Alternative Access Control Approaches 175

Securing DHCP Servers 179

DNS Vulnerabilities 182

Mitigation Approaches 186

DNS Security Extensions (DNSSEC) 187

10 IP Address Management Business Case 197

Business Case Overview 198

Business Case Cost Basis 198

Savings with IPAM Deployment 221

Business Case Expenses 222

Netting It Out: Business Case Results 224

Conclusion 225

Appendix A IPv4 DHCP Options 227

Appendix B DHCPv6 Options 241

Appendix C DNS Resource Record Summary 249

Glossary 253

Bibliography 255

Index 261