[libvirt-users] this function is not supported by the connection driver: virInterfaceDefineXML

[netsurfed]

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 at 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 at 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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