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Date: Tue, 22 May 2007 18:36:47 +0900 (JST) From: YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@...ux-ipv6.org> To: dada1@...mosbay.com Cc: webmaster@...eraudio.de, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, yoshfuji@...ux-ipv6.org Subject: Re: TCP_MD5 and Intel e1000 In article <20070522105738.f03cb83b.dada1@...mosbay.com> (at Tue, 22 May 2007 10:57:38 +0200), Eric Dumazet <dada1@...mosbay.com> 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. --yoshfuji - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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