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+.. _BBSim Reflector:
+
+BBSim Reflector
+===============
+
+BBR (a.k.a BBSim Reflector) is a tool designed to scale test BBSim. It
+is responsible to emulate ONOS and VOLTHA in order to quickly reply to
+any message that BBSim sends.
+
+Here is a graph of the measuraments of BBSim performance captured over
+10 runs with different PON Layout
+
+.. figure:: ./_static/bbr_runs.png
+   :alt: BBSim Performances
+
+   BBSim Performances
+
+Run BBR
+-------
+
+To run ``bbr`` you need to have a ``bbsim`` instance running.
+
+You can start ``bbsim`` locally with:
+
+.. code:: bash
+
+   $ DOCKER_RUN_ARGS="-onu 16 -pon 4" make docker-run
+
+Once ``bbsim`` is up and running you’ll see this on the console:
+
+.. code:: bash
+
+   docker run -p 50070:50070 -p 50060:50060 --privileged --rm --name bbsim """"bbsim:0.0.2-dev /app/bbsim -onu 16 -pon 4
+   time="2019-10-18T00:24:46Z" level=info msg="BroadBand Simulator is on" NumNniPerOlt=1 NumOnuPerPon=16 NumPonPerOlt=4 OltID=0
+   time="2019-10-18T00:24:46Z" level=debug msg=CreateOLT ID=0 NumNni=1 NumOnuPerPon=16 NumPon=4 module=OLT
+   time="2019-10-18T00:24:46Z" level=info msg="Successfully activated DHCP Server" module=NNI
+   time="2019-10-18T00:24:46Z" level=debug msg="Created OLT with id: 0"
+   time="2019-10-18T00:24:46Z" level=debug msg="Started APIService"
+   time="2019-10-18T00:24:46Z" level=debug msg="APIServer Listening on: 0.0.0.0:50070"
+   time="2019-10-18T00:24:46Z" level=debug msg="OLT Listening on: 0.0.0.0:50060" module=OLT
+
+At this point you can start ``bbr`` (note that you need to pass the same
+number of ONUs and PON Ports to the two processes):
+
+.. code:: bash
+
+   $ ./bbr -onu 16 -pon 4
+
+``bbr`` will run to completion and output the time it took to bring all
+the ONUs to the ``dhcp_ack`` state. If the ``bbr`` process doesn’t exit,
+it means something went wrong.
+
+Debugging and issue reporting
+-----------------------------
+
+If you are experiencing issues with ``bbr`` please capture: - ``bbr``
+logs - ``bbsim`` logs - ``bbsimctl onu list`` output
+
+You can use these commands to capture ``bbsim`` and ``bbr`` logs during
+execution:
+
+.. code:: bash
+
+   $ DOCKER_RUN_ARGS="-onu 16 -pon 4" make docker-run 2>&1 | tee bbsim.logs
+
+.. code:: bash
+
+   $ ./bbr -onu 16 -pon 4 2>&1 | tee bbr.logs
+
+And this command to retrieve the list of onus in the system (run this
+command once ``bbr`` is hanging but before terminating ``bbsim``):
+
+.. code:: bash
+
+   docker exec bbsim bbsimctl onu list > onu.list