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Re: [Xen-devel] [PATCH] Fix checksum errors when using network-bridge ov

from [James Dykman]

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Subject:	Re: [Xen-devel] [PATCH] Fix checksum errors when using network-bridge over VLANs
From:	James Dykman <dykman@xxxxxxxxxx>
Date:	Fri, 5 May 2006 10:28:47 -0400
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Jean-Francois Stenuit <jfs@xxxxxxxxx> wrote on 05/05/2006 04:21:28 AM:

> 
> On Thu, 13 Apr 2006 18:29:51 -0400, James Dykman wrote:
> 
> 
> > With this patch, TCP/UDP checksum errors from dom0 are fixed, and 
domUs
> > can use TCP/UDP without turning off TX checksum offload.
> > Normal non-VLAN bridged configs still work fine, tested with xm-test.
> 
> Just a quick question : is there a work-around available without a full 
> recompile of Xen kernels ?
> 

You can use ethtool to turn off the TX checksum offload, so that the 
TCP/UDP protocols
calculate them. In the domUs, and possibly even dom0 (I haven't tried it 
myself):

ethtool -K <ethX> tx off

Jim

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