Pekka; > The important point is, however, that if the id/loc separation > is done, the source address is not needed by the end-hosts any > more. It is needed in the very first packet flowing in a direction, > and perhaps in the second one, until the id->loc state is verified > and established, but not after that. The Internet is connectionless. TCP is not IP, the Internet Protocol. Masataka Ohta