How do you put a TV station on the Mbone? (was: Royal Wedding...)

Chris Adams cmadams at
Sat Apr 30 17:34:15 UTC 2011

Once upon a time, Octavio Alvarez <alvarezp at> said:
> So the first user in a router tunes to a multicast stream. Consumption
> for the ISP and all the routers in the chain to the source: same as if
> it were a unicast stream. Then a second user tunes to a multicast
> stream. Cost for the ISP: zero.

How does this affect peering, when some providers want bandwidth ratios
in a certain range?

I can also see how this affects the ISPs providing bandwidth to the
content providers.  In our colo for example, we rate-limit customers to
the paid-for bandwidth at the colo port.  With multicast however, they
could use significantly more bandwidth, because every router in our
network could potentially send the stream to many ports.
Chris Adams <cmadams at>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.

More information about the NANOG mailing list