Which solution will meet these requirements with the LEAST amount of operational overhead?
Create a transit gateway, and associate the Direct Connect connection with a new transit VIF. Turn on the transit gateway’s route propagation feature.
Create a Direct Connect gateway. Recreate the private VIFs to use the new gateway. Associate each VPC by creating new virtual private gateways.
Create a transit VPConnect the Direct Connect connection to the transit VPCreate a peering connection between all other VPCs in the Region. Update the route tables.
Create AWS Site-to-Site VPN connections from on premises to each VPC. Ensure that both VPN tunnels are UP for each connection. Turn on the route propagation feature.
Explanations:
A transit gateway allows for centralized management of VPCs, enabling communication between all VPCs and the on-premises network via a single connection. Associating the Direct Connect connection with a transit VIF simplifies the architecture and allows for easy route propagation, minimizing operational overhead.
While a Direct Connect gateway allows for connectivity to VPCs, it requires recreating VIFs and managing individual virtual private gateways for each VPC, which increases operational overhead and complexity compared to using a transit gateway.
Creating a transit VPC and peering all other VPCs is a complex and cumbersome solution, as it requires managing multiple peering connections and updating route tables for each VPC, leading to high operational overhead.
Establishing AWS Site-to-Site VPN connections for each VPC adds significant complexity and operational overhead. Managing multiple VPN connections, ensuring their availability, and route propagation would complicate the networking architecture without providing the efficiency of a transit gateway.
I guess:
Create a transit gateway, and associate the Direct Connect connection with a new transit VIF. Turn on the transit gateway’s route propagation feature.