Is it better to have a single Direct Connect Gateway or multiple Direct Connect Gateways?

Question

I'm trying to connect multiple VPCs (VPC-A, VPC-B) and multiple data centers (DC-A, DC-B) using Direct Connect Gateway (DCGW).

Which of the following configurations is better? Is it better to have a single Direct Connect Gateway or multiple Direct Connect Gateways?

VPC-A, VPC-B <-> DCGW <-> DC-A, DC-B

VPC-A, VPC-B <-> DCGW-A <-> DC-A
VPC-A, VPC-B <-> DCGW-B <-> DC-B

Brettski-AWS · Accepted Answer

Short answer: It doesn't matter. If it were me, I'd go with a single Direct Connect Gateway.

More information is available [in this blog post](https://aws.amazon.com/blogs/networking-and-content-delivery/creating-active-passive-bgp-connections-over-aws-direct-connect/) but it comes down to Direct Connect Gateway being highly redundant and acting as a BGP route reflector rather than being in the packet path.

iwasa · Answer

Share what you have learned.  
2 is impossible. It is not possible to attach multiple Direct Connect Gateways to one VPC-VGW. Therefore, 1 is the answer to this question.

Is it better to have a single Direct Connect Gateway or multiple Direct Connect Gateways?

Relevant content