System Administration Guide: IP Services

Care-of Addresses

Mobile IP provides the following alternative modes for the acquisition of a care-of address:

A Co-located care-of address enables a mobile node to function without a foreign agent. Consequently, a mobile node can use a co-located care-of address in networks that have not deployed a foreign agent.

If a mobile node is using a co-located care-of address, the mobile node must be located on the link that is identified by the network prefix of the care-of address. Otherwise, datagrams that are destined to the care-of address cannot be delivered.