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+Test Scenarios Overview
+=======================
+
+FD.io CSIT report includes multiple test scenarios of a number of VPP
+centric applications, topologies and use cases. In addition it also
+covers baseline tests of DPDK sample applications. Tests are executed
+executed in physical (performance tests) and virtual environments
+(functional tests).
+
+Following list provides a brief overview of test scenarios covered in
+this report:
+
+#. **VPP Performance**: VPP performance tests are executed in physical
+   FD.io testbeds, focusing on VPP network data plane performance in
+   NIC-to-NIC switching topologies. Tested across Intel Xeon Haswell
+   and Skylake servers, range of NICs (10GE, 25GE, 40GE) and multi-
+   thread/multi-core configurations. VPP application runs in bare-metal
+   host user-mode handling NICs. TRex is used as a traffic generator.
+
+#. **VPP Vhostuser Performance with KVM VMs**: VPP VM service switching
+   performance tests using vhostuser virtual interface for
+   interconnecting multiple Testpmd-in-VM instances. VPP vswitch
+   instance runs in bare-metal user-mode handling NICs and connecting
+   over vhost-user interfaces to VM instances each running DPDK
+   Testpmd with virtio virtual interfaces. Similarly to VPP
+   Performance, tests are run across a range of configurations. TRex
+   is used as a traffic generator.
+
+#. **VPP Memif Performance with LXC and Docker Containers**: VPP
+   Container service switching performance tests using memif virtual
+   interface for interconnecting multiple VPP-in-container instances.
+   VPP vswitch instance runs in bare-metal user-mode handling NICs and
+   connecting over memif (Slave side) interfaces to more instances of
+   VPP running in LXC or in Docker Containers, both with memif
+   interfaces (Master side). Similarly to VPP Performance, tests are
+   run across a range of configurations. TRex is used as a traffic
+   generator.
+
+#. **K8s Container/Pod Topologies Performance**: VPP container
+   performance tests using memif for interconnecting VPP-in-
+   Container/Pod instances orchestrated by K8s integrated with `Ligato
+   <https://github.com/ligato>`_ for container networking. TRex is
+   used as a traffic generator.
+
+#. **DPDK Performance**: VPP uses DPDK to drive the NICs and physical
+   interfaces. DPDK performance tests are used as a baseline to
+   profile performance of the DPDK sub-system. Two DPDK applications
+   are tested: Testpmd and L3fwd. DPDK tests are executed in the same
+   testing environment as VPP tests. DPDK Testpmd and L3fwd
+   applications run in host user-mode. TRex is used as a traffic
+   generator.
+
+#. **VPP Functional**: VPP functional tests are executed in virtual
+   FD.io testbeds, focusing on VPP packet processing functionality,
+   including both network data plane and in-line control plane. Tests
+   cover vNIC-to-vNIC vNIC-to-nestedVM-to-vNIC forwarding topologies.
+   Scapy is used as a traffic generator.
+
+#. **Honeycomb Functional**: Honeycomb functional tests are executed in
+   virtual FD.io testbeds, focusing on Honeycomb management and
+   programming functionality of VPP. Tests cover a range of CRUD
+   operations executed against VPP.
+
+#. **NSH_SFC Functional**: NSH_SFC functional tests are executed in
+   virtual FD.io testbeds focusing on VPP nsh-plugin data plane
+   functionality. Scapy is used as a traffic generator.
+
+#. **DMM Functional**: DMM functional tests are executed in virtual
+   FD.io testbeds demonstrating a single server (DUT1) and single
+   client (DUT2) scenario using DMM framework and Linux kernel TCP/IP
+   stack.
+
+All CSIT test results listed in this report are sourced and auto-
+generated from :abbr:`RF (Robot Framework)` :file:`output.xml` files
+resulting from :abbr:`LF (Linux Foundation)` FD.io Jenkins jobs executed
+against |vpp-release| release artifacts. References are provided to the
+original FD.io Jenkins job results. Additional references are provided
+to the :abbr:`RF (Robot Framework)` result files that got archived in
+FD.io Nexus online storage system.
+
+FD.io CSIT system is developed using two main coding platforms: :abbr:`RF (Robot
+Framework)` and Python2.7. |csit-release| source code for the executed test
+suites is available in CSIT branch |release| in the directory
+:file:`./tests/<name_of_the_test_suite>`. A local copy of CSIT source code
+can be obtained by cloning CSIT git repository - :command:`git clone
+https://gerrit.fd.io/r/csit`.