Basic Delete ANC Policy Notification

This sample registers and outputs messages received for Cisco Adaptive Network Control (ANC) delete policy notifications via DXL and Cisco pxGrid.

The majority of the sample code is shown below.

Sample Code

# Create the client
with DxlClient(config) as dxl_client:

    # Connect to the fabric
    dxl_client.connect()

    logger.info("Connected to DXL fabric.")

    # Create client wrapper
    client = CiscoPxGridClient(dxl_client)

    class MyAncDeletePolicyCallback(AncDeletePolicyCallback):
        def on_delete_policy(self, delete_dict):
            print("on_delete_policy\n" +
                  MessageUtils.dict_to_json(delete_dict, pretty_print=True))

    # Attach callback for 'delete policy' events
    client.anc.add_delete_policy_callback(MyAncDeletePolicyCallback())

    # Wait forever
    print("Waiting for delete policy events...")
    while True:
        time.sleep(60)

Once a connection is established to the DXL fabric, a CiscoPxGridClient instance is created which will be used to communicate with Cisco pxGrid.

Next, the add_delete_policy_callback() method is invoked to register a callback for delete policy event notifications.

When a delete policy event occurs, the on_delete_policy() method in the MyAncDeletePolicyCallback class is invoked. The deletc_dict parameter passed into the callback, a dictionary (dict) which contains the content of the event notification, is displayed.

Output

After the example starts up, the initial output should appear similar to the following:

Waiting for delete policy events...

To generate a delete policy notification, delete an ANC policy on the server. The policy could be deleted by logging into the ISE web interface and performing the following steps:

• Navigate to Operations → Adaptive Network Control → Policy List.
• On the List screen, check the box next to the policy name -- for example: test_policy -- and press the Trash drop down.
• Press the Selected item in the Trash drop down to delete the policy.

A message similar to the following should appear in the output of the notification example:

{
    "action": [
        "Quarantine"
    ],
    "name": "test_policy"
}