Configure a core network

The following steps guide you through configuring a core network for a policy version using the Policy versions link on the AWS Network Manager console. For more information about a core network in a policy version, see Network configuration.

To configure network for a policy version

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

2. Under Connectivity choose Cloud WAN.

3. 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.

4. In the navigation pane, choose Policy versions.

5. Choose Create policy version.

6. In Choose policy view mode, choose Visual editor.

7. The Network configuration displays general settings for the policy.

8. In General settings, choose Edit.

   1. The Version can't be changed for a policy version.

   2. Choose VPN ECMP support if the core network should forward traffic over multiple-cost routes using VPN.

   3. Choose Edit general settings.

9. In the ASN ranges section, do the following:

   1. Choose Create.

   2. For ASN range, enter the ASN range for the policy version. For example, enter 64512-65334.

      Note

      The ASN range is left-closed and right-open. This means that the leftmost number is included in the range but the rightmost number is not. For example, if you choose an ASN range of 64900-64903, the actual available ASN range is 64900 through 64902. 64903 is not included.

   3. Choose Create ASN range.

10. In the Inside CIDR blocks section, do the following:

    1. Choose Create.

    2. For CIDR, enter the CIDR block that you want to use for BGP peering on Connect peers.

    3. Choose Create inside CIDR block.

11. In the Edge locations section, do the following:

    1. Choose Create.

    2. From the Location dropdown list, choose the Region where you want the Core Network Edge router to be created. You can choose only one Region.

    3. For ASN, enter the ASN number for the Region.

       Note

       You can't change the ASN of a Core Network Edge. Any transit gateway with the same ASN can't be peered to that Core Network Edge. For example, if you have a Core Network Edge with an ASN of 64512, you can't peer any transit gateway that also has an ASN of 64512.

    4. For Inside CIDR block, enter the CIDR block that you want to use for BGP peering on Connect peers. You can enter multiple CIDR blocks by choosing Add for each block that you want to add. Choose Remove for any block that you don't want.

       Note

       You can't leave any blank destination CIDR blocks. Choose Remove to delete any empty blocks.

    5. Choose Create edge locations.