Understanding Mobile IP Features and Standards
Explore the features of Mobile IP like home agents, foreign agents, agent discovery, and registration process. Understand the three components of the standard and how indirect routing and encapsulation work in mobile networks.
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Presentation Transcript
Mobile IP RFC 3344 has many features we ve seen: home agents, foreign agents, foreign-agent registration, care-of-addresses, encapsulation (packet-within-a-packet) three components to standard: indirect routing of datagrams agent discovery registration with home agent Wireless and Mobile Networks 7-1
Mobile IP: indirect routing foreign-agent-to-mobile packet packet sent by home agent to foreign agent: a packet within a packet dest: 128.119.40.186 dest: 79.129.13.2 dest: 128.119.40.186 Permanent address: 128.119.40.186 Care-of address: 79.129.13.2 dest: 128.119.40.186 packet sent by correspondent Wireless and Mobile Networks 7-2
Mobile IP: agent discovery agent advertisement: foreign/home agents advertise service by broadcasting ICMP messages (typefield = 9) 16 0 8 24 type = 9 checksum code = 0 H,F bits: home and/or foreign agent standard ICMP fields router address R bit: registration required type = 16 length sequence # RBHFMGV bits registration lifetime reserved mobility agent advertisement extension 0 or more care-of- addresses Wireless and Mobile Networks 7-3
Mobile IP: registration example visited network: 79.129.13/24 foreign agent COA: 79.129.13.2 home agent HA: 128.119.40.7 mobile agent MA: 128.119.40.186 ICMP agent adv. COA: 79.129.13.2 . registration req. registration req. COA: 79.129.13.2 HA: 128.119.40.7 MA: 128.119.40.186 Lifetime: 9999 identification:714 . COA: 79.129.13.2 HA: 128.119.40.7 MA: 128.119.40.186 Lifetime: 9999 identification: 714 encapsulation format . registration reply HA: 128.119.40.7 MA: 128.119.40.186 Lifetime: 4999 Identification: 714 encapsulation format . registration reply HA: 128.119.40.7 MA: 128.119.40.186 Lifetime: 4999 Identification: 714 . time Wireless and Mobile Networks 7-4
