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EC2 InvalidTransitGatewayRouteTablePropagationID.NotFound
The specified transit gateway route table propagation ID does not exist or is incorrect.
Understanding AWS Transit Gateway
AWS Transit Gateway is a service that enables you to connect your Amazon Virtual Private Clouds (VPCs) and on-premises networks through a central hub. It simplifies your network architecture by acting as a cloud router, managing traffic between your networks efficiently.
Identifying the Symptom
When working with AWS Transit Gateway, you may encounter the error code InvalidTransitGatewayRouteTablePropagationID.NotFound. This error typically arises when attempting to manage route table propagations.
Observed Error
The error message indicates that the specified transit gateway route table propagation ID does not exist or is incorrect. This can occur during operations such as creating, modifying, or deleting route table propagations.
Explaining the Issue
The error InvalidTransitGatewayRouteTablePropