Originally posted by sankt
Actually from what I have read, ( Cisco, Microsoft and other references ), Distributing multicast data through a VPN does not require specially configured routers. The actual VPN software ( or hardware ) determines the ability to distribute Multicast data ( or any protocol for data delivery ).
If you were running on an extended Intranet where you had
total control of the configuration in use it probably could
be fiddled, but once you went out into the wild it's a very
mixed market, and you'd be relying on whatever bit of MBONE
was in place and the other fly in the ointment is that while
some ISP's route multicast very many don't.
Here in the UK the BBC has been running a test multicast
service from their R+D unit, and it works great IF your
ISP enables multicast, but sadly only a handfull of our
UK ISP's do and there seems little enthusiasm by the others
for it's take up, my own ISP being one of these and the
reason I'm still running PeerCast.