LOL, no i havent, but as i said the Multicast Janet network runs a good part of it's Multicast/infrastructure over all the VM core network and has done for a long time now, so i assumed that someone in core networking knows a thing or too about that, to keep it flowing, or did before they got booted perhaps?
all the worlds ISP grade routers and related kit can all do it OC, as IP Multicast is as enbeded as the Unicast protocol, they were made to compliment each other at the time, as was IP broadcast but i wont go there
.
the "Mbone" was good
, no real innovation today springing from that work, and thats a shame.
if anyones intersted PIM
http://www.dataconnection.com/multicast/pimprotocol.htm