# Create an AWS Cloud WAN core network policy version using JSON
<a name="cloudwan-create-policy-json"></a>

You can create a core network policy by creating a JSON file. In the JSON editor, you add the parameters of your core network and policies, including advanced routing policies for fine-grained traffic control. For a description of the required and optional parameters in the JSON file, see [Core network policy version parameters in AWS Cloud WAN](cloudwan-policies-json.md).

**Note**  
Familiarity with creating JSON files is required.

**To create a policy version using a JSON editor**

1. Access the Network Manager console at [https://console.aws.amazon.com/networkmanager/home/](https://console.aws.amazon.com/networkmanager/home).

1. Under **Connectivity** choose **Cloud WAN**.

1. On the **Global networks** page, choose the global network ID that for the core network you want to create a policy version for, and then choose **Core network**.

1. In the navigation pane, choose **Policy versions**.

1. Choose **Create policy version**.

1. In **Choose policy view mode**, choose **JSON**. 

1. In the JSON editor, create your new policy. You can create a new policy version using a blank form, or copy and modify the contents of a policy version that you've downloaded.
   + For the required and optional parameters in your JSON policy, see [Core network policy version parameters in AWS Cloud WAN](cloudwan-policies-json.md).
   + For the steps to download a previous policy version, see 

1. Choose **Create policy**.

   A new policy version is generated. 

   The **Change set state** on the **Policy version** page displays **Pending generation** while the new policy generates. The state changes when the policy either generates successfully or fails to generate. 

**Topics**
+ [Core network policy version parameters](cloudwan-policies-json.md)
+ [Core network policy examples](cloudwan-policy-examples.md)