# Get started with AWS Global Networks for Transit Gateways
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The following tasks help you become familiar with AWS Global Networks for Transit Gateways. For more information about how AWS Global Networks for Transit Gateways works, see [How AWS Global Networks for Transit Gateways works](how-gnw-works.md).

In this example, you create a global network and register your transit gateway with the global network. You can also define and associate your on-premises network resources with the global network.

**Topics**
+ [Prerequisites](#network-manager-prerequisites)
+ [Step 1: Create a global network](#getting-started-create-global-network)
+ [Step 2: Register your transit gateway](#getting-started-register-tgw)
+ [Step 3: (Optional) Define and associate your on-premises network resources](#getting-started-define-wan)
+ [Step 4: (Optional) Enable multi-account access](#getting-started-multi-account)
+ [Step 5: View and monitor your global network](#getting-started-view-global-network)

## Prerequisites
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Before you begin, ensure that you have a transit gateway with attachments in your account or in any account within your organization. For more information, see [Getting Started with Transit Gateways](https://docs.aws.amazon.com/vpc/latest/tgw/tgw-getting-started.html).

The transit gateway can be in the same AWS account as the global network or in a different AWS account within the organization.

## Step 1: Create a global network
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Create a global network as a container for your transit gateway.

**To create a global network**

1. Open 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. Choose **Create global network**.

1. Enter a name and description for the global network, and choose **Create global network**.

## Step 2: Register your transit gateway
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Register a transit gateway in your global network.

**To register the transit gateway**

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. In the navigation pane, choose **Transit gateways**, and then choose **Register transit gateway**.

1. From the **Select account** dropdown list, choose the account that you want to register the transit gateway from.

   A list of transit gateways from that account appear in the **Select transit gateway to register** section.

1. Select one or more transit gateways from the list, and then choose **Register transit gateway**.

## Step 3: (Optional) Define and associate your on-premises network resources
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You can define your on-premises network by creating sites, links, and devices to represent objects in your network. For more information, see the following procedures:
+ [Create a site using AWS Network Manager](creating-a-site.md)
+ [Adding a link](nm-site-link-add.md)
+ [Add a device using AWS Network ManagerDelete a device using AWS Network Manager](nm-devices-add.md)

  You associate the device with a specific site, and with one or more links. For more information, see [Associate or disassociate a device link using AWS Network Manager](nm-device-link-associate.md).

On your transit gateway you can 
+ Create a Site-to-Site VPN connection attachment. For more information, see [Customer gateway associations](gw-association.md#cgw-associations). 
+ Create a transit gateway Connect attachment, and then associate the Connect peer with the device. For more information, see [Add a Connect peer association using AWS Network Manager](connect-peer-association.md).

You can also work with one of our Partners in the AWS Partner Network (APN) to provision and connect your on-premises network. For more information, see [AWS Network Manager](https://aws.amazon.com/transit-gateway/network-manager).

## Step 4: (Optional) Enable multi-account access
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Enable multi-account access to register transit gateways from multiple accounts, allowing you to view and manage transit gateways and associated resources from those registered accounts in your global network. Onboarding to AWS Organizations is a prerequisite for enabling multi-account access for Network Manager.

1. Create your organization using AWS Organizations. 

   If you've already done this skip this step. For more information on creating an organization using AWS Organizations, see [Creating and managing an organization](https://docs.aws.amazon.com/organizations/latest/userguide/orgs_manage_org.html) in the *AWS Organizations User Guide*.

1. Enable multi-account on the Network Manager console. 

   This enables trusted access for Network Manager and allows for registering delegated administrators. For more information enabling trusted access and registering delegated administrators, see [Multi-account in AWS Global Networks for Transit Gateways](nm-multi-account.md).

1. Create your global network. 

   For more information on creating a global network, see [Create a global network using AWS Network Manager](global-networks-creating.md).

1. Register transit gateways.

   With multi-account enabled, you can register transit gateways from multiple accounts to your global network. For more information about registering transit gateways, see [Transit gateway registrations in AWS Global Networks for Transit Gateways](tgw-registrations.md). 

## Step 5: View and monitor your global network
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The Network Manager console provides a dashboard for you to view and monitor both your transit gateway network objects in your global network.

**To access the dashboard for your global network**

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. The **Overview** page provides an inventory of the objects in your global network for your transit gateway network. For more information about the pages in the dashboard, see [Access transit gateway network dashboards using AWS Network Manager](nm-monitoring-console.md).