In a previous email I said (more or less) Stateless Multicast is independent from the scalablity issue and that was in view of my older Cascade Tree of p2p-relays proposal. But now I become fully aware of the mutual help. Cartainly, I was always aware that the receiving hosts can't be the relaying nodes (uploading is too slow), instead it must be something close to them: the egress router, or the ETR (which has a correspondent node in TARA however with a routable and not just mappable token). Is cascade tree routing (cascade tree of p2p's) itself scalable ? Oh yes. Just claim the scale ratio, i.e just claim the needed cascade degree! The second message is: any tree of p2p's will benefit if relay nodes can be identified, no matter whether they have routable or (just) mappable addresses. Heiner
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