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Message-ID: <4652B227.60404@lemonia.org>
Date: Tue, 22 May 2007 10:04:39 +0100
From: Dunc <dunc@...onia.org>
To: Eric Dumazet <dada1@...mosbay.com>
CC: Marc Donner <webmaster@...eraudio.de>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: TCP_MD5 and Intel e1000
Eric Dumazet wrote:
> On Tue, 22 May 2007 09:33:29 +0200
> Marc Donner <webmaster@...eraudio.de> wrote:
>
>> Hi,
>>
>> I have tried to set up quagga with tcp-md5 support from kernel. All seems ok
>> with a intel e100 NIC, but as i testetd with a intel e1000 NIC the tcp
>> packets have an invalid md5 digest.
>> If i run tcpdump on the mashine the packets are generated, it shows on the
>> outgoing interface invalid md5 digests.
>> Are there known issues about tcp-md5 and e1000 NICs?
>>
>
> Hi Marc
>
> CCed netdev as more appropriate to discuss about network stuff.
>
> Would be nice if you sent some tcpdump samples to share with us, and tell us
> which exact linux version you tried.
>
> You could try "ethtool -K tx off", and/or other ethtool -K settings
>
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I had this with e1000 NICs and it was just because I had TSO on.
It is disabled with ethtool as Eric suggests
Cheers,
Dunc
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