RE: [Xen-users] offload issues

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

> Hi,
> 
> I've got a network issue.  I can serve PXE (dhcp & tftp) from a guest, but
> FTP/HTTP/NFS doesn't work, although I can list the files, I can't
> upload/download them without corrupting them.

So the files are the right size but a 'sum' gives different values?

> I'm using XEN4 & slackware64
> dom0.  I tryed XEN3 RHEL5 domU and XEN4 netbsd-current domU.  Both have the
> same behavior.  I'm hearing it's probably caused by some network offloading
> setting.
> 
> # ethtool -k peth0
> Offload parameters for peth0:
> rx-checksumming: on
> tx-checksumming: on
> scatter-gather: on
> tcp-segmentation-offload: on
> udp-fragmentation-offload: off
> generic-segmentation-offload: on
> generic-receive-offload: off
> large-receive-offload: off
> 
> Note. ftp0 is guest's vif
> # ethtool -k ftp0
> Offload parameters for ftp0:
> rx-checksumming: on
> tx-checksumming: on
> scatter-gather: on
> tcp-segmentation-offload: on
> udp-fragmentation-offload: off
> generic-segmentation-offload: on
> generic-receive-offload: off
> large-receive-offload: off
> 
> dom0's network seems to work fine so I probably only need to disable
> offloading on the vifs.  Anyway I get this error on both,
> 
> # ethtool -K ftp0 rx off
> Cannot set device rx csum settings: Operation not supported
> 
> # ethtool -K ftp0 rx off
> Cannot set device rx csum settings: Operation not supported
> 

Is that second one a typo in the email? It's the same interface as the first...

Try disabling the offload in the DomU instead of the Dom0. If that doesn't work 
try disabling it on the bridge interface.

James

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