1. Autumn 2000John Kristoff1 Computer Networks Mobile IP

2. Autumn 2000John Kristoff2 Motivation With the advent of popular wireless technologies (e.g. cellular phones), a wireless IP device moving between networks means that the host ’ s address must change or that routers must propagate host specific routes across the entire internetwork. Neither of these solutions work well, enter Mobile IP.

3. Autumn 2000John Kristoff3 Mobile IP Basics ÑHome Address ÑMobile/Roaming IP Address ÑHome Agent ÑHome Network ÑForeign Network ÑForeign Agent (care-of address)

4. Autumn 2000John Kristoff4 Usage ÑRegistration ÑEncapsulation ÑRouting ÑTriangular routing ÑCrossing paths ÑPerformance

5. Autumn 2000John Kristoff5 Mobile IP Illustrated

6. Autumn 2000John Kristoff6 Challenges ÑPrivacy ÑNAT (again!) ÑTriangular routing exists as long as there are legacy IPv4 stacks deployed ÑRoutes aren't the only thing that change ÑMany people don't see this happening