Thanks, let me see it On Wed, Mar 12, 2014 at 8:01 PM, Michal Privoznik <mprivozn@redhat.com>wrote:

On 12.03.2014 14:41, Sijo Jose wrote:

...

Hi, Could anyone help I'm getting the following error when I tried to add a new network interface.

DETAILS

Connection --------------------------- import libvirt conn = libvirt.open('qemu:///system')

Interface XML ----------------------

<interface type="bridge" name="br0"> <start mode="onboot"/> <mtu size="1500"/> <protocol family="ipv4"> <dhcp/> </protocol> <bridge stp="off" delay="0.01"> <interface type="ethernet" name="eth0"> <mac address="ab:bb:cc:dd:ee:ff"/> </interface> <interface type="ethernet" name="eth1"/> </bridge> </interface>

In [96]:

conn.interfaceDefineXML(interfacexml,0)

------------------------------------------------------------ --------------- libvirtError Traceback (most recent call last) /home/saju/<ipython-input-96-0536ffe3fa23> in<module>() ----> 1 conn.interfaceDefineXML(br1xml,0)

/usr/lib/python2.7/dist-packages/libvirt.pyc ininterfaceDefineXML(self, xml, flags) 2750 libvirtd. """ 2751 ret= libvirtmod.virInterfaceDefineXML(self._o, xml, flags) -> 2752 if retis None:raise libvirtError('virInterfaceDefineXML() failed', conn=self) 2753 __tmp= virInterface(self, _obj=ret)

2754 return __tmp

libvirtError: this function is not supported by the connection driver: virInterfaceDefineXML

That's because you've libvirt compiled with udev rather than netcf. The netcf is the only one backend that knows how to create a new interface.

Install netcf and rebuild libvirt and you should be able to create interfaces via libvirt.

Michal