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

[George Bonser <gbonser () seven com>]

> From: Jay Ashworth 
> Sent: Friday, April 29, 2011 10:13 AM
> To: NANOG
> Subject: How do you put a TV station on the Mbone? (was: Royal
> Wedding...)
>
> ----- Original Message -----
> > From: "Ryan Malayter" 

> > On Apr 28, 11:14 pm, Jay Ashworth wrote:
> > > > (cough)multicast(cough)
> > >
> > > But... but... how do we count the viewers, then?
> >
> > Isn't the real problem with global multicast: "How do we ultimately
> > bill the broadcaster for all that traffic amplification that happened
> > *inside* every other AS?" It seems like you'd have to do per-packet
> > accounting at every router, and coordinate billing/reporting amongst
> > all providers that saw those packets.
>
> See, now, I expected to hear that objection.
>
> Internet engineers are prone to try to solve this problem in favor of
> the viewer, and their networks -- with their networks winning in case
> of a push.

Should be easy enough on your subscriber ports to use igmp to see who has subscribed to which groups, shouldn't it?  
Just log igmp changes and there's your accounting.