libvirt users - Sep 2012 - network comanline to xml

hello,

i start a kvm guest with the following comand line:

kvm -hda myimage.img -m 1024 -smp 2 \
     -net nic -net tap,ifname=tap0,script=no

now a plan to start this via libvirt.
I have try to set nat via the libvirt-manager but this doesn't connect.
So i try to use bridge network via the GUI and get a "non supported" 
error when i use tap0 as "bridge device".

How can i "convert" the "-net nic -net
tap,ifname=tap0,script=no" to a
valid libvirt-xml file?
The following example is also buggy:

  <interface type='network'>
       <mac address='52:54:00:46:3e:70'/>
       <source network='default'/>
       <target dev='tap0'/>
       <model type='virtio'/>
       <address type='pci' domain='0x0000' bus='0x00'
slot='0x03'
function='0x0'$
  </interface>


thanks

hello,

i start a kvm guest with the following comand line:

kvm -hda myimage.img -m 1024 -smp 2 \
      -net nic -net tap,ifname=tap0,script=no

now a plan to start this via libvirt.
I have try to set nat via the libvirt-manager but this doesn't connect 
to network.
So i try to use bridge network via the GUI and get a "non supported" 
error when i use tap0 as "bridge device".

How can i "convert" the "-net nic -net
tap,ifname=tap0,script=no" to a
valid libvirt-xml file?

The following example is also buggy:

<interface type='network'>
<mac address='52:54:00:46:3e:70'/>
<source network='default'/>
<target dev='tap0'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x03' function='0x0'$
</interface>


thanks