AWS Transit Gateways - Learning made simple

AWS Transit Gateways - Learning made simple

In this tutorial, we will make simple to learn AWS Transit Gateways. The AWS transit gateway saves us the effort of creating multiple VPC peering connections between all the existing VPCs. And establishing VPN tunnels between the on-premise network and each individual VPC, in order to establish connectivity.

transit gateway  is a network transit hub. It allows us to interconnect our virtual private clouds (VPCs) and the on-premises networks. The AWS transit gateway saves us the effort of creating multiple VPC peering connections between all the existing VPCs. And establishing VPN tunnels between the on-premise network and each individual VPC, in order to establish connectivity.

Imagine a scenario with four VPCs,

As depicted above, this is how a VPC mesh would look like. Now, consider the same situation with hundreds and thousands of VPCs in a network. Without transit gateways, maintaining such a complex infrastructure is a tedious task. The transit gateway, as the name suggests, acts as a universal gateway for all of the resources.

We can think of TGW as a big cloud provider. It is responsible for sending traffic across multiple regions over a secure, available, and high-performance AWS global network.

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