========
For description of physical testbeds used for VPP performance tests
-please refer to :ref:`physical_testbeds`.
+please refer to :ref:`tested_physical_topologies`.
+
+.. _tested_logical_topologies:
Logical Topologies
------------------
CSIT VPP performance tests are executed on physical testbeds described
-in :ref:`physical_testbeds`. Based on the packet path thru server SUTs,
-three distinct logical topology types are used for VPP DUT data plane
-testing:
+in :ref:`tested_physical_topologies`. Based on the packet path thru
+server SUTs, three distinct logical topology types are used for VPP DUT
+data plane testing:
#. NIC-to-NIC switching topologies.
#. VM service switching topologies.