libvirt users - Nov 2017 - this function is not supported by the connection driver: virInterfaceDefineXML

Hi all:
I'm facing problems trying to define a bridge on Ubuntu 16.04, using libvirt
3.4.0.
When I try to do:
root@ubuntu-180:/tmp# virsh iface-define iface-testbr1.xml

I get the following error:
error: Failed to define interface from iface-testbr1.xml
error: this function is not supported by the connection driver:
virInterfaceDefineXML

What can i do to make this function works normally? THX.
The xml file as:
<interface type='bridge' name='testbr1'>
  <mtu size='1500'/>
  <bridge stp='on' delay='1500'>
      <interface type='ethernet' name='enp9s0'>
            <link speed='1000' state='up'/>
            <mac address='0c:c4:7a:c1:63:17'/>
      </interface>
   </bridge>
</interface>
root@ubuntu-180:/tmp# uname -a
Linux ubuntu-180 4.4.0-62-generic #83-Ubuntu SMP Wed Jan 18 14:10:15 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux

On 11/06/2017 09:13 PM, netsurfed wrote:
> Hi all:
> 
> I'm facing problems trying to define a bridge on Ubuntu 16.04, using
libvirt 3.4.0.
> 
> When I try to do:
> root@ubuntu-180:/tmp# virsh iface-define iface-testbr1.xml
> 
> I get the following error:
> error: Failed to define interface from iface-testbr1.xml
> error: this function is not supported by the connection driver:
virInterfaceDefineXML
> 
It's supported by the netcf interface backend.

What does "virsh -V" tell you?

In the "Networking:" line you'd see 'Interface netcf' - I
have to assume
you have 'udev' instead.
> What can i do to make this function works normally? THX.
If netcf isn't supported on Ubuntu, then that's a packaging thing.

John
> 
> The xml file as:
> 
> <interface type='bridge' name='testbr1'>
> 
>   <mtu size='1500'/>
>   <bridge stp='on' delay='1500'>
>       <interface type='ethernet' name='enp9s0'>
>             <link speed='1000' state='up'/>
>             <mac address='0c:c4:7a:c1:63:17'/>
>       </interface>
>    </bridge>
> </interface>
> 
> root@ubuntu-180:/tmp# uname -a
> Linux ubuntu-180 4.4.0-62-generic #83-Ubuntu SMP Wed Jan 18 14:10:15 UTC
2017 x86_64 x86_64 x86_64 GNU/Linux
> 
> 
> 
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