Re: How to find a sick router with 2.6.17+ and tcp_window_scaling enabled

From: Ralf Hildebrandt
Date: Sat Aug 19 2006 - 12:44:58 EST

* Mark Reidenbach <m.reidenbach@xxxxxxxxxxxxxxxxx>:
> 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@xxxxxxxxxx
Charite - Universitätsmedizin Berlin Tel. +49 (0)30-450 570-155
Gemeinsame Einrichtung von FU- und HU-Berlin Fax. +49 (0)30-450 570-962
IT-Zentrum Standort CBF send no mail to spamtrap@xxxxxxxxxx
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