hi,all,please look at interface .

actually ,virbr0 is NAT,      my program product a vm-xml  which is not standard. it use the way to product bridge interface   to product a NAT interface.

but i want to know if this can work rightly.

<interface type='bridge'> # "type='network'"

      <mac address='00:1a:4a:a8:7a:09'/>

      <source bridge='virbr0'/># network='virbr0'

      <target dev='vnet0'/>

      <model type='virtio'/>

      <boot order='3'/>

      <alias name='net0'/>

      <address type='pci' domain='0x0000' bus='0x00'! slot='0x03' function='0x0'/>

    </interface>

thanks