<interface type='network' name='blah'>

      <source network='dpbr_n_0'/>

    </interface>

This doesn't seem to work; it always ends up creating interface with name as "eth0".

I found some examples here: http://libvirt.org/guide/html/Application_Development_Guide-Network_Interfaces-XML_Format.html

That uses interface type as "ethernet" and specifies name also, If I do that, I get back an error while starting the container as "Unsupported network type ethernet".

Appreciate your help.