Mobile Networking Through Mobile IP Course: COSC541 Instructor: Prof. Mort Anvari Student: Yongliang Shen Date: 06/8/2002

Outline of This Presentation What is an Mobile IP ? Why use the Mobile IP ? HOW MOBILE IP WORKS ?

Describe the Mobile IP… Mobile IP, then, is best understood as the cooperation of three separable mechanisms: Discovering the care-of address; Registering the care-of address; Tunneling to the care-of address.

Discovering the Care-of Address Mobile IP uses two IP addresses: a fixed home address and a care-of address that changes at each new point of attachment

advertisement functions perform as following: allows for the detection of mobility agents; lists one or more available care-of addresses; informs the mobile node about special features provided by foreign agents, for example, alternative encapsulation techniques; lets mobile nodes determine the network number and status of their link to the Internet; and lets the mobile node know whether the agent is a home agent, a foreign agent, or both, and therefore whether it is on its home network or a foreign network.

CHANGES WITH IP VERSION 6 . Route Optimization . Security . Source Routing

A firewall is a line of Internet’s defense a. A Protection Why use the firewalls? A firewall is a line of Internet’s defense a. A Protection -- A firewall has ability to filter insecure -- Services that will be reduce risks to the sites on the internet -- Will pass only selected protocols

ONGOING WORK AND OPEN QUESTIONS Problems Facing Mobile IP . Routing inefficiencies . Security issues . Ingress filtering . User perceptions of reliability . Issues in IP addressing Current Development Efforts

CONCLUSION Just Try Doing It!