AWS transit gateway 的作用
说白了，就是根据需要，来起到桥梁的作用，内部沟通，或者面向internet. 先看一下diagram 图:
最中间的就是transit gateway, 要达到不同vpc 直接通讯的目的:
The following is an example of a default transit gateway route table for the attachments shown in the previous diagram. The CIDR blocks for each VPC propagate to the route table. Therefore, each attachment can route packets to the other two attachments.
| Destination | Target | Route type |
|---|---|---|
VPC A CIDR |
Attachment for VPC A |
propagated |
VPC B CIDR |
Attachment for VP |