    <interface type='bridge'>
      <!-- bridge mapped from "VM Network" to "bridge1" -->
      <source bridge='bridge1'/>
    </interface>
    <interface type='bridge'>
      <!-- bridge mapped from "bob" to "bridge2" -->
      <source bridge='bridge2'/>
      <mac address='52:54:00:01:02:03'/>
    </interface>
    <interface type='network'>
      <!-- network mapped from "default" to "network1" -->
      <source network='network1'/>
      <mac address='52:54:00:01:02:04'/>
    </interface>
    <interface type='network'>
      <!-- network mapped from "john" to "network2" -->
      <source network='network2'/>
      <mac address='52:54:00:01:02:05'/>
    </interface>
    <interface type='network'>
      <!-- network mapped from "paul" to "network3" -->
      <source network='network3'/>
      <mac address='52:54:00:01:02:06'/>
    </interface>
    <interface type='network'>
      <!-- network mapped from "george" to "network4" -->
      <source network='network4'/>
      <mac address='52:54:00:01:02:07'/>
    </interface>
    <interface type='network'>
      <!-- network mapped from "ringo" to "network4" -->
      <source network='network4'/>
      <mac address='52:54:00:01:02:08'/>
    </interface>
