| This book starts with a brief overview of mobility and wireless technology. It then presents a detailed introduction to the Mobile IP protocol, and it addresses the practical application of Mobile IP in real-world environments. It looks in depth at advanced Mobile IP features, including NAT traversal, integration with IPSec, and network mobility. Mobility solutions addressed in the book include enterprise campus wireless LAN and metropolitan mobility, for both individual devices and whole networks (network mobility). The book builds upon itself, with material presented in an earlier chapter being applicable to scenarios in later chapters. The book delves into Cisco IOS Mobile IP configurations, demonstrating working implementations of the Cisco Mobile IP components. It includes troubleshooting methodologies for common failures and best practices. The book is supported by real-world examples throughout the text. Each example is designed to teach configuration, management, and troubleshootingall of which are directly applicable to users' network mobility needs. This book is divided into nine chapters and an appendix, and each chapter details an important facet of Mobile IP, as follows: Chapter 1, "Mobile and Wireless Technologies," introduces the concept of mobility and the requirements of mobility protocols. Wireless networking technologies are also introduced. Chapter 2, "Understanding Mobile IP," takes a detailed look at the Mobile IP protocol. The necessary components of a Mobile IP network are defined. Features, functions, and message flows are also covered. Chapter 3, "Mobile IP Security," examines security concepts related to Mobile IP, including protocol authentication and dynamic keying. Chapter 4, "IOS Mobile IP in the Lab," introduces Cisco IOS Mobile IP in an easy-to-learn lab format. A basic topology is built and evaluated, and then alternate scenarios are presented. Chapter 5, "Campus Mobility: Client-Based Mobile IP," looks at Mobile IP deployment in campus (intranet) networks. High-availability solutions and integration with AAA servers are covered. Chapter 6, "Metro Mobility: Client-Based Mobile IP," goes beyond the campus to look at metro mobility. Features covered include reverse tunneling, firewall and NAT traversal, and integration with VPN technologies. Chapter 7, "Metro Mobility: Cisco Mobile Networks," takes a close look at Cisco Mobile Networks, a Mobile IP client on a router. Basic configuration details are covered first, followed by integration topics including redundancy, QoS, and VPN. Chapter 8, "Deployment Scalability and Management," circles back to look at management and operation of the Mobile IP infrastructure. Home Address management, scalability considerations, and network management are explored. Chapter 9, "A Look Ahead," looks to the future of mobility, presenting current work and future ideas. Layer 2 integration challenges are addressed, and Mobile IPv6 is introduced. We finish with unstructured mobility and mobile ad hoc networking. Appendix A, "Answers to Review Questions," provides the answers to the "Review Questions" sections that appear at the end of each chapter. Appendix B, "IOS Mobile IP: Supported SNMP MIBs," contains a graphical representation of the Mobile IP Management Information Base (MIB) objects available in Cisco IOS.
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