Transit Gateway Hub-and-Spoke
Connect three VPCs through an AWS Transit Gateway to build a hub-and-spoke network with full transitive routing.

Lab Overview
Build a hub-and-spoke network on AWS using Transit Gateway. You will create three VPCs with non-overlapping CIDRs, attach them to a shared Transit Gateway, configure route tables for transitive routing, and validate that routing by inspecting the VPC and Transit Gateway route tables.
You'll learn to:
- Create multiple VPCs with non-overlapping CIDR blocks
- Provision and configure an AWS Transit Gateway
- Create Transit Gateway attachments for each VPC
- Set up route tables for transitive routing through the TGW
- Launch EC2 instances and validate transitive routing through the Transit Gateway
Key Resources:
What You'll Learn
Create multiple VPCs with non-overlapping CIDR ranges
Deploy and configure an AWS Transit Gateway
Attach VPCs to a Transit Gateway
Configure route tables for transitive cross-VPC routing
Validate end-to-end connectivity across a hub-and-spoke topology
Prerequisites
Basic AWS CLI familiarity
Understanding of IP addressing and CIDR notation
Familiarity with VPC concepts (subnets, route tables)
Technologies Covered
Part of a Course
This lab is part of the AWS Solutions Architect Associate (SAA-C03) course
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