[140073] in North American Network Operators' Group
Re: How do you put a TV station on the Mbone? (was: Royal Wedding...)
daemon@ATHENA.MIT.EDU (Jared Mauch)
Fri Apr 29 20:43:38 2011
From: Jared Mauch <jared@puck.nether.net>
In-Reply-To: <20110429194440.36991.qmail@joyce.lan>
Date: Fri, 29 Apr 2011 20:42:49 -0400
To: "John Levine" <johnl@iecc.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Apr 29, 2011, at 3:44 PM, John Levine wrote:
>> Delivering multicast to end users is fundamentally not hard. The
>> biggest issue seems to be with residential CPE (pretty much the same
>> problem as IPv6, really).
>=20
> Well, more than that, since I don't really want my DSL pipe saturated
> with TV that I'm not watching, you need some way for the CPE to tell
> the ISP "send me stream N"
There are CPEs that do this, but some don't do it on a public IP =
network.
Additionally, considering the state of the home CPE market and how =
horrible it is, I doubt it will get better anytime soon. You have to =
look no further than the copious numbers of "IPv6 Ready" devices on the =
shelves in stores today. Oh, and the fact that the NAT on the v4 side =
breaks multicast.
> I suppose with some sort of spanning three thing it'd even be =
posssible
> to do that at multuple levels, so the streams are only fed to people
> who have clients for it.
This is what IGMP+PIM already do, sometimes with layer-2 support from =
switches, sometimes not, all depends on your topology.
- Jared=
