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+5G PNF Software Upgrade
+----------------------------
+
+Description
+~~~~~~~~~~~
+The 5G PNF Software upgrade use case shows how users/network operators can modify the software running on an existing PNF. This use case is one aspect of Software Management. This could be used to update the PNF software to a newer or older version of software.
+
+The Casablanca 5G PNF Software Upgrade Use Case Wiki Page can be found here: https://wiki.onap.org/display/DW/5G+-+PNF+Software+Update
+
+How to Use
+~~~~~~~~~~
+Upgrading PNF (instance) software requires the user/network operator to trigger the upgrade operation from the UI, e.g. VID or UUI. In Cacablanca, users need use ONAP Controllers GUI to trigger the LCM opeations, like pre-check, post-check and upgrade. After receiving the API requests, the ONAP controllers will communicate to the external controller(EC) through south-bound adaptors, which is Ansible in R3.
+
+Note that, both APPC and SDNC in R3 supported Ansible. Taking SDNC and Prechecking as an example, the steps are as follows:
+
+1) In ansible server container, prepare the ssh connection conditions to the external controller, both ssh key file and ansible inventory configuration;
+
+2) In sdnc controller container, update the dg configuration file: lcm-dg.properties.
+For example:
+::
+lcm.pnf.upgrade-pre-check.playbookname=ansible_huawei_precheck
+lcm.pnf.upgrade-post-check.playbookname=ansible_huawei_postcheck
+lcm.pnf.upgrade-software.playbookname=ansible_huawei_upgrade
+
+3) Login controller UI, access the pre-check LCM operation and send request.
+Post upgrade-pre-check with the following request body:
+::
+{
+ "input": {
+ "common-header": {
+ "timestamp": "2018-10-10T09:40:04.244Z",
+ "api-ver": "2.00",
+ "originator-id": "664be3d2-6c12-4f4b-a3e7-c349acced203",
+ "request-id":"664be3d2-6c12-4f4b-a3e7-c349acced203",
+ "sub-request-id": "1",
+ "flags": {
+ "force" : "TRUE",
+ "ttl" : 60000
+ }
+ },
+ "action": "UpgradePreCheck",
+ "action-identifiers": {
+ "vnf-id":"5gDU0001"
+ },
+ "payload": "{\"pnf-flag\":\"true\", \"pnf-name\": \"5gDU0001\",\"pnfId\": \"5gDU0001\", \"ipaddress-v4-oam\": \"EC_IP_address\",\"oldSwVersion\": \"v1\", \"targetSwVersion\": \"v2\", \"ruleName\": \"r001\", \"Id\": \"10\", \"additionalData\":\"{}\"}"}}
+
+4) The HTTP API response code 200 and LCM retured code 400 (See APPC return code design specification) indicate success, otherwise failed.
+
+Test Status and Plans
+~~~~~~~~~~~~~~~~~~~~~
+To see information on the status of the test see: https://wiki.onap.org/display/DW/5G+-+PNF+Software+Update+Test+Status
+
+Known Issues and Resolutions
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+None
+