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Repairing AWS Transit Gateway Route Propagation
In this lab, you will inspect the Transit Gateway attachments, route-table associations, propagations, and learned routes for the Management, Development, and Production VPCs. You will compare the working Development path with the failed Production path to identify the missing route propagation affecting connectivity. You will then apply the minimum required correction to the Management Transit Gateway route table and verify that the Production route is learned successfully. Finally, you will test connectivity from the management instance to both web servers to confirm that Production access has been restored while the existing Development path remains unchanged.
Lab Info
Table of Contents
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Challenge
Confirm the Transit Gateway attachment states
- Review the Transit Gateway attachments for the Management, Production, and Development VPCs.
- Confirm the attachments are available and rule out an attachment-level fault.
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Challenge
Inspect the Transit Gateway route configuration and identify the fault
- Review the route-table associations and propagations for Development, Production and Management.
- Compare the Production routing configuration with the working Development path.
- Identify propagation routing failure in Management routing
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Challenge
Repair the Transit Gateway route configuration
- Apply the minimum correction required to restore the Production path.
- Confirm the corrected route-table configuration becomes active.
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Challenge
Validate restored connectivity and existing routing
- Confirm connectivity from the Management instance to the Development web server remains functional.
- Confirm connectivity from the Management instance to the Production web server has ben restored.
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