Hello; There has been discussion on the list before about the problems caused by placing IP networks on large mobile platforms (i.e., mobile platform internetworking, or MPI). Terry Davis and Will Ivancic are presenting on this to the NEMO WG at the IETF right now; we have created a mailing list and a web site devoted to this. Mailing list information and presentations and documents can be found at http://www.multicasttech.com/mpi/ If you interested, you are welcome to join and contribute. Regards Marshall Eubanks