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Mobile IP Technology and Applications


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  • Description
  • Extras
  • Sample Content
  • Updates
  • Copyright 2005
  • Edition: 1st
  • Book
  • ISBN-10: 1-58705-132-X
  • ISBN-13: 978-1-58705-132-6

Real-world solutions for Cisco IOS® Mobile IP configuration, troubleshooting, and management

  • Understand the concept of mobility and the requirements of mobility protocols
  • Learn necessary components of a Mobile IP network, including features, functions, and message flows
  • Examine security concepts related to Mobile IP, including protocol authentication and dynamic keying
  • Evaluate high availability solutions and integration with AAA servers in campus networks
  • Explore the features of metro mobility, including reverse tunneling, firewall, NAT traversal, and integration with VPN technologies
  • Configure IOS Mobile IP networks, including integration topics such as redundancy, QoS, and VPN
  • Manage the Mobile IP infrastructure, including Home Address management, scalability considerations, and network management
  • Take a look at the future of Mobile IP, including Layer 2 integration challenges, Mobile IPv6, unstructured mobility, and mobile ad-hoc networking

Two of the world’s most powerful technology trends, the Internet and mobile communications, are redefining how and when people access information. With the majority of information and new services being deployed over IP, the use of devices such as cellular phones, PDAs, and laptops for accessing data networks is pushing the need for “always on” IP connectivity. The evolution of mobile computing points to a coming together of the best of desktop computing and cellular communications—the predictability and "always connected" experience of the desktop combined with the ease of use and mobility of the cell phone.

One challenge to mobile data communication is moving data across different networks. The solution to this problem is a standards-based protocol: Mobile IP. Mobile IP is an open standard that allows users to keep the same IP address, stay connected, and maintain ongoing applications while roaming between IP networks.

Mobile IP Technology and Applications is the first book to address the practical application of Mobile IP in real-world environments. Cisco IOS® Mobile IP configuration, troubleshooting, and management are covered in depth and supported by real-world examples. Mobility solutions addressed in this book include enterprise campus wireless LANs and metropolitan mobility for both individual devices and whole networks. Each example is designed to teach configuration, management, and troubleshooting in a manner that is directly applicable to common mobility needs.

Whether you are looking for an introduction to IP mobility or detailed examples of Mobile IP technology in action, Mobile IP Technology and Applications is your complete resource for reaping the benefits that secure, reliable mobile communications have to offer.

"IP Mobility provides the capability not only for me to connect to the world at large, but for it to find and connect to me."

—Fred Baker, Cisco Fellow, Cisco Systems, Inc.

This book is part of the Cisco Press® Networking Technology Series, which offers networking professionals valuable information for constructing efficient networks, understanding emerging technologies, and building successful networking careers.

