# Installation strategies
<a name="strategies"></a>

If you have specific customization requirements in networking, security, and other areas, see the following table for guidance. For more information, see [Installing on AWS](https://docs.redhat.com/en/documentation/openshift_container_platform/4.7/html/installing/installing-on-aws) in the Red Hat OpenShift documentation.


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| Installation scenario | IPI | UPI | Notes | 
| --- | --- | --- | --- | 
| Fast cluster installation | ✓ |  | You can use Red Hat OpenShift on AWS.<br />[More information](https://docs.redhat.com/en/documentation/openshift_container_platform/4.7/html-single/installing/index#prerequisites) | 
| Customized cluster | ✓ | ✓ | You can install with some of the customization options provided by the installer (such as `rosa-cli`). This scenario is suitable for both IPI and UPI. Use UPI if you need further customizations.<br />[More information](https://docs.redhat.com/en/documentation/openshift_container_platform/4.7/html-single/installing/index#installing-aws-customizations) | 
| Cluster with network customizations | ✓ | ✓ | By using IPI, you have the flexibility to specify an existing IP range in the `install-config.yaml` file.<br />[More information](https://docs.redhat.com/en/documentation/openshift_container_platform/4.7/html-single/installing/index#installing-aws-network-customizations) | 
| Cluster in an existing VPC |  | ✓ | You can provision the cluster in an existing VPC and network infrastructure. For better flexibility, use UPI.<br />[More information](https://docs.redhat.com/en/documentation/openshift_container_platform/4.7/html-single/installing/index#installing-aws-vpc) | 
| Private cluster in an existing VPC |  | ✓ | If you have a security requirement to host the cluster on a private network, with no access to the internet, you might have to set up private hosted zones and configure route tables carefully. For this scenario, UPI provides better flexibility.<br />[More information](https://docs.redhat.com/en/documentation/openshift_container_platform/4.7/html-single/installing/index#installing-aws-private) | 
| AWS infrastructure that you provision |  | ✓ | Use UPI to create the underlying infrastructure components and resources by using CloudFormation templates.<br />[More information](https://docs.redhat.com/en/documentation/openshift_container_platform/4.7/html-single/installing/index#installing-aws-user-infra) | 
| Using an internal mirror |  | ✓ | You can mirror the contents of your local registry and install from there. However, you still need internet access to access AWS APIs. <br />[More information](https://docs.redhat.com/en/documentation/openshift_container_platform/4.7/html-single/installing/index#installing-restricted-networks-aws) |