We now are ready to start our connectivity and routing policy. Run CloudFormation template 2.tgw-csr.yaml to deploy the Transit Gateway, route Tables, and the Datacenter Router (Juniper SRX).
For the Specify stack details give the stack a name (compounded names work well. i.e. if the VPC stack created in the setup module was named TGW1 name this stack TGW1-SRX), pick the keypair you created earlier, and enter the name of your first stack (must be entered exactly to work). Click Next.
For Configuration stack options we don’t need to change anything, so just click Next in the bottom right.
Scroll down to the bottom of the Review name_of_your_stack and check the I acknowledge the AWS CloudFormation might create IAM resources with custom names. Click the Create button in the lower right.
wait for the Stack to show Create_Complete.