-2. Create the test configuration .yaml file.
-3. Build a guest image。
-4. Load the image into the OpenStack environment.
-5. Create a Neutron external network.
-6. Load OpenStack environment variables.
-6. Run the test case.
+2. Load OpenStack environment variables.
+3. Create a Neutron external network.
+4. Build Yardstick flavor and a guest image.
+5. Load the guest image into the OpenStack environment.
+6. Create the test configuration .yaml file.
+7. Run the test case.
+
+
+Prerequisites
+-------------
+
+The OPNFV deployment is out of the scope of this document but it can be
+found in http://artifacts.opnfv.org/opnfvdocs/colorado/docs/configguide/index.html.
+The OPNFV platform is considered as the System Under Test (SUT) in this
+document.
+
+Several prerequisites are needed for Yardstick:
+
+ #. A Jumphost to run Yardstick on
+ #. A Docker daemon shall be installed on the Jumphost
+ #. A public/external network created on the SUT
+ #. Connectivity from the Jumphost to the SUT public/external network
+
+WARNING: Connectivity from Jumphost is essential and it is of paramount
+importance to make sure it is working before even considering to install
+and run Yardstick. Make also sure you understand how your networking is
+designed to work.
+
+NOTE: **Jumphost** refers to any server which meets the previous
+requirements. Normally it is the same server from where the OPNFV
+deployment has been triggered previously.
+
+NOTE: If your Jumphost is operating behind a company http proxy and/or
+Firewall, please consult first the section `Proxy Support`_, towards
+the end of this document. The section details some tips/tricks which
+*may* be of help in a proxified environment.