# Revision history [back]

I use newton release with libvirt xen on openSUSE, and i had the same error. The error comes from interface suffix name that xen use. The problem caused from script /etc/xen/scripts/vif-common.sh as you can see the script try to create an interface with name something like tap320055bf-15-emu (for hvm is tap, for pv is not emulated so not cause error) but xen supports until 16 character devices. So
if you change suffix to be for example -e than -emu the problems solved. So you can change the lines 103 and 111 with changes:

103c103
<     dev_=${dev_%-e} --- > dev_=${dev_%-emu}
111c111
<         vifname="${vifname}-e" --- > vifname="${vifname}-emu"


You must be careful, if you make any package updates of your xen you must re-apply the patch.

I know this is dirty way but works. I will be very happy if i find another way.