Introduction to IP address management

Effective IP Address Management (IPAM) has become crucial to maintaining high-performing IP services such as data, video, and voice over IP. This book provides a concise introduction to the three core IPAM networking technologies--IPv4 and IPv6 addressing, Dynamic Host Configuration Protocol (DHCP), and Domain Name System (DNS)--as well as IPAM practice and techniques needed to manage them cohesively.

The book begins with a basic overview of IP networking, including a discussion of protocol layering, addressing, and routing. After a review of the IPAM technologies, the book introduces the major components, motivation, benefits, and basic approaches of IPAM. Emphasizing the necessity of a disciplined "network management" approach to IPAM, the subsequent chapters enable you to:

Understand IPAM practices, including managing your IP address inventory and tracking of address transactions (such as allocation and splitting address space, discovering network occupancy, and managing faults and performance)

Weigh the costs and justifications for properly implementing an IPAM strategy

Use various approaches to automating IPAM functions through workflow

Learn about IPv4-IPv6 co-existence technologies and approaches

Assess security issues with DHCP network access control approaches and DNS vulnerabilities and mitigation including DNSSEC

Evaluate the business case for IPAM, which includes derivation of the business case cost basis, identification of savings when using an IP address management system, associated costs, and finally net results

Introduction to IP Address Management concludes with a business case example, providing a real-world financial perspective of the costs and benefits of implementing an IP address management solution. No other book covers all these subjects cohesively from a network management perspective, which makes this volume imperative for manager-level networking professionals who need a broad understanding of both the technical and business aspects of IPAM. In addition, technologists interested in IP networking and address management will find this book valuable.

To obtain a free copy of the IPAM Configuration Guide please send an email to:

ieeeproposals@wiley.com

Author Notes

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. ATT 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	p. ix
Acknowledgments	p. xiii
1 IP Networking Overview	p. 1
IP Networking 101	p. 1
IP Networking 102	p. 9
Highlights of Internet Protocol History	p. 21
2 Internet Protocol Addressing	p. 25
The IP Header	p. 25
Binary Review	p. 25
IP Addressing	p. 26
Classless Addressing	p. 33
Special Use IPv4 Addresses	p. 34
IP Version 6 (IPv6)	p. 35
IPv6 Address Allocations	p. 39
IPv6 Address Autoconfiguration	p. 41
Required Host IPv6 Addresses	p. 45
Regional Internet Registries	p. 46
Key IP Addressing Management Challenges	p. 49
3 Dynamic Host Configuration Protocol (DHCP)	p. 53
Introduction	p. 53
DHCP Overview	p. 54
DHCP for IPv6 (DHCPv6)	p. 59
DHCP Server Deployment Considerations	p. 64
Other Means of Dynamic Address Assignment	p. 67
Key DHCP Management Challenges	p. 67
4 The Domain Name System (DNS)	p. 69
DNS Overview-Domains and Resolution	p. 69
Name Resolution	p. 71
Zones and Domains	p. 74
Resolver Configuration	p. 79
DNS Update	p. 80
Resource Records	p. 80
DNS Server Deployment Considerations	p. 82
Key DNS Management Challenges	p. 84
5 IP Address Management Overview	p. 85
Key Elements of IP Address Management	p. 85
Applications of Address Management Technologies	p. 87
Potential Impacts of Inadequate IP Address Management	p. 95
IP Address Management as Network Management	p. 95
IP Address Management Business Benefits	p. 96
Common Approaches and IPAM Evolution	p. 99
6 IP Address Management Practices	p. 101
FCAPS Summary	p. 101
Common IP Management Tasks	p. 102
Configuration Management	p. 102
Fault Management	p. 122
Accounting Management	p. 126
Performance Management	p. 130
Security Management	p. 132
Disaster Recovery/Business Continuity	p. 133
ITIL® Process Mappings	p. 134
7 IP Address Management Workflow	p. 139
What is Workflow?	p. 140
Workflow Realization	p. 144
Workflow Benefits	p. 145
Workflow Scenarios	p. 147
Summary	p. 153
8 IPv6 Deployment and IPv4 Co-Existence	p. 155
Why Implement IPv6?	p. 156
Dual Stack Approach	p. 157
Tunneling Approaches	p. 160
Translation Approaches	p. 164
9 Security Considerations	p. 169
DHCP and Network Access Security	p. 169
Network Access Control (NAC)	p. 170
Alternative Access Control Approaches	p. 175
Securing DHCP Servers	p. 179
DNS Vulnerabilities	p. 182
Mitigation Approaches	p. 186
DNS Security Extensions (DNSSEC)	p. 187
10 IP Address Management Business Case	p. 197
Business Case Overview	p. 198
Business Case Cost Basis	p. 198
Savings with IPAM Deployment	p. 221
Business Case Expenses	p. 222
Netting It Out: Business Case Results	p. 224
Conclusion	p. 225
Appendix A IPv4 DHCP Options	p. 227
Appendix B DHCPv6 Options	p. 241
Appendix C DNS Resource Record Summary	p. 249
Glossary	p. 253
Bibliography	p. 255
Index	p. 261

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Table of Contents