AWS Transit Gateway

AWS Transit Gateway Block Diagram

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Steps to configure the transit gateway across the AWS VPCs :

1. Create 3 or more VPCs on the AWS cloud accounts and then assign the Internet gateways , Routing Tables & the Subnets on each of the VPVs

2. Create the transit gateway on the AWS VPC dashboard and then select transit gateway attachments and create attachments for each VPC to enable connections over all

3. Add the routs in the VPC RTs like :

<VPC CIDR> as Destination and Transit Gateway as the source

once this step is done all the VPCs will be reachable and inter VPC connection will also work

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Here we have sucessfully configured the VPC Transit Gateway on AWS