[139384] in North American Network Operators' Group
Re: IPv4 Address Exhaustion Effects on the Earth
daemon@ATHENA.MIT.EDU (Michael Proto)
Tue Apr 5 17:59:37 2011
In-Reply-To: <4E3AB9A4-9C60-40BA-B6D2-28DD0CD48557@puck.nether.net>
Date: Tue, 5 Apr 2011 17:59:31 -0400
From: Michael Proto <mike@jellydonut.org>
To: Jared Mauch <jared@puck.nether.net>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Tue, Apr 5, 2011 at 5:38 PM, Jared Mauch <jared@puck.nether.net> wrote:
>
> On Apr 4, 2011, at 4:30 PM, Jim Gettys wrote:
>
>> Note that the paper "Characterizing Residential Broadband Networks" by D=
ischinger, et. al. indicates that a large fraction (in their 2 year old sam=
ple, 30% or so) of broadband head ends are running without RED, and should =
be doing so if at all possible; alternatives are years out by the time they=
are tested and deployed, and operators running without it in congested sys=
tems are inflicting pain on their customers.
>
> Something I've observed is if you are sending data 'upstream' on the cabl=
e modem setup i have (16 down/ 2 up) and you saturate the upstream, the buf=
fering destroys any downstream capability at the same time. =A0I'm not even=
sure where to start diagnosing to explaining this to the carrier involved,=
as this isn't the desired behavior of a "business class" service.
>
> - Jared
>
Isn't this just a case or prioritizing outbound ACKs?
http://www.benzedrine.cx/ackpri.html
-Proto
