fix(docs): Static content

Signed-off-by: pmikus <peter.mikus@protonmail.ch>
Change-Id: I29c2c108cec7badbe302095d5797d39c0d34ad58
(cherry picked from commit 14fe52e81c59a5a3558f4f587e56b75e388191dc)

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+To identify performance changes due to VPP code development between previous
+and current VPP release version, both have been tested in CSIT environment of
+latest version and compared against each other. All substantial progressions and
+regressions have been marked up with RCA analysis. See
+:ref:`vpp_throughput_comparisons` and :ref:`vpp_known_issues`.
+
+Physical Testbeds
+-----------------
+
+FD.io CSIT performance tests are executed in physical testbeds hosted by
+:abbr:`LF (Linux Foundation)` for FD.io project. Two physical testbed
+topology types are used:
+
+- **3-Node Topology**: Consisting of two servers acting as SUTs
+  (Systems Under Test) and one server as TG (Traffic Generator), all
+  connected in ring topology.
+- **2-Node Topology**: Consisting of one server acting as SUTs and one
+  server as TG both connected in ring topology.
+
+Tested SUT servers are based on a range of processors. More detailed description
+is provided in :ref:`tested_physical_topologies`. Tested logical topologies are
+described in :ref:`tested_logical_topologies`.
+
+Server Specifications
+---------------------
+
+Complete technical specifications of compute servers used in CSIT
+physical testbeds are maintained in FD.io CSIT repository:
+`FD.io CSIT testbeds - Xeon Cascade Lake`_,
+`FD.io CSIT testbeds - Xeon Ice Lake`_,
+`FD.io CSIT testbeds - EPYC Zen2`_,
+`FD.io CSIT testbeds - Atom Denverton`_,
+`FD.io CSIT testbeds - Atom Snowridge`_.