+vfNIC-to-vhost-user Switching
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+vfNIC-to-vhost-user switching topology test cases require VPP DUT to communicate
+with Virtual Machine (VM) over Vhost-user virtual interfaces. VM is created on
+SUT1 for the duration of these particular test cases only. Virtual test topology
+with VM is shown in the figure below.
+
+.. only:: latex
+
+ .. raw:: latex
+
+ \begin{figure}[H]
+ \centering
+ \graphicspath{{../_tmp/src/vpp_device_tests/}}
+ \includegraphics[width=0.90\textwidth]{vf-2n-nic2vhost}
+ \label{fig:vf-2n-nic2vhost}
+ \end{figure}
+
+.. only:: html
+
+ .. figure:: ../vpp_device_tests/vf-2n-nic2vhost.svg
+ :alt: vf-2n-nic2vhost
+ :align: center
+
+vfNIC-to-memif Switching
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+vfNIC-to-memif switching topology test cases require VPP DUT to communicate
+with another Docker Container over memif interfaces. Container is created for
+the duration of these particular test cases only and it is running the same VPP
+version as running on DUT. Virtual test topology with Memif is shown in
+the figure below.
+
+.. only:: latex
+
+ .. raw:: latex
+
+ \begin{figure}[H]
+ \centering
+ \graphicspath{{../_tmp/src/vpp_device_tests/}}
+ \includegraphics[width=0.90\textwidth]{vf-2n-nic2memif}
+ \label{fig:vf-2n-nic2memif}
+ \end{figure}
+
+.. only:: html
+
+ .. figure:: ../vpp_device_tests/vf-2n-nic2memif.svg
+ :alt: vf-2n-nic2memif
+ :align: center
+