Last year I showed you how to Use an AWS Transit Gateway to Simplify Your Network Architecture.
Connectivity – You can reach your Transit Gateway using your connections from any of the 90+ AWS Direct Connect locations (except from AWS Direct Connect locations in China).
Using Transit Gateway & Direct ConnectI will use the freshly updated Direct Connect Console to set up my Transit Gateway for use with Direct Connect.
I return to the Direct Connect Console, find my Transit Gateway, and click Associate Direct Connect gateway:I associate the Transit Gateway with a Direct Connect Gateway in my account (using another account requires the ID of the gateway and the corresponding AWS account number), and list the network prefixes that I want to advertise to the other side of the Direct Connect connection.
Then I click Associate Direct Connect gateway to make it so:The state starts out as associating and transitions to associated.