[libvirt-users] Question regarding using multiple physical functions inside a network pool.

[Michal Privoznik]

On 7/12/19 3:44 PM, Mohamed, Faris wrote:
> Hello,
> 
> I was planning on adding multiple physical functions using the built in SR-IOV features offered by libvirt to a create a bigger pool of virtual functions using the
> 
> <forward mode='hostdev' managed='yes'> heading
> 
> (I want to be able to use more virtual machines then there are virtual functions available on an ethernet port).
> 
> As soon as I try to define multiple physical functions in a pool, I get this error:
> 
> 
> error: Failed to define network from biggernetwork.xml
> error: XML error: Only one <pf> element is allowed in <forward> of network bigger network
> 
> 
> when using this command:
> 
> sudo virsh net-define biggernetwork.xml
> 
> 
> on the following XML document:
> 
> <network>
>     <name>bigger network</name>
>     <forward mode='hostdev' managed='yes'>
>      <pf dev='eth5'/>
>      <pf dev='eth7'/>
>     </forward>
> </network>

You need to define only the PF and libvirt will handle the rest:

https://wiki.libvirt.org/page/Networking#Assignment_with_.3Cinterface_type.3D.27hostdev.27.3E_.28SRIOV_devices_only.29

Michal