Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934041AbXEVK4l (ORCPT ); Tue, 22 May 2007 06:56:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757659AbXEVK4a (ORCPT ); Tue, 22 May 2007 06:56:30 -0400 Received: from mail.dbd-breitband.de ([217.188.211.21]:33963 "EHLO dbd-mpx01.dbd-breitband.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754788AbXEVK43 (ORCPT ); Tue, 22 May 2007 06:56:29 -0400 X-Greylist: delayed 1352 seconds by postgrey-1.27 at vger.kernel.org; Tue, 22 May 2007 06:56:28 EDT From: Marc Donner Organization: DBD DeutscheBreitbandDienste To: David Miller Subject: Re: TCP_MD5 and Intel e1000 Date: Tue, 22 May 2007 12:33:25 +0200 User-Agent: KMail/1.9.6 Cc: yoshfuji@linux-ipv6.org, dada1@cosmosbay.com, webmaster@poweraudio.de, linux-kernel@vger.kernel.org, netdev@vger.kernel.org References: <20070522.183647.75785266.yoshfuji@linux-ipv6.org> <20070522.031432.08079709.davem@davemloft.net> In-Reply-To: <20070522.031432.08079709.davem@davemloft.net> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-2022-jp" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200705221233.25858.donner@dbd-breitband.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1299 Lines: 27 On Tuesday 22 May 2007, David Miller wrote: > From: YOSHIFUJI Hideaki / 吉藤英明 > Date: Tue, 22 May 2007 18:36:47 +0900 (JST) > > > In article <20070522105738.f03cb83b.dada1@cosmosbay.com> (at Tue, 22 May 2007 10:57:38 +0200), Eric Dumazet says: > > > > 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? > > > > > > You could try "ethtool -K tx off", and/or other ethtool -K settings > > > > Disabling offloading should help; currently tcp-md5 stack > > blindly copy md5-signature from the first segment > > which is not appropriate for rest of segments. > > It is clear we should disable TSO for sockets making use of TCP-MD5. disabling tso works. thanks - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/