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CCRI J. Bernardini 1 Wireless Mobile IP CCRI ENGR 1500.

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Presentation on theme: "CCRI J. Bernardini 1 Wireless Mobile IP CCRI ENGR 1500."— Presentation transcript:

1 CCRI J. Bernardini 1 Wireless Mobile IP CCRI ENGR 1500

2 CCRI J. Bernardini 2 Mobile IP Components MN – Mobile Node (VMD) FA – Foreign Agent (MAP) HA – Home Agent (MAP) AAP – Authoritative Access Point MAP – Mobile IP Access Point (MN) VMD – Visiting Mobile Device (MN) COA – Care-of-Address HAN – Home Agent Network FAN – Foreign Agent Network CN – Correspondent Node

3 CCRI J. Bernardini 3 Subnets and Mobile IP Subnets provide many advantages: –make network management easier –Subnets reduce broadcasts –Subnets provide security –Subnets use subnet masks ( ) WLAN subnets creates problems for roaming devices Example: – /24 can seamlessly roam within x /24 –Note /24 is a subnet mask – /24 can not seamlessly roam within x /24 without changing the IP address Mobile IP offers a solution – can roam as a guest on the x network

4 CCRI J. Bernardini 4 Mobile IP Devices Visiting Device –Some APs support Mobile IP and Visiting devices Mobile IP Access Point –Performs all Mobile IP services Home Agent –Visiting devices home router –Tunnels packets from visited network to visiting device Authoritative Access Point (AAP) –Uses a subnet map to track all home visiting devices Foreign Agent –A router the is the attachment point for visiting devices –Tunnels packets to the Home Agent for the visiting device

5 CCRI J. Bernardini 5 Mobile IP Process - Discovery 1- Mobile Node (MN) gets address from Home Agent (HA) 2- MN moves to Foreign Agent (FA ) network 3- MN discovers FA or solicits for an agent. 4- MN gets Care-of-Address (COA) from FA Mobile IP 3-Step Process 1-Discovery 2-Registration 3-Tunneling MN – Mobile Node FA – Foreign Agent HA – Home Agent

6 CCRI J. Bernardini 6 Mobile IP Process - Registration 5- MN send registration request to FA 6- FA checks request, adds MN to pending list 7- FA relays request to HA 8- HA checks request and creates a mobile binding 9- HA sends registration reply to FA 5 Mobile IP 3-Step Process 1-Discovery 2-Registration 3-Tunneling FA checks reply and adds MN to visitor list and relays reply to MN 11-FA creates a routing entry and tunnel to HA 12- MN check reply and creates a tunnel to the HA Through the FA MN – Mobile Node FA – Foreign Agent HA – Home Agent CN – Correspondent Node

7 CCRI J. Bernardini 7 Mobile IP- Tunneling and Packet Forwarding MN – Mobile Node FA – Foreign Agent HA – Home Agent CN – Correspondent Node COA- Care-of-Address Correspondent Node (CN) sends packet to MN and is routed to HA 14- HA intercepts packets and tunnels to the FA using the COA 15- FA relays the packets to the MN 14 15

8 CCRI J. Bernardini 8 Mobile Node Movement


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