Create Transit Gateway Route Tables

Overview of Route Tables

ℹ️ Information: In this section, you will create and configure a Route Table for the Transit Gateway to control traffic flow between VPCs.

Steps to Create Route Table

  1. Access VPC Management Console
    • Open AWS Management Console
    • Search for and select VPC

Create Route Table

  1. Create Transit Gateway Route Table
    • Select Transit Gateway Route Tables
    • Click Create Transit Gateway Route Table

Create Route Table

  1. Configure Route Table
    • Name tag: lab20-TGW-RT
    • Select the Transit Gateway you created
    • Click Create Transit Gateway Route Table

Configure Route Table

Configure Associations

💡 Pro Tip: Associations determine which VPCs will send traffic through the Transit Gateway.

  1. Create Association
    • Select the newly created Route Table
    • Go to the Associations tab
    • Click Create association

Create Association

  1. Add VPCs to Association
    • Add each VPC one by one
    • Ensure all 4 VPCs are added

Add VPC Add VPC Add VPC Add VPC

  1. Confirm Associations
    • Check the status of all Associations
    • Ensure they are all in Associated state

Confirm Association

Configure Propagations

ℹ️ Information: Propagations determine which VPCs will receive traffic from the Transit Gateway.

  1. Create Propagation
    • Switch to the Propagations tab
    • Click Create propagation

Create Propagation

  1. Add VPCs to Propagation
    • Add each VPC one by one
    • Ensure all 4 VPCs are added

Add VPC Propagation Add VPC Propagation Add VPC Propagation Add VPC Propagation

  1. Confirm Propagations
    • Check the status of all Propagations
    • Ensure they are all in Enabled state

Add VPC Propagation

⚠️ Warning: Both Associations and Propagations must be correctly configured for traffic to flow properly through the Transit Gateway.