System Administration Guide: IP Services

Mobile IP State Information

On shutdown, the mipagent daemon stores internal state information in /var/inet/mipagent_state. This occurs only when the mipagent provides services as a home agent. This state information includes the list of mobile nodes that are being supported as a home agent, their current care-of addresses, and remaining registration lifetimes. This state information also includes the security association configuration with mobility agent peers. If the mipagent program is terminated (for maintenance) and restarted, mipagent_state is used to re-create as much of the mobility agent's internal state as possible in an effort to minimize service disruption for mobile nodes that might be visiting other networks. If mipagent_state exists, it is read immediately after mipagent.conf every time mipagent is started or restarted.