Online Sample Chapter

Mobile IP Technology and Applications

Downloadable Sample Chapter

Download - 117 KB -- Chapter 4: IOS Mobile IP in the Lab

Table of Contents



Chapter 1               Mobile and Wireless Technologies


Wireless Technology

Challenges of Communications Mobility

Location Discovery

Move Detection

Update Signaling

Path (Re)establishment

Full Mobility and the OSI Protocol Stack

Mobility at Layer 2

Mobility at Layers 4—7

Mobility at Layer 3

Combining Mobility Protocols

The Case for Mobile IP


Review Questions

Chapter 2          Understanding Mobile IP

Mobile IP: The Elevator Pitch

Mobile IP Is a Dynamic Routing Protocol…

…Where End Devices Signal Their Own Routing Updates…

…and Dynamic Tunnels Eliminate the Need for Host Route Propagation

Mobile IP: Components

Mobile Node

Home Network and Home Address

Home Agent

Care-of Address

Colocated Care-of Address

Foreign Agent Care-of Address

Foreign Agent

Correspondent Node

Mobile IP Protocol Concepts

Mobile IP Agent Discovery

Location Discovery

Move Detection and Mobile IP Handover Policy

Steady-State Algorithm

New Network Algorithm

Link-State Triggers

Mobile IP Handover

Mobile IP Registration



Service Fields and Bits

Broadcast Support

Simultaneous Bindings


Relevant Address Fields

Registration Reply Codes

Registration Delivery

Mobile IP Handover Other Than Returning Home

Mobile IP Handover Returning Home

Mobile IP Example



Triangle Routing


Review Questions

Chapter 3        Mobile IP Security

Protocol Authentication Extensions

Security Associations


Algorithm and Mode


Replay Protection Methods

Timestamp Replay Protection

Nonces Replay Protection

Mobile Node and Foreign Agent Authentication and Challenge Mechanism

FA Challenge

MN-AAA Authentication

Dynamic Keying

Standards-Based Dynamic Keying

Cisco Dynamic Security Association and Key Distribution

Session Index Extension

Security Association Setup Extension

Domain Extension

Challenge Extension

Authentication Response Extension

Configuration Extensions

Location Privacy


Review Questions

Chapter 4        IOS Mobile IP in the Lab

Building the Baseline Topology

Intermediate System Configuration

Correspondent Node Configuration

Home Agent Configuration

Physical Home Network Configuration

Virtual Home Network Configuration

Mobile Host Configuration

Security Association Configuration

Home Agent Final Configuration

Foreign Agent Configuration

Mobile Node Configuration

Operation and Evaluation/Troubleshooting

Home Agent

Mobile Node


Examining the Routing Table

Alternative Topologies

Single-Router Topology

Other Options for Single-Router Topology


Review Questions

Chapter 5          Campus Mobility: Client-Based Mobile IP

Campus Mobility Model

Storing Security Associations in AAA



Cisco Zero Configuration Client

Home Agent Redundancy

Configuration Commands

Active-Standby Home Agent Configuration

Peer-Peer Home Agent Configuration

When to Use Peer-Peer Home Agent Redundancy


Review Questions

Chapter 6          Metro Mobility: Client-Based Mobile IP

Metro Mobility Model

Reverse Tunneling

Reverse-Tunnel Delivery Style

Reverse-Tunnel Signaling

Reverse-Tunnel Configuration

Tunnel Path MTU

Impact of Network Address Translation

NAT Traversal UDP Tunneling

NAT on the Home Agent

Mobile IP NAT Configuration

Configuration on the Home Agent

Configuration on the FA

VPN Integration

IPSec and Mobile IP

Mobile IP over IPSec over Mobile IP

Resource Revocation

Resource Revocation Overview

Revocation Support Extension and Messages

Registration Revocation Example

Registration Revocation Configuration

Bringing It All Together Through an Example

Evaluating the Metro Mobility Example


Review Questions

Chapter 7          Metro Mobility: Cisco Mobile Networks

Mobile Router

Mobile Networks (Static or Dynamic)

Configuration of Mobile Router and Its Mobile Networks

Mobile Router Service on an Interface

Mobile Router Interface-Level Configuration

Agent Selection and Mobile IP Registration

Routing to and from the Mobile Router

Home Agent Enhancements

Home Agent Configuration for Network Mobility

Priority Home Agent Assignment

Foreign Agent Details

Agent Discovery–Tuning IRDP Options

Local Routing to Mobile Networks

Configuration for Local Routing to Mobile Networks

Mobile Router Redundancy

Asymmetric Links

Configuration Needed for Asymmetric Links

Example of Asymmetric Link Behavior

Colocated Care-of Address Support

Static Colocated Care-of Address

Dynamic Colocated Care-of Address

Behavior Using Colocated Care-of Addresses

Configuration Examples Using Colocated Care-of Addresses

Example One: Mobile Networks with Static Colocated Care-of Address Only

Example Two: Mobile Networks with Dynamic CCoA

Example Three: Mobile Networks with Dynamic CCoA Only

Quality of Service

IPSec and the Mobile Router


Review Questions

Chapter 8          Deployment Scalability and Management

Management of the Mobile Nodes Home Address

Virtual Networks

Static Home Addressing Without NAI

Dynamic Home Address Assignment

Fixed Addressing on the Command-Line Interface (CLI)

Local Pool Address Assignment

DHCP-Based Address Assignment


AAA Address Assignment

AAA-Based Local Pool Selection

AAA-Assigned DHCP Server

Static Home Addressing with NAI

Local Authorization of Static Home Addresses

AAA Authorization of Static Home Addresses

Scaling Issues

Building a Call Model

Number of Nodes

Frequency of Mobility

Amount of Data Traffic

Number of Tunnels

An Example Call Model

Network Management

RFC 2006 Management Information Base (MIB)

Cisco Enterprise MIB

Objects Matching the Call Model

System Log Messages

Common Troubleshooting Issues

Path MTU Discovery

Reverse Path Forwarding Checks

Tunnel Transit

Security Association Incompatibilities


Review Questions

Chapter 9          A Look Ahead

Mobile IP and Public Access Networks

Public Wireless LAN

Cdma2000 Technology

GSM Technology

FLASH-OFDM Technology

Cisco SWAN and Mobile IP

AAA-Based Dynamic Key Generation

Mobile IPv6

Protocol Operation

Route Optimization (Return Routability) in Mobile IPv6

Mobile IPv6 Messaging

Differences Between Mobile IPv4 and Mobile IPv6

Transition to Mobile IPv6

Lessons Learned

Network Access Identifier

Authentication Option


Hierarchical Mobile IPv6 (HMIPv6)

Fast Mobile IP



Review Questions

Appendix A               Answers to Review Questions

Appendix B            IOS Mobile IP: Supported SNMP MIBs


Appendix B
Please be sure to view the figures at a minimum of 100%.

Figure B-1 (PDF)
Figure B-1 (JPG)

Figure B-2 (PDF)
Figure B-2 (JPG)


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