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X-At: Department of Electrical Engineering, The University of Edinburgh
Date: Sat, 28 Apr 2001 23:11:51 +0100
From: Michael F Gordon <Michael.Gordon@ee.ed.ac.uk>
To: David Lang <david.lang@digitalinsight.com>
Cc: Garett Spencley <gspen@home.com>,
        Michael F Gordon <Michael.Gordon@ee.ed.ac.uk>,
        linux-kernel@vger.kernel.org
Subject: Re: 2.4.4 breaks dhcpcd with Realtek 8139
Message-ID: <20010428231151.A11841@ee.ed.ac.uk>
In-Reply-To: <Pine.LNX.4.30.0104281142520.3423-100000@localhost.localdomain> <Pine.LNX.4.33.0104281126570.16046-100000@dlang.diginsite.com>
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In-Reply-To: <Pine.LNX.4.33.0104281126570.16046-100000@dlang.diginsite.com>; from david.lang@digitalinsight.com on Sat, Apr 28, 2001 at 11:29:15AM -0700
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On Sat, Apr 28, 2001 at 11:29:15AM -0700, David Lang wrote:
> what sort of switch are you plugged into? some Cisco switches have a
> 'feature' that ignores all traffic from a port for X seconds after a
> machine is plugged in / powered on on a port (they claim somehting about
> preventing loops) it may be that the new kernel now boots up faster then
> the old one so that the DHCP request is lost in the switch, a few seconds
> later when you do it by hand the swich has enabled your port and
> everything works.

I'm plugged in to a cable modem, with the DHCP server at the ISP.  The
server requires the MAC address to be registered, so sending the DHCP
request with a different MAC address could cause the symptoms.  I doubt
it's a timing problem - replacing the 8139 driver with the 2.4.3 version
but otherwise using the distributed 2.4.4 makes DHCP work as expected.


Michael Gordon
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