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

[Stefan Kuhne <stefan.kuhne@xxxxxxx>]

Am 18.03.2010 00:25, schrieb James Harper:
Hello,


> This may not be relavant, but I have seen problems with the following
> combination:
> 
> br0:
>  eth0
>  <netback devices>
> 
> br1:
>  eth0.2
>  <netback devices>
> 
> Some (most?) network hardware cannot provide checksum/large send offload
> functions for packets that use vlan tagging, but Linux doesn't quite
> understand that and gets confused, so when such a packet comes off of
> netback and is sent to eth0.2, the LSO/checksum function should be
> performed in software but isn't.
> 
I've no VLAN running.
But i've only a similar problem.

Regards,
Stefan Kuhne

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