From: Tim Hockin <thockin@hockin.org>
To: Colin Paton <colin.paton@etvinteractive.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Natsemi ethernet 'cable magic' fix can cause problems
Date: Thu, 13 May 2004 10:03:58 -0700 [thread overview]
Message-ID: <20040513170358.GA19426@hockin.org> (raw)
In-Reply-To: <1084444503.4548.141.camel@colinp>
On Thu, May 13, 2004 at 11:35:03AM +0100, Colin Paton wrote:
> The problem was strange - about 30% packet loss was experienced during
> pings. Moving the box to a different ethernet wall outlet (but still
> using the same port on the switch) cured the problem. The problem
> therefore appeared to be cable dependant.
>
> It would appear that the call to 'do_cable_magic()' in
> drivers/net/natsemi.c causes the problem to occur.
>
> It looks as though this was added in to actually *fix* such problems...
> but in our case it made things worse.
I'm the responsible party on that one. do_cable_magic() was a direct
result of a significant amount of work with National's engineers to
root-cause some major problems we had had.
If I recall, the problem we experienced was when the cable was "short"
(where short was < 30m, I think). What can you tell me about your cabling
setup?
Willing to test? Ping me back.
next prev parent reply other threads:[~2004-05-13 17:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-13 10:35 Natsemi ethernet 'cable magic' fix can cause problems Colin Paton
2004-05-13 17:03 ` Tim Hockin [this message]
2004-07-31 14:51 ` Marcelo Tosatti
2004-07-31 18:11 ` Tim Hockin
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