Clive, the addresses riu described in section 3 of the document are allocated by the feed(s) manager. Multicast addressing is supported transparently. Walid Dabbous http://www.inria.fr/rodeo/dabbous INRIA U.R. de Sophia Antipolis | Email : dabbous@sophia.inria.fr 2004, Route des Lucioles BP 93 | Phone : +33 4 92 38 77 18 06902 Sophia Antipolis CEDEX France | Fax : +33 4 92 38 79 78