Question

A company has 12 VPCs across two AWS Regions connected using a full mesh of VPC peering connections. As the number of VPCs grows, the networking team struggles to manage the increasing number of peering connections and route table entries. They need a solution that provides centralized, scalable connectivity between all VPCs (including transitive routing) and supports future growth with minimal operational overhead. Which solution should the team implement?

Accepted Answer

Replace the VPC peering mesh with an AWS Transit Gateway in each Region and use Transit Gateway peering to connect the two Regions.

Answer

Continue using VPC peering but consolidate route table entries by summarizing CIDR ranges across all VPCs.

Answer

Deploy a NAT gateway in a central VPC and route all inter-VPC traffic through it for transitive connectivity.

Answer

Create AWS Site-to-Site VPN connections between each pair of VPCs to enable transitive routing.