-Tested Virtual Topologies
--------------------------
-
-CSIT NSH_SFC functional tests are executed on virtualized topologies created using
-:abbr:`VIRL (Virtual Internet Routing Lab)` simulation platform contributed by
-Cisco. VIRL runs on physical baremetal servers hosted by LF FD.io project.
-Majority of the tests are executed in the three node logical test topology -
-Traffic Generator (TG) node and two Systems Under Test (SUT) nodes connected in
-a loop. Some tests use two node logical test topology - TG node and SUT1 node.
-Both logical test topologies are shown in the figures below.::
-
- +------------------------+ +------------------------+
- | | | |
- | +------------------+ | | +------------------+ |
- | | <-----------------> | |
- | | | | | | | |
- | | DUT1 <-----------------> DUT2 | |
- | +--^--^------------+ | | +------------^--^--+ |
- | | | | | | | |
- | | | SUT1 | | SUT2 | | |
- +------------------------+ +------------------------+
- | | | |
- | | | |
- | | +-----------+ | |
- | +---------------> <---------------+ |
- | | TG | |
- +------------------> <------------------+
- +-----------+
-
- +------------------------+
- | |
- | +------------------+ |
- +---------------> <--------------+
- | | | | | |
- | |------------> DUT1 <-----------+ |
- | | | +------------------+ | | |
- | | | | | |
- | | | SUT1 | | |
- | | +------------------------+ | |
- | | | |
- | | | |
- | | +-----------+ | |
- | +---------------> <---------------+ |
- | | TG | |
- +------------------> <------------------+
- +-----------+
+Virtual Topologies
+------------------
+
+CSIT NSH_SFC functional tests are executed on virtualized topologies created
+using :abbr:`VIRL (Virtual Internet Routing Lab)` simulation platform
+contributed by Cisco. VIRL runs on physical baremetal servers hosted by LF FD.io
+project. Based on the packet path thru server SUTs, one logical
+topology type is used for VPP DUT data plane testing:
+
+#. NIC-to-NIC switching topologies.
+
+NIC-to-NIC Switching
+~~~~~~~~~~~~~~~~~~~~
+
+The simplest logical topology for software data plane application like
+VPP is NIC-to-NIC switching. Tested topology for the 3-Node
+testbeds is shown in the figure below.
+
+.. only:: latex
+
+ .. raw:: latex
+
+ \begin{figure}[H]
+ \centering
+ \graphicspath{{../_tmp/src/vpp_performance_tests/}}
+ \includegraphics[width=0.90\textwidth]{logical-3n-nic2nic}
+ \label{fig:logical-3n-nic2nic}
+ \end{figure}
+
+.. only:: html
+
+ .. figure:: ../vpp_performance_tests/logical-3n-nic2nic.svg
+ :alt: logical-3n-nic2nic
+ :align: center