Chapter 27 Mobile IP
CONTENTS <ul><li>ADDRESSING </li></ul><ul><li>AGENTS </li></ul><ul><li>THREE PHASES </li></ul><ul><li>AGENT DISCOVERY </li...
ADDRESSING 27.1
The IP addresses are designed  to work with stationary  hosts because part of the address  defines the network to  which t...
Figure  27-1 Host address and care-of address
Mobile IP has two addresses  for a mobile host:  one home address and one care-of address.  The home address is permanent;...
AGENTS 27.2
Figure  27-2 Home agent and foreign agent
When the mobile host and  the foreign agent are the same,  the care-of address is  called a co-located  care-of address.
THREE PHASES 27.3
Figure  27-3 Remote host and mobile host communication
AGENT DISCOVERY 27.4
Figure  27-4 Agent advertisement
Mobile IP does not use a new packet  type for agent advertisement;  it uses the router  advertisement packet of ICMP,  and...
Mobile IP does not use a new packet  type for agent solicitation; it uses the router solicitation  packet of ICMP.
REGISTRATION 27.5
Figure  27-5 Registration request and reply
Figure  27-6 Registration request format
Figure  27-7 Registration reply format
A registration request or reply  is sent by  UDP using the  well-known port 434.
DATA  TRANSFER 27.6
Figure  27-8 Data transfer
The movement of the  mobile host is transparent  to the rest of the Internet.
INEFFICIENCY IN  MOBILE IP 27.7
Figure  27-9 Double crossing
Figure  27-10 Triangle routing
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Ch27

  1. 1. Chapter 27 Mobile IP
  2. 2. CONTENTS <ul><li>ADDRESSING </li></ul><ul><li>AGENTS </li></ul><ul><li>THREE PHASES </li></ul><ul><li>AGENT DISCOVERY </li></ul><ul><li>REGISTRATION </li></ul><ul><li>DATA TRANSFER </li></ul><ul><li>INEFFICIENCY IN MOBILE IP </li></ul>
  3. 3. ADDRESSING 27.1
  4. 4. The IP addresses are designed to work with stationary hosts because part of the address defines the network to which the host is attached.
  5. 5. Figure 27-1 Host address and care-of address
  6. 6. Mobile IP has two addresses for a mobile host: one home address and one care-of address. The home address is permanent; the care-of address changes as the mobile host moves from one network to another.
  7. 7. AGENTS 27.2
  8. 8. Figure 27-2 Home agent and foreign agent
  9. 9. When the mobile host and the foreign agent are the same, the care-of address is called a co-located care-of address.
  10. 10. THREE PHASES 27.3
  11. 11. Figure 27-3 Remote host and mobile host communication
  12. 12. AGENT DISCOVERY 27.4
  13. 13. Figure 27-4 Agent advertisement
  14. 14. Mobile IP does not use a new packet type for agent advertisement; it uses the router advertisement packet of ICMP, and appends an agent advertisement message.
  15. 15. Mobile IP does not use a new packet type for agent solicitation; it uses the router solicitation packet of ICMP.
  16. 16. REGISTRATION 27.5
  17. 17. Figure 27-5 Registration request and reply
  18. 18. Figure 27-6 Registration request format
  19. 19. Figure 27-7 Registration reply format
  20. 20. A registration request or reply is sent by UDP using the well-known port 434.
  21. 21. DATA TRANSFER 27.6
  22. 22. Figure 27-8 Data transfer
  23. 23. The movement of the mobile host is transparent to the rest of the Internet.
  24. 24. INEFFICIENCY IN MOBILE IP 27.7
  25. 25. Figure 27-9 Double crossing
  26. 26. Figure 27-10 Triangle routing

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