[libvirt-users] VM: Unable to enable scatter-gather / tx-checksumming / tcp-segmentation offload

[Michal Privoznik]

On 5/3/19 10:19 AM, Harsh Gondaliya wrote:
> In my Linux VM, I am unable to change scatter-gather / tx-checksumming /
> TCP-segmentation offload features by ethtool command. I am using virtio nic
> with vhostuser port backend.
> It shows me an error:
> Cannot change tx-checksumming
> Cannot change scatter-gather
> Cannot change tcp-segmentation offload
> Could not change any device features

You need to enable those in domain XML:

https://libvirt.org/formatdomain.html#elementsDriverBackendOptions

> 
> Ony running command ethtool -k ens3, I get the following:
> [image: image.png]

Oh¸ it's way better to post this as a text rather than image. Some of us 
use text clients to read e-mails.

Michal