Introducing AWS Transit Gateway
AWS Transit Gateway is a network service using which customers can connect their on-premises VPC using a single gateway. A transit gateway works like a virtual router, and you can connect the following resources to your transit gateway:
- One or more VPCs
- One or more VPN connections
- One or more direct connections
- One or more transit gateway peering connections
The following diagram shows the workflow of AWS Transit Gateway:
Figure 3.31 – AWS Transit Gateway
The features of AWS Transit Gateway are as follows:
- It can scale horizontally (for example, three VPN connections every 1.25 Gbps combined will give 3.75 Gbps).
- It can scale up to 5,000 VPCs.
- It uses hub-and-spoke network topology.
- 50 Gbps of max throughput tested by AWS so far.
- Support for direct connections.
- Supports 10,000 routes in each route table (for VPC, the limit is 100).
