Mobile%20IP%20Regional%20Registration

1
Mobile IP Regional Registration

• Ashutosh Sharma
• CS401A
• Spring 2002

2
Mobile IP Regional Registration

• Agent Advertisement
• - FA must include its Network Access Identifier
  (NAI) in agent advertisement message.
• - By comparing FA NAI with the domain part of
  its on NAI, MN determines whether it is in home
  domain.

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Signaling

4
Signaling

• The complete signaling cycle
• HHRAMRHAR HAA AMA HHA
• HHR HA handover request
• AMR AA Mobile Node request
• HAR Home-Agent-MIP-Request
• HAA Home-Agent-MIP-Answer
• AMA AA-Mobile-Node-Answer
• HHA HA handover answer

5
Home Agent Handover

• Registration with old HA
• - Home Address the old home address
• - HA address the old HA address
• - COA Care of address

6
Home Agent Handover

• Mobility Agent

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Mobility Agent
8
HA handover
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HA handover

1. MN sends HHR message to the advertising FA
2. FA sends AMR message to the AAA server
3. AAA server assigns a MA for the MN and sends HAR
   message to the MA
4. MA sends back HAA message to the AAA server
5. The AAA server sends back AMA message to the FA
6. The FA sends HHA message to the MN
7. The MN sends the home registration with the old
   HA to the MA
8. The MA forwards the home registration request to
   the old HA
9. The MN performs DNS update with the server of the
   MN

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Migration of the MN after HA Handover
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Further Migration of the MN after HA handover

• MN sends regional registration request to the MA
• MA relays the registration request to the GFA
• MN migrates again and registers the new COA with
  the MA for the new home address and all the
  previous home addresses by specifying the
  Previous Home Address Extension in the
  registration request

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Reference

• Gustafsson et al, Mobile IP Regional
  Registration, IETF Internet Draft (Work in
  Progress expires Sept 6, 2001)