Transit Gateway Configuration Guide

What is a Transit Gateway? A Transit Gateway is a network transit hub that enables you to connect multiple VPCs, VPNs, and on-premises networks to streamline network connectivity and management within your AWS infrastructure. How does a Transit Gateway Work? Transit Gateways act as a central hub for routing traffic between connected networks. They simplify network architecture by providing a single point of entry and exit for traffic, reducing the need for complex VPC peering configurations. Setting Up a Transit Gateway To set up a Transit Gateway: Navigate to the Transit Gateway Console: Access the AWS Management Console and navigate to the Transit Gateway service. Create a Transit Gateway: Click on "Create Transit Gateway" and provide details such as name, description, and Amazon side ASN (Autonomous System Number). Add Attachments: Attach VPCs, VPN connections, and Direct Connect gateways to the Transit Gateway to establish connectivity. Configure Route Tables: Define route tables to specify how traffic should be routed between attached networks. Propagation of Routes: Propagate routes from attached VPCs or VPN connections to ensure proper routing of traffic. Associate Subnets: Associate subnets from attached VPCs with the Transit Gateway to enable communication between resources. Testing and Validation: Test connectivity between resources in different networks to ensure proper routing through the Transit Gateway. Benefits of Using a Transit Gateway Simplified Network Architecture: Transit Gateways simplify network connectivity by providing a centralized hub for routing traffic. Scalability: They support the connection of thousands of VPCs and on-premises networks, allowing for scalable network expansion. Cost-Effective: Transit Gateways eliminate the need for multiple VPN connections and complex VPC peering arrangements, reducing operational costs. Considerations Data Transfer Costs: Data transfer costs may apply for traffic traversing the Transit Gateway between regions or across AWS services. High Availability: Deploy Transit Gateways across multiple Availability Zones for high availability and fault tolerance. By leveraging Transit Gateways, you can establish a scalable and efficient network architecture in AWS, facilitating seamless communication between VPCs, VPNs, and on-premises networks. Happy networking with Transit Gateways!

Apr 17, 2025 - 16:41

What is a Transit Gateway?

A Transit Gateway is a network transit hub that enables you to connect multiple VPCs, VPNs, and on-premises networks to streamline network connectivity and management within your AWS infrastructure.

How does a Transit Gateway Work?

Transit Gateways act as a central hub for routing traffic between connected networks. They simplify network architecture by providing a single point of entry and exit for traffic, reducing the need for complex VPC peering configurations.

Setting Up a Transit Gateway

To set up a Transit Gateway:

Navigate to the Transit Gateway Console: Access the AWS Management Console and navigate to the Transit Gateway service.
Create a Transit Gateway: Click on "Create Transit Gateway" and provide details such as name, description, and Amazon side ASN (Autonomous System Number).
Add Attachments: Attach VPCs, VPN connections, and Direct Connect gateways to the Transit Gateway to establish connectivity.
Configure Route Tables: Define route tables to specify how traffic should be routed between attached networks.
Propagation of Routes: Propagate routes from attached VPCs or VPN connections to ensure proper routing of traffic.
Associate Subnets: Associate subnets from attached VPCs with the Transit Gateway to enable communication between resources.
Testing and Validation: Test connectivity between resources in different networks to ensure proper routing through the Transit Gateway.

Benefits of Using a Transit Gateway

Simplified Network Architecture: Transit Gateways simplify network connectivity by providing a centralized hub for routing traffic.
Scalability: They support the connection of thousands of VPCs and on-premises networks, allowing for scalable network expansion.
Cost-Effective: Transit Gateways eliminate the need for multiple VPN connections and complex VPC peering arrangements, reducing operational costs.

Considerations

Data Transfer Costs: Data transfer costs may apply for traffic traversing the Transit Gateway between regions or across AWS services.
High Availability: Deploy Transit Gateways across multiple Availability Zones for high availability and fault tolerance.
By leveraging Transit Gateways, you can establish a scalable and efficient network architecture in AWS, facilitating seamless communication between VPCs, VPNs, and on-premises networks.

Happy networking with Transit Gateways!