NEW - You can now accelerate your migration and modernization with AWS Transform. Read [Getting Started](https://docs.aws.amazon.com/transform/latest/userguide/getting-started.html) in the *AWS Transform User Guide*.

# Preparing for test and cutover instance launch
<a name="launch-preparation"></a>

Prior to launching your instances, you must ensure that your environment is set up properly to ensure successful launches. Check the following prior to continuing:


+ Prepare your subnets for launch - Plan which subnets you will use to launch your test and cutover instances. You use these subnets in your EC2 launch template when you configure your Launch settings. 
+ Create security groups within the subnets - Create the Security groups you want to use within your prepared subnets. You set these Security groups in your EC2 Launch template when you configure launch settings.

**Note**  
Customers that want to run a proof of concept can skip this step. AWS Application Migration Service automatically uses the default subnet and Security groups. Make sure that you have not deleted your default subnet.