Create Transit Gateway Attachment

At this section, we create Transit Gateway Attachment for each VPCs.

  1. Access VPC, Transit Gateway, Create Transit Gateway Launch Template
  2. Fill name tag, choose Transit gateway just created, Attachment type VPC. At VPC Attachment choose VPC need to attachment, all the subnet of vpc will show up and i just create 1 subnet for each VPC so we don’t need to specify subnet for it. Select Create Transit Gateway Attachment. launch Template
  3. Do the same with other VPCs.