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Groups > comp.os.linux.networking > #692
| From | Billy Mays <noway@nohow.com> |
|---|---|
| Newsgroups | comp.os.linux.networking |
| Subject | Re: Unusual Packet Capture Between Linux and Windows |
| Date | 2011-10-11 20:13 -0400 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <j72m42$h95$1@speranza.aioe.org> (permalink) |
| References | <j6nam6$a23$1@speranza.aioe.org> <j6ub02$76c$2@localhost.localdomain> <j71o1v$5vm$1@speranza.aioe.org> <j727of$ead$1@localhost.localdomain> |
On 10/11/2011 3:08 PM, Andy Furniss wrote: > Billy Mays wrote: > >> eth1 is the one that seems to be having the problem, while eth0 is an >> interface I know to work (just to clarify the output below). I ran >> ethtool on both of my interfaces and included only the differences >> between them. I must admit I am not familiar with specifics of what they >> do: >> >> Offload parameters for eth1: >> >> tx-checksumming: on >> scatter-gather: on >> tcp-segmentation-offload: on >> generic-segmentation-offload: on >> >> >> Offload parameters for eth0: >> >> tx-checksumming: off >> scatter-gather: off >> tcp-segmentation-offload: off >> generic-segmentation-offload: off >> >> >> >> Which of these are safe to change? Would any of these possibly be the >> source of my error? > > I would try > > ethtool -K eth1 tso off > > tcp-segmentation-offload means that you nic is doing some of the work to > do with tcp that the kernel netcode usually does. This could be why you > see different dumps as tcpdump will be seeing the packets before the nic > has segmented them. > > It should be safe to turn off the others (tx sg gso) if you need to test > further. > > Trying to disable anything but gso seems to be disabled: root@af:/# ethtool -K eth1 tso off Cannot set device tcp segmentation offload settings: Operation not supported root@af:/# ethtool -K eth1 gso off root@af:/# ethtool -K eth1 rx off Cannot set device rx csum settings: Operation not supported root@af:/# ethtool -K eth1 tx off Cannot set device tx csum settings: Operation not supported How can these settings be turned on, but not able to be turned off? Would it be easier to just spend $20 and get a new nic? Bill
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Unusual Packet Capture Between Linux and Windows Billy Mays <noway@nohow.com> - 2011-10-07 12:51 -0400
Re: Unusual Packet Capture Between Linux and Windows J G Miller <miller@yoyo.ORG> - 2011-10-07 17:08 +0000
Re: Unusual Packet Capture Between Linux and Windows Billy Mays <noway@nohow.com> - 2011-10-07 13:23 -0400
Re: Unusual Packet Capture Between Linux and Windows Rick Jones <rick.jones2@hp.com> - 2011-10-07 19:04 +0000
Re: Unusual Packet Capture Between Linux and Windows Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2011-10-07 22:39 +0300
Re: Unusual Packet Capture Between Linux and Windows Billy Mays <noway@nohow.com> - 2011-10-11 12:31 -0400
Re: Unusual Packet Capture Between Linux and Windows Andy Furniss <spam@andyfurniss.entadsl.com> - 2011-10-08 14:00 +0100
Re: Unusual Packet Capture Between Linux and Windows Andy Furniss <spam@andyfurniss.entadsl.com> - 2011-10-10 09:39 +0100
Re: Unusual Packet Capture Between Linux and Windows Billy Mays <noway@nohow.com> - 2011-10-11 11:40 -0400
Re: Unusual Packet Capture Between Linux and Windows Andy Furniss <spam@andyfurniss.entadsl.com> - 2011-10-11 20:08 +0100
Re: Unusual Packet Capture Between Linux and Windows Billy Mays <noway@nohow.com> - 2011-10-11 20:13 -0400
Re: Unusual Packet Capture Between Linux and Windows Andy Furniss <spam@andyfurniss.entadsl.com> - 2011-10-13 10:52 +0100
Re: Unusual Packet Capture Between Linux and Windows Billy Mays <noway@nohow.com> - 2011-10-19 10:29 -0400
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