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+
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+**********************************************************
+Tutorial: Testing the VOLTE Use Case in a standalone PDP-D
+**********************************************************
+
+.. contents::
+ :depth: 3
+
+In this tutorial we will go over how to access and start up the PDP-D, setup the prerequisites for the VOLTE flow, enable/disable the VFC Simulator that will be used in the VOLTE flow, and inject messages to trigger the VOLTE flow.
+
+Accessing and starting the PDP-D
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The first step is to access the docker container of name *drools*.
+
+ .. code-block:: bash
+
+ docker exec -it -u 0 drools su - policy
+
+The PDP-D software is installed under the *policy* account, the policy root directory is under *${POLICY_HOME}* environment variable and it may be changed on a per installation basis. It is typically set up under the */opt/app/policy* directory but can be changed during installation. All PDP-D software runs with non-root privileges as *policy* is a regular user account.
+
+Once within the drools container, the running status can be observed by using the *policy* command:
+
+ .. code-block:: bash
+
+ policy [--debug] status|start|stop
+
+The running status of the PDP-D can be observed with *policy status*
+
+ .. code-block:: bash
+
+ policy@drools:~$ policy status [drools-pdp-controllers] L []: Policy Management (pid 1500) is running 1 cron jobs installed.
+
+
+Prerequisites for the VOLTE flow
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+In order to trigger the VOLTE flow we will need to inject an ONSET message via curl command. We're going to create a temporary *util* directory to store a file that contains the VOLTE ONSET message.
+
+Navigate to */tmp* and create directory *util*. *util* is just a temporary folder we've created to use as our 'workspace'.
+
+ .. code-block:: bash
+
+ cd /tmp
+ mkdir util
+
+
+Next, we're going to create a file named *dcae.volte.onset.json* and edit it to paste the VOLTE ONSET message contents.
+
+ .. code-block:: bash
+
+ touch dcae.volte.onset.json
+ vi dcae.volte.onset.json
+
+Here are the contents of the VOLTE ONSET message. Copy/paste this into dcae.volte.onset.json:
+
+ .. code-block:: json
+
+ {
+ "closedLoopEventClient": "DCAE.HolmesInstance",
+ "policyVersion": "1.0.0.5",
+ "policyName": "vVOLTE",
+ "policyScope": "resource=volte,service=VolteSErvice,type=SampleType,closedLoopControlName=CL-VOLTE-SIG-d925ed73-8231-4d02-9545-db4e101f88f8",
+ "target_type": "VM",
+ "AAI": {
+ "vserver.vserver-name": "dfw1lb01lb01",
+ "service-instance.service-instance-id" : "TBD",
+ "generic-vnf.vnf-id" : "TBD",
+ "generic-vnf.vnf-name" : "TBD"
+ },
+ "closedLoopAlarmStart": 1484677482204798,
+ "closedLoopEventStatus": "ONSET",
+ "closedLoopControlName": "ControlLoop-VOLTE-2179b738-fd36-4843-a71a-a8c24c70c55b",
+ "version": "1.0.2",
+ "target": "vserver.vserver-name",
+ "requestID": "97964e10-686e-4790-8c45-bdfa61df770f",
+ "from": "DCAE"
+ }
+
+
+Enabling the VFC Simulator
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Enabling the *controlloop-utils* feature will enable the simulators. To do this, simply stop the drools pdp, enable the feature, and restart the drools pdp like so:
+
+ .. code-block:: bash
+
+ policy stop
+ features enable controlloop-utils
+ policy start
+
+Now, in */opt/app/policy/config/* directory, you should see a new properties file named *simulators.properties.environment*. In here you will find the credentials for the VFC simulator.
+
+Injecting an ONSET to trigger the VOLTE Flow
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+We are now ready to inject an ONSET message to trigger the VOLTE flow. Simply navigate back to the directory *dcae.volte.onset.json* file is saved (i.e. cd /tmp/util) and run this curl command:
+
+ .. code-block:: bash
+
+ http -a @1b3rt:31nst31n PUT :9696/policy/pdp/engine/topics/sources/ueb/unauthenticated.DCAE_CL_OUTPUT/events @dcae.volte.onset.json Content-Type:"text/plain"
+
+You should see some output similar to this:
+
+.. image:: tutorial_VOLTE_1.png
+
+You can view the logs to see the network activity or find any errors that may have occurred. Logs are located in */opt/app/policy/logs*.
+
+Reading the logs
+^^^^^^^^^^^^^^^^
+
+Once you've injected the onset message, this should appear in the network.log:
+
+.. image:: tutorial_VOLTE_2.png
+
+
+End of Document
+
+.. SSNote: Wiki page ref. https://wiki.onap.org/display/DW/Tutorial%3A+Testing+the+VOLTE+Use+Case+in+a+standalone+PDP-D