On Tue, 10 Sep 2002 15:43:55 +1200, Franck Martin <Franck@sopac.org> said: > The backbone uses PIM because that's what cisco has implemented (in short). That's at least a gross oversimplification. There are fundamental scaling problems with DVMRP, such as its use of "flood and prune" and a RIP-like single-domain routing protocol. -- Simon.