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Mobil IP: Design Principles and Practices

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Mobil IP: Design Principles and Practices


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  • Copyright 1998
  • Pages: 304
  • Edition: 1st
  • Book
  • ISBN-10: 0-201-63469-4
  • ISBN-13: 978-0-201-63469-3

This book introduces the TCP/IP_savvy reader to the design and implementation of Internet protocols useful for maintaining network connections while moving from place to place. It describes the technology that makes mobile networking possible; in particular, it focuses on Mobile IP, the Internet Engineering Task Force (IETF) Standard for mobile networking. Written by Charles E. Perkins, a leader in the mobile networking field, this book discusses:

  • Mobile IP
  • Route optimization
  • IP version 6
  • Use of Dynamic Host Configuration Protocol (DHCP)
  • Encapsulation

After reading Mobile IP, a network engineer will be able to produce implementations of Mobile IP for mobile nodes, foreign agents, and home agents. As with any Internet protocol, mobile IP requires precise handling of packetized control data; all of the needed steps for that handling are detailed fully in this book. The necessary control mechanisms for processing advertisements (perhaps received over wireless media) are given first, followed by the main part of the Mobile IP protocol, which addresses how the mobile node registers its current IP attachment information with the support infrastructure on its home network. This book also details how Mobile IP specifies the handling of data packets destined for the mobile node.

In addition to the base protocol, this book also presents newly specified enhancements to Mobile IP, and details the protocol support needed for enabling mobile networks using IPv6, the new version of IP with 128-bit addresses. Interactions between Mobile IP and other protocols (such as DHCP) are described, enabling network engineers to get a complete understanding of the system effects of deploying Mobile IP in enterprise networks. Other current trends in protocol development relevant to Mobile IP are also described, such as ways to reduce registration traffic with the home network, and first steps towards integrating Mobile IP with enterprise security installations such as firewalls and border routers.


Sample Content

Table of Contents

1. Introduction.

Laptop Computing. Wireless Technologies. Information Superhighway. Mobility versus Portability. Quick Overview of IP and Routing. TCP Connections. Two-level Addressing. Abstract Mobility Management Model. Remote Redirection. Example Architectures. Where Mobile Networking Fits. Middleware Components. Proxies versus Mobile-Aware Applications. Summary.

2. Mobile IP Overview.

What Is Mobile IP? Terminology. Protocol Overview. Message Format and Protocol Extensibility. Role of the IETF. Summary.

3. Advertisement.

Agent Solicitation and Discovery Mechanisms. Router Discovery Protocol. Agent Advertisement. Agent Solicitation. Mobility Agent Operation. Agent Discovery by Mobile Nodes. Second Thoughts on Using RFC. Summary.

4. Registration.

Registration Overview. Authentication Overview. Registration Request. Registration Reply. Registration Extensions. Mobile Node Registration Procedures. Foreign Agent Registration Actions. Home Agent Processing for Registrations. Registering Securely. Patent Issues. Example Scenarios. Summary.

5. Delivering Datagrams.

Introduction. IP-in-IP Encapsulation. Minimal Encapsulation. Generic Record Encapsulation. Routing Failures and ICMP Messages. Tunnel Management. Decapsulation by Routers. Decapsulation by IP Nodes. Unicast Datagram Routing. Broadcast Datagrams. Multicast Datagram Routing. Mobile Routers. ARP, Proxy ARP, and Gratuitous ARP. Security Effects of Using Encapsulation. Source Routing Alternatives. Summary.

6. Route Optimization.

Route Optimization Overview. Route Optimization Message Formats. Format of Smooth Handoff Extensions. Messages Requesting A Registration Key. Extensions to Supply a Registration Key. Using Special Tunnels. Mobile Node Key Requests. Miscellaneous Home Agent Operations. Miscellaneous Foreign Agent Operations. Summary.

7. Miscellaneous Topics.

Firewalls. Reverse Tunneling. Broadcast Preference Extension. Multicast Preference Extension. Movement Detection. Management Information Bases (MIBs). Localizing Registrations. Summary.

8. IP version.

An Overview of IPv. Overview of Mobility Support in IPv. Binding Update Option. Binding Acknowledgment Option. Binding Request Option. Movement Detection in IPv. Home Agent Discovery. Smooth Handoffs. Renumbering the Home Subnet. Requirements for Supporting Mobility. Summary.

9. DHCP.

Overview of DHCP. Client/Server Protocol Description. DHCP Option Handling. Using DHCP for Portability. Using DHCP for Mobility. Dual-Mode Operation. DHCP Home Address. Multi-Homing. Administration and Security. Summary.

10. Summary and Future Work.





Two technological advances in recent years have radically altered the nature of computing for most computer users. The first is mobility. Laptop computers now represent the fastest growing segment of the computer market. Most observers expect that laptop computers, palmtop computers, networked personal digital assistants, and other such mobile computers will eventually represent the majority of the stations connected to the Internet. The advantage of mobile computing is that users may access all their applications from any location, whether they are in another building or a different state. The second advance is the widespread use of the Internet for communication, file transfer, and World Wide Web connectivity. This book describes how to make a mobile computer user a citizen of the Internet and how to access everything the information superhighway has to offer. The goal of this book is to provide you with an introduction to the design and implementation of Internet protocols that are useful for maintaining network connections even while moving from place to place. We look at several protocols including Mobile IP, route optimization, IP version 6, the Dynamic Host Configuration Protocol, encapsulation, source routing, and some related miscellaneous topics still under development.

To take full advantage of the information in this book, you should be familiar with basic Internet protocols, such as the Transmission Control Protocol (TCP)/IP. Rich Stevens' book TCP/IP Illustrated, Volume 1: The Protocols and Douglas Comer's Internetworking with TCP/IP both provide excellent introductions to TCP/IP. As a developer of hardware and software products for the Internet, you should have these books on your shelves.

By the time you finish Mobile IP: Design Principles and Practices, you will be able to implement Mobile IP, and will have a clear understanding of the system impact of mobility. You will also understand the relevant protocols, and the traps and pitfalls that you are likely to encounter along the way.

As you read the book, you will notice many italicized terms, some of which have conventional meanings that may be different than one's first impression (for example, foreign agent). These terms are defined in the Glossary: Please check definitions there, and be sure that you understand a term's meaning before moving on in the text.



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