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AWS Transit Gateway and Multiple Accounts

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Gilles Chekroun
Lead VMware Cloud on AWS Specialist
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Many Customers start to use AWS transit Gateway and want to be able to attach VPCs un multiple accounts.
Often AWS organisations are split by departments and have separate accounts.
This blog post will go through the detailed setup for the TGW and how to connect VPCs in separate accounts.
For a complete description of VMware Cloud on AWS and TGW, please refer to here.
AWS Shared Resource ManagerLogin to the main account where the TGW was created and create a resource share
Name your share and select the TGW  Add the other account and create the share Verify the share creation Log into the account we just added and look for an invitation Accept the invitation For the purpose of the tests we can use an existing VPC or create a new one. I am using VPC4 with CIDR 99.99.0.0/16 in the added account. Create a TGW attachment for this new VPC At this stage, we will get a "pending acceptance" status. Go back to the main account and accept Check a…