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Date: Wed, 25 Jul 2007 15:32:30 -0400 From: Chuck Ebbert <cebbert@...hat.com> To: Siddharth Taneja <siddharth.taneja@...il.com> CC: linux-kernel@...r.kernel.org, Netdev <netdev@...r.kernel.org> Subject: Re: TCP MD5 and Scatter Gather offloading. On 07/25/2007 01:12 PM, Siddharth Taneja wrote: [cc: netdev] > Hello, > > I am using a vanilla 2.6.22.1 kernel and I see the same kind of > problem as had been mentioned some time back on this list > > http://lkml.org/lkml/2007/5/22/45 > > The issue is essentially that with the MD5 option enabled for the > specific TCP connection, the SYN and SYN-ACKS are passed fine and the > connection establishes fine, but the other end (a cisco router) > complains about incorrect MD5 signatures on any other message that is > sent after this. > > Setting the scatter-gather offloading option on the NIC seems to > correct this problem. Recently I had seen a checkin (as a response to > the problem mentioned in the above link) where the TSO option was > turned off to make MD5 work (my kernel has that fix). Is a similar > solution needed here too? > > This is the information about my system: >> uname -a > Linux stdalone 2.6.22.1 #1 SMP Mon Jul 23 20:15:21 PDT 2007 i686 i686 > i386 GNU/Linux > >> ethtool -i eth0 > driver: e1000 > version: 7.3.20-k2 > firmware-version: N/A > bus-info: 0000:01:0a.0 > >> ethtool -k eth0 > Offload parameters for eth0: > rx-checksumming: on > tx-checksumming: on > scatter-gather: off > tcp segmentation offload: off > > Thanks for your help. > > Siddharth > > PS: I would like to be CC'ed on the reply to this email. Thanks. - 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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