From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dunc Subject: Re: TCP_MD5 and Intel e1000 Date: Tue, 22 May 2007 10:04:39 +0100 Message-ID: <4652B227.60404@lemonia.org> References: <20070522105738.f03cb83b.dada1@cosmosbay.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: Marc Donner , Linux Kernel Mailing List , "netdev@vger.kernel.org" To: Eric Dumazet Return-path: Received: from tang.lemonia.org ([88.208.192.38]:50876 "EHLO tang.lemonia.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756037AbXEVJni (ORCPT ); Tue, 22 May 2007 05:43:38 -0400 In-Reply-To: <20070522105738.f03cb83b.dada1@cosmosbay.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Eric Dumazet wrote: > On Tue, 22 May 2007 09:33:29 +0200 > Marc Donner 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 > > - > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html 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