Connect Multiple VPCs with Transit Gateway

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Connect Multiple VPCs with Transit Gateway

In this lab, we are going to connect two VPCs via a transit gateway and adjust route tables to establish private connectivity. This is important, as it will allow communication to flow through your private network without traversing the public internet.

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Lab Info

Level

Intermediate

Last updated

Sep 21, 2025

Duration

30m

Challenge

Create a Transit Gateway

Create a transit gateway to allow communication between the two VPCs.
Challenge

Attach the Transit Gateway to Both VPCs

Attach the transit gateway to be associated with both VPCs.
Challenge

Edit Route Tables

Edit the route tables of both VPCs to establish private connectivity. Make sure the project-rtb-private1-us-east-1a route table has a destination CIDR block of 10.0.0.0/16.
Challenge

Create a VPC
Create a new VPC that we will be using for connections in this lab. Under VPC Settings, set the following parameters:
- Auto-generate: Make sure the box is checked.
- **For the value of the name tag, use project.
- IPv4/CIDR block: Enter 172.21.0.0/16 (or anything you want besides the default CIDR block).
- Number of Availability Zones: Select 1.
- Number of public subnets: Select 0.
- Number of private subnets: Select 1

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