Preparation

In this step we will deploy resources such as VPC, EC2 instance, AWS Transit Gateway and route table within ap-southeast-1 (Singapore) region.

CloudFormation Stack

This step is very similar to the preparation step of previous section, with just few things to note:

• Use VPC.yaml file

Fill in the parameters as follows:

• Stack name: BranchVPC
• EC2InstanceAMIId: AMI ID of Amazon Linux 2023
• SubnetCidr: 10.4.0.0/24
• VPCCidr: 10.4.0.0/16
• VPCPrefix: branch

Transit Gateway

1. Access to VPC service, navigate to Transit gateways then click Create transit gateway

Configure the transit gateway as follows:

• Name tag: singapore-tgw
• Description: Transit Gateway for region Singapore
• Uncheck Default route table association and Default route table propagation

2. Create a transit gateway attachment with the following configuration

• Name tag: branch-att
• Transit gateway ID: Select singapore-tgw
• Attachment Type: VPC
• VPC ID: Select branch-vpc

3. Create transit gateway route table and association

• Within the Transit gateway route tables interface of the Singapore region, click Create transit gateway route table

• Set the configuration as follows:

  • Name tag: branch-tgw-rtb
  • Transit gateway ID: singapore-tgw

  

After creating branch-tgw-rtb, select Associations tab and click Create association then associate with branch-att attachment.