Libvirt Domain XML for Mininet Guest ** N.B., I converted the vmdk to a qcow2 using virt-convert ** N.B., Make sure to specify the actual path to your qcow2 disk image

libvirt-mininet.xml

<domain type='kvm'>
  <name>mininet</name>
  <memory unit='KiB'>1048576</memory>
  <currentMemory unit='KiB'>1048576</currentMemory>
  <vcpu placement='static'>1</vcpu>
  <os>
    <type arch='x86_64' machine='pc'>hvm</type>
  </os>
  <features>
    <acpi/>
    <pae/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/path/to/mininet.qcow2'/>
      <target dev='hda' bus='virtio'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file=''/>
      <target dev='hdc' bus='ide'/>
      <readonly/>
    </disk>
    <controller type='usb' index='0'/>
    <controller type='ide' index='0'/>
    <controller type='pci' index='0' model='pci-root'/>
    <interface type='ethernet'>
      <mac address='c8:f7:33:00:13:37'/>
      <target dev='mininet'/>
      <model type='virtio'/>
    </interface>
    <serial type='pty'/>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='5901' autoport='no' listen=''>
      <listen type='address' address=''/>
    </graphics>
    <video>
      <model type='vga' vram='9216' heads='1'/>
    </video>
    <memballoon model='virtio'/>
  </devices>
</domain>