[145360] in North American Network Operators' Group
Re: passive bandwidth estimation
daemon@ATHENA.MIT.EDU (Murtaza)
Thu Oct 6 00:32:07 2011
In-Reply-To: <E603EB75-45F6-478F-83E1-8E704589122E@ukbroadband.com>
Date: Thu, 6 Oct 2011 15:29:39 +1100
From: Murtaza <leothelion.murtaza@gmail.com>
To: Leigh Porter <leigh.porter@ukbroadband.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
I am more interested in getting an "Available Bandwidth" estimator. Due to
this available bandwidth, I am interested in congestion window. As whenever
congestion window goes to half it means the data rate has gone to its upper
limit. I want to use this particular property of congestion window to
calculate bandwidth.
Any idea how can one do bandwidth measurement based on this?
Thanks a lot,
Ghulam
On Wed, Oct 5, 2011 at 7:18 PM, Leigh Porter
<leigh.porter@ukbroadband.com>wrote:
> I used a passive TCP RTT calculator and TCP re-trans monitor to guess the
> conditions to a host or group of hosts with some success. I the. Derived the
> network "weather" from this and it worked pretty well to dynamically tune
> DPI box policing for wireless networks.
>
> It also makes cool graphs. Especially if you add other parameters and do it
> all in various colours.
>
> --
> Leigh
>
>
> On 5 Oct 2011, at 07:41, "Murtaza" <leothelion.murtaza@gmail.com> wrote:
>
> > Hi everyone,
> > I want to do passive available bandwidth measurement. I was just
> wandering
> > what tools/techniques people are generally using these days. And is it a
> > good idea to use congestion window as parameter.
> > Ghulam
> >
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