# Create a peering in an AWS Cloud WAN core network
<a name="cloudwan-peerings-create"></a>

Create a transit gateway peering.

**Important**  
Before creating a peering, make sure that the account you use to create the peering has the following permissions:  
`ec2:CreateTransitGatewayPolicyTable`
`ec2:AcceptTransitGatewayPeeringAttachment`
`ec2:AssociateTransitGatewayPolicyTable`

**To create a peering**

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 **Global networks**.

1. On the **Global networks** page, choose the global network ID.

1. Under **Core network** in the navigation pane, choose **Peerings**.

1. Choose **Create peering**.

1. (Optional) Enter a **name** identifying the peering.

1. From the **Edge location** dropdown list, choose the edge location where the peering is located.

1. From the **Transit gateway** dropdown list, choose a transit gateway to be used for the peering.
**Note**  
The core ASN and the transit gateway ASN must be unique. ASNs must be unique for peerings to succeed.

1. Choose one of the following **Associate policy table** options:
   + **New** — Creates a new policy routing table.
   + **Existing** — Allows you to associate this peering with an existing policy table. If you choose this option, you'll be prompted to choose an existing **Transit gateway policy table** to associate with the peering. For information on creating a transit gateway policy table, see [Transit Gateway policy tables](https://docs.aws.amazon.com/vpc/latest/tgw/tgw-policy-tables.html) in the *AWS Transit Gateway Guide*.

1. (Optional) If the transit gateway is not registered in your global network, choose **Register the specific transit gateway to the global network** to simultaneously register the transit gateway to the global network. If your transit gateway is already registered, this option does not display.

1. (Optional) In the **Tags** section, add **Key** and **Value** tags to help identify this resource. You can add multiple tags by choosing **Add tag**, or remove any tag by choosing **Remove tag**.

1. Choose **Create peering**.

   The **Create peering progress** displays the current status of the peering deployment. When deployment is complete, the **State** of the peering on the **Peerings** page displays **Available**. You can then use this peering to create a transit gateway route table attachment. See [Transit gateway route table attachments in AWS Cloud WAN](cloudwan-tgw-attachment.md)