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Re: [Xen-devel] Checksumming problem in pv_ops dom0 kernel / netback

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Subject: Re: [Xen-devel] Checksumming problem in pv_ops dom0 kernel / netback
From: "S.H. Verbrugge" <ief@xxxxxxxxx>
Date: Wed, 17 Mar 2010 16:48:48 +0100
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On Wed, Mar 17, 2010 at 01:48:33PM +0100, Stefan Kuhne wrote:
> Am 17.03.2010 13:34, schrieb S.H. Verbrugge:
> Hello,
> > Ever since we switched to a pv_ops dom0 kernel (we were using 2.6.26 
> > xenkernel from Debian repo before, with Xen 3.2),
> > we started to have some problems when attempting to route packets on a domU.
> > 
> > The following message appears in dmesg on the dom0:
> > 
> > "Attempting to checksum a non-TCP/UDP packet, dropping a protocol 1 packet"
> > 
> I know one how has same problem.
> I've a similar Problem.
> I can ping from routing DomU and Dom0 to Internet, but no one else can.
> See also:
> Post " pv_ops and routing DomU" from 10/03/09 on Xen-Devel
> Regards,
> Stefan Kuhne

Yeah, I've seen that. It does not give that much information however.

More specifically, I've tested with two dom0 pv_ops kernels now, and since it's 
reproducable on the latest xen/stable platform, I'm guessing it either has to 
do with vlan'ing or
the tg3 driver , in combination with netback.

I was hoping some Xen developers could shed some light on this.
I already conversed with Jeremy about this, and he pointed me to this mailing 

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