Interception Somewhere along normal forwarding path At source ° Any router along path Router to home network Machine on home network(masquerading as mobile host Clever tricks to force packet to particular destination Mobile subnet,-assign mobiles a special address range and have special node advertise route 1-08-07 ecture 21: Wireless Networking
11-08-07 Lecture 21: Wireless Networking 11 Interception • Somewhere along normal forwarding path • At source • Any router along path • Router to home network • Machine on home network (masquerading as mobile host) • Clever tricks to force packet to particular destination • “Mobile subnet” – assign mobiles a special address range and have special node advertise route
Delivery Need to get packet to mobile's current location Tunnels Tunnel endpoint current location Tunnel contents original packets Source routing Loose source route through mobile current location 1-08-07 ecture 21: Wireless Networking 12
11-08-07 Lecture 21: Wireless Networking 12 Delivery • Need to get packet to mobile’s current location • Tunnels • Tunnel endpoint = current location • Tunnel contents = original packets • Source routing • Loose source route through mobile current location
Mobile IP(RFC 2290) ° interception Typically home agent-a host on home network Delivery Typically IP-in-IP tunneling Endpoint -either temporary mobile address or foreign agent Terminology Mobile host(MH), correspondent host(CH), home agent(HA), foreign agent (FA) Care-of-address home address 1-08-07 ecture 21: Wireless Networking 13
11-08-07 Lecture 21: Wireless Networking 13 Mobile IP (RFC 2290) • Interception • Typically home agent – a host on home network • Delivery • Typically IP-in-IP tunneling • Endpoint – either temporary mobile address or foreign agent • Terminology • Mobile host (MH), correspondent host (CH), home agent (HA), foreign agent (FA) • Care-of-address, home address