[100346] in North American Network Operators' Group
Re: Comcast blocking p2p uploads
daemon@ATHENA.MIT.EDU (Andy Davidson)
Mon Oct 22 05:33:41 2007
In-Reply-To: <20071021002708.GA49132@ussenterprise.ufp.org>
Cc: nanog@nanog.org
From: Andy Davidson <andy@nosignal.org>
Date: Mon, 22 Oct 2007 10:17:04 +0100
To: Leo Bicknell <bicknell@ufp.org>
Errors-To: owner-nanog@merit.edu
On 21 Oct 2007, at 01:27, Leo Bicknell wrote:
> But back the the original premise. If say, Linux is being distributed
> both from a central web site, and via P2P:
> 1) Central web site. All but the one ISP with the web site will
> have the traffic going over peering or worse transit, and will
> often be carrying them thousands of miles from the central point.
> 2) P2P. Has a good chance at least some seeders will be on the same
> network, avoiding peering and transits for some fraction of the
> traffic. Has a good chance the seeders are closer to the user
> than the web site, perhaps even on the same cable segment.
In the UK at least, option 1) is financially more favourable for
ISPs, since the data flow is
vendor -> transit -> last mile -> end user,
rather than
end user -> last mile -> last mile -> end user.
The last mile is where all the costs are.
Andy
