linux-kernel - Re: How to find a sick router with 2.6.17+ and tcp_window

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Message-ID: <20060819164218.GG9537@charite.de>
Date:	Sat, 19 Aug 2006 18:42:18 +0200
From:	Ralf Hildebrandt <Ralf.Hildebrandt@...rite.de>
To:	linux-kernel@...r.kernel.org
Subject: Re: How to find a sick router with 2.6.17+ and tcp_window_scaling enabled

* Mark Reidenbach <m.reidenbach@...rytruckjob.com>:
> I had made an earlier post concerning very poor network performance 
> after upgrading to 2.6.17 and later kernels.  The solution provided by 
> the e1000 developers was that it was in fact a change to the default tcp 
> window scaling settings and that there was a router somewhere between my 
> computer and its destination.

Are you looking for a traceroute-/mtr-like tool that sends specially
crafted packets and finally comes up with a message like "the router
between x and y is broken"?

-- 
Ralf Hildebrandt (i.A. des IT-Zentrums)         Ralf.Hildebrandt@...rite.de
Charite - Universitätsmedizin Berlin            Tel.  +49 (0)30-450 570-155
Gemeinsame Einrichtung von FU- und HU-Berlin    Fax.  +49 (0)30-450 570-962
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