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

Octavio Alvarez alvarezp at
Sat Apr 30 20:41:14 UTC 2011

On Sat, 30 Apr 2011 10:34:15 -0700, Chris Adams <cmadams at> wrote:

> 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.

You are billing your content provider for the bandwidth consumption at his
port not because you intend to bill him for the bandwidth of content
provided, but for the bandwidth of content delivered to the end user! The
end-user is ALREADY PAYING for that bandwidth!

Something is *really* broken there.


Twitter: @alvarezp2000 -- @alvarezp

More information about the NANOG mailing list