diff --git a/doc/user-guides/acrn-dm-parameters.rst b/doc/user-guides/acrn-dm-parameters.rst
index 8bf9896c1..c7d549914 100755
--- a/doc/user-guides/acrn-dm-parameters.rst
+++ b/doc/user-guides/acrn-dm-parameters.rst
@@ -454,23 +454,25 @@ arguments used for configuration.  Here is a table describing these emulated dev
 
    * - ``virtio-net``
      - Virtio network type device, parameter should be appended with the format:
-       ``virtio-net,<device_type>=<name>,[vhost],[mac=<XX:XX:XX:XX:XX:XX>],[mac_seed=<seed_string>]``.
-       The ``mac`` address is optional, ``name`` is the name of the TAP (or MacVTap) device.
-       ``vhost`` specifies vhost backend, otherwise the VBSU backend is used.
-       ``mac_seed=<seed_string>``
-       Set a platform-unique string as a seed to generate the mac address.  Each
-       VM should have a different "seed_string".  The "seed_string" can be
-       generated by the following method where $(vm_name) contains the name of the
-       VM you are going to launch.
+       ``virtio-net,<device_type>=<name>[,vhost][,mac=<XX:XX:XX:XX:XX:XX> | mac_seed=<seed_string>]``.
+       The only supported ``device_type`` parameter is
+       ``tap``. The ``mac`` address is optional and ``name`` is the name of the TAP
+       (or MacVTap) device. ``vhost`` specifies vhost backend, otherwise the
+       VBSU backend is used. ``mac_seed=<seed_string>`` sets a platform-unique
+       string as a seed to generate the MAC address.  Each VM should have a
+       different ``seed_string``.  The ``seed_string`` can be
+       generated by the following method where ``$(vm_name)`` contains the name
+       of the VM you are going to launch.
+
+       .. code-block::
+
+          mac=$(cat /sys/class/net/e*/address)
+          seed_string=${mac:9:8}-${vm_name}
 
        .. note::
-          When both ``mac`` and ``mac_seed`` are set, the latter is ignored
-          and the MAC address is set to the ``mac`` value. ``mac_seed`` will
-          only be used when ``mac`` is not set.
-.. code-block::
-
-       mac=$(cat /sys/class/net/e*/address)
-       seed_string=${mac:9:8}-${vm_name}
+          ``mac`` and ``mac_seed`` are mutually exclusive, when both are set the
+          latter is ignored and the MAC address is set to the ``mac`` value.
+          ``mac_seed`` will only be used when ``mac`` is not set.
 
    * - ``passthru``
      - Indicates a passthrough device. Use the parameter with the format