diff --git a/index.rst b/index.rst
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--- a/index.rst
+++ b/index.rst
@@ -43,6 +43,7 @@
 
    testing/about_system_tests
    testing/acceptance_specification
+   testing/pdp_testing
 
 .. toctree::
    :maxdepth: 1
diff --git a/testing/pdp_testing.rst b/testing/pdp_testing.rst
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@@ -0,0 +1,114 @@
+..
+   SPDX-FileCopyrightText: © 2021 Open Networking Foundation <support@opennetworking.org>
+   SPDX-License-Identifier: Apache-2.0
+
+PDP Testing
+==============
+
+
+Test Framework
+--------------
+
+We use `TestVectors`_ to connect to Stratum hardware switches using gRPC and execute gNMI and P4Runtime tests.
+For Aether, we convert existing ptf unit tests written for fabric-tna to TestVectors and execute them on Stratum
+hardware switches in loopback mode using `TestVectors-Runner`_.
+
+We use Jenkins to schedule and trigger our tests which run against a set of hardware switches.
+
+Test Scenarios
+-------------------
+
+fabric-tna is a P4 program based on the Tofino Native Architracture(TNA). Currently 4 profiles are supported for
+compiling the fabric-tna P4 program.
+
+1. fabric
+2. fabric-spgw
+3. fabric-int
+4. fabric-spgw-int
+
+Based on the ptf unit tests for fabric-tna, we generate TestVectors for each profile to run on Stratum hardware
+switches. The names of generated tests can be found in `Test List`_.
+
+Prerequisites to Generate, Run Tests
+--------------------------------------
+1. Stratum running on a hardware switch with 4 ports running in loopback mode.
+2. Create a port-map similar to `port-map`_. The three fields are ptf_port, p4_port and iface_name.
+   ptf_port is the port id used in the test, p4_port is a valid port id from Stratum hardware.
+   iface_name is ignored in TestVector generation, this can be any value.
+
+How to Generate TestVectors
+--------------------------------------
+1. Checkout fabric-tna repo.
+
+.. code-block:: shell
+
+   $git clone https://github.com/stratum/fabric-tna.git
+   $cd fabric-tna
+
+2. Compile the P4 program for specific profile.
+
+.. code-block:: shell
+
+   $make <profile>
+
+Supported profiles are: fabric, fabric-spgw, fabric-int, fabric-spgw-int.
+
+3. Generate TestVectors.
+
+.. code-block:: shell
+
+   $cd ptf
+   $run/tv/run <profile> PORTMAP=port_map.json GRPCADDR=<switch_ip>:<switch_port> CPUPORT=<cpu_port>
+
+switch_ip and switch_port are IP and port where Stratum is running.
+cpu_port is 192 for dual pipe switch and 320 for quad pipe switch.
+Generated TestVectors are stored under 'fabric-tna/ptf/TestVectors'.
+
+How to Run TestVectors
+--------------------------------------
+1. Checkout `TestVectors-Runner`_ repo.
+
+.. code-block:: shell
+
+   $git clone https://github.com/stratum/testvectors-runner -b support-fabric-tna
+   $cd testvectors-runner
+
+2. Build tv-runner docker image.
+
+.. code-block:: shell
+
+   $docker build -t tvrunner:fabric-tna-binary -f build/test/Dockerfile .
+
+3. Push PipelineConfig.
+
+.. code-block:: shell
+
+   $IMAGE_NAME=tvrunner:fabric-tna-binary ./tvrunner.sh --target ${tv_dir}/target.pb.txt --portmap ${tv_dir}/portmap.pb.txt --tv-dir ${tv_dir} --dp-mode loopback --tv-name PipelineConfig
+
+4. Run Setup.
+
+.. code-block:: shell
+
+   $IMAGE_NAME=tvrunner:fabric-tna-binary ./tvrunner.sh --dp-mode loopback --match-type in --target ${tv_dir}/target.pb.txt --portmap ${tv_dir}/portmap.pb.txt --tv-dir ${tv_dir}/${test_name}/setup
+
+5. Run TestVector.
+
+.. code-block:: shell
+
+   $IMAGE_NAME=tvrunner:fabric-tna-binary ./tvrunner.sh --dp-mode loopback --match-type in --target ${tv_dir}/target.pb.txt --portmap ${tv_dir}/portmap.pb.txt --tv-dir ${tv_dir}/${test_name} --tv-name ${test_name}.* --result-dir ./results --result-file ${test_name}
+
+6. Run Teardown.
+
+.. code-block:: shell
+
+   $IMAGE_NAME=tvrunner:fabric-tna-binary ./tvrunner.sh --dp-mode loopback --match-type in --target ${tv_dir}/target.pb.txt --portmap ${tv_dir}/portmap.pb.txt --tv-dir ${tv_dir}/${test_name}/teardown
+
+tv_dir is the directory where TestVectors are stored. In this case, tv_dir is 'fabric-tna/ptf/TestVectors'.
+tv_name is the name of the test case. It's also the directory name of the test under 'fabric-tna/ptf/TestVectors'.
+
+Results for each test are generated under 'testvectors-runner/results' directory in csv format.
+
+.. _TestVectors: https://github.com/stratum/testvectors
+.. _TestVectors-Runner: https://github.com/stratum/testvectors-runner/tree/support-fabric-tna
+.. _Test List: https://github.com/stratum/stratum-ci/blob/master/ptf_tv_resources/converted-tests.yaml
+.. _port-map: https://github.com/stratum/stratum-ci/blob/master/ptf_configs/x86-64-stordis-bf2556x-1t-r0/port_map.json