description AWS Transit Gateway Peering Overview
While Transit Gateway is the superior solution, understanding basic VPC Peering is necessary for smaller, less complex DR scenarios. Peering connects two VPCs directly, allowing them to communicate as if they were on the same network. For DR, this is suitable when only two or three tightly coupled services need to failover between regions, keeping the networking scope minimal and simple.
help AWS Transit Gateway Peering FAQ
What is AWS Transit Gateway Peering?
Transit Gateway Peering connects two AWS Transit Gateways so networks attached to them can communicate across Regions or separate network domains. It is intended for larger network designs than a simple connection between two VPCs.
How is Transit Gateway Peering different from VPC Peering?
VPC Peering creates a direct connection between two VPCs, while Transit Gateway Peering links transit hubs that can each serve many attached networks. Transit Gateway Peering is therefore more useful when the architecture has multiple VPCs or Regions.
Can VPC Peering be enough for a small disaster-recovery design?
It can be suitable when only two VPCs need to communicate and the design is simple. Larger environments usually need a hub-based approach to avoid managing many separate peering connections.
Why would a company use Transit Gateway Peering across AWS Regions?
It can connect regional network hubs while keeping the overall topology easier to manage than many individual VPC links. The exact routing, supported traffic, and cost depend on the AWS design and Region pair.
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