Final answer:
To share a Transit Gateway with another account, use AWS Resource Access Manager by creating a resource share, selecting the Transit Gateway, adding accounts, and setting permissions if needed. Once shared, the specified accounts can attach their VPCs to the Transit Gateway.
Step-by-step explanation:
To share a Transit Gateway with another AWS account, you can leverage AWS Resource Access Manager (RAM). This service allows you to share AWS resources with any AWS account or within your AWS Organization. Here is a step-by-step guide to share a Transit Gateway:
- Log into the AWS Management Console of the account that owns the Transit Gateway.
- Go to the AWS Resource Access Manager service.
- Click on Create a resource share.
- Name your resource share and select the Transit Gateway from the list of available resources.
- Add the AWS accounts or the organizational units (OU) with which you want to share the Transit Gateway.
- Set the permissions if necessary, then click on Create resource share.
Once the resource share is created, the specified accounts will be able to attach to the shared Transit Gateway using their own VPCs. It's important to manage the permissions and maintain the security posture when sharing resources across accounts.