137. Transit Gateway Explained

In this episode, David Lynam provides an overview of AWS Transit Gateway, which aims to simplify complex network connectivity between VPCs, VPNs, and on-premises networks. We discuss the limitations of using VPC peering and the benefits Transit Gateway provides through its hub-and-spoke model. The main components of Transit Gateway are explained, including attachments, route tables, associations, and route propagation. We go through some example use cases like sharing Transit Gateways across accounts, network isolation for compliance, routing traffic through security services, and bandwidth/scaling capabilities. AWS Bites is brought to you by fourTheorem! Sometimes, AWS is overwhelming and you might need someone to provide clear guidance in the fog of cloud offerings. That someone is fourTheorem. Check them out at fourtheorem.com. 🔖 Chapters: 00:00 Introduction to complex networking and need for Transit Gateway 01:27 Overview of VPCs, subnets, route tables 05:54 Transit Gateway as managed hub-and-spoke network 07:01 Main components of Transit Gateway 08:22 Example setup with 3 VPCs attached to shared Transit Gateway 13:18 Use cases like network isolation and routing through security services 15:16 Pricing and limits of Transit Gateway In this episode, we mentioned the following resources: - How Amazon VPC Transit Gateways work: https://docs.aws.amazon.com/vpc/latest/tgw/how-transit-gateways-work.html#TGW_Scenarios