Xen hotplug can’t add vif to eth0: operation not supported

xen

I am new to xen and I am trying to get a domU running but I am having problems with it. I think my network card might not support bridging which is bizarre.

This is the error I get when trying to create the domU

[root@hyrba ~]# xm create sardis.secusrvr.com.cfg
Using config file "/etc/xen/sardis.secusrvr.com.cfg".
Error: Device 0 (vif) could not be connected. Hotplug scripts not working.

All the xen kernel modules are loaded…

xen_pciback            52948  0 
xen_gntalloc            6807  0 
xen_acpi_processor      5390  1 
xen_netback            27155  0 [permanent]
xen_blkback            21827  0 [permanent]
xen_gntdev             10849  1 
xen_evtchn              5215  1 
xenfs                   3326  1 
xen_privcmd             4854  16 xenfs

I get this error in /var/log/xen/xen-hotplug.log

RTNETLINK answers: Operation not supported
can't add vif2.0 to bridge eth0: Operation not supported
can't add vif2.0-emu to bridge eth0: Operation not supported

Best Answer

I know it's been some time since this question was asked, but for benefit of others will post the solution that helped me.

Had similar error on Oracle OVM 2, was not able to start VM:

# tail /var/log/xen/xen-hotplug.log 
...
can't add vif128.0 to bridge eth0: Operation not supported
...

Problem: biding to incorrect interface.

Solution: editing vm.cfg and changing the vif= parameter node "bridge" from eth0 to xenbr0 the VM started:

Before

# cat vm.cfg | grep '^vif'
vif = ['bridge=eth0,mac=00:16:3E:01:59:04,type=ioemu']

After

# cat vm.cfg | grep '^vif'
vif = ['bridge=xenbr0,mac=00:16:3E:01:59:04,type=ioemu']
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