Mobile IP Administration Guide

Mobile IP State Information

Upon shutdown, the mipagent daemon stores internal state information in /var/inet/mipagent_state. This happens only when the mipagent provides services as a home agent. This state information includes the list of mobile nodes being supported as a home agent, their current care-of addresses, and remaining registration lifetimes. If the mipagent program is terminated (for maintenance) and restarted, mipagent_state is used to recreate 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.