Mobile IPv4 Operation The home agent tracks a mobile node location and delivers traffic to the mobile node via tunnel ■Key points ▣Agent discovery Registration,Authentication,Authorization, Accounting Tunnels,Bindings,Datagram Forwarding
Mobile IPv4 Operation ◼ The home agent tracks a mobile node location and delivers traffic to the mobile node via tunnel ◼ Key points Agent discovery Registration, Authentication, Authorization, Accounting Tunnels, Bindings, Datagram Forwarding
Agent discovery This discovery takes place when a mobile node is first turned on or when a mobile node changes network point of attachment ■Advertisement Solicitation
Agent discovery ◼ This discovery takes place when a mobile node is first turned on or when a mobile node changes network point of attachment ◼ Advertisement ◼ Solicitation
Agent advertisement Advertised by mobility agent,target to 224.0.0.1or255.255.255.255 extensions of the Internet Control Message Protocol (ICMP)Router Advertisement message RFC 1256,ICMP Internet Router Discovery Protocol (IRDP)
Agent advertisement ◼ Advertised by mobility agent, target to 224.0.0.1 or 255.255.255.255 ◼ extensions of the Internet Control Message Protocol (ICMP) Router Advertisement message RFC 1256, ICMP Internet Router Discovery Protocol (IRDP)
Type=9 Code =16(Mobile IP) Checksum Number of Addresses Address Entry Size Lifetime Router Address 1 Preference Level 1 Router Address N Preference Level N Extension Type=16 Length Sequence Number Registration Lifetime Flags RESERVED Care-of Address 1 Care-of Address N Flags Registration 阁 Home Agent Foreign Minimal GRE RESERVED Reverse Required (H) Agent(F) Encapsulation Encapsulation Tunneling (M0 (G) (TD
registration lifetime home agent or foreign agent tunnel encapsulation type If the mobility agent is a foreign agent, whether reverse tunneling is supported ▣the foreign agent CoA whether the foreign agent has available capacity to accept new registrations
◼ registration lifetime ◼ home agent or foreign agent ◼ tunnel encapsulation type ◼ If the mobility agent is a foreign agent, whether reverse tunneling is supported the foreign agent CoA whether the foreign agent has available capacity to accept new registrations