Home Address Assignment

The mobile node's home address can either be preconfigured, or dynamically allocated by the Mobile IP home agent. If a nonzero home address is preconfigured, the home agent processes the registration request using the home address. If the home address is dynamically allocated, the mobile node submits a nonzero home address and requests the home agent to assign an IP address. The mobile node then uses the address provided by the home agent for subsequent registration requests, until the mobile node is rebooted or the registration expires.

Home address allocation is done by one of the existing AAA back-end address mechanisms, such as:

• By RADIUS
• From an address pool returned by RADIUS
• From a local pool
• By the DHCP server

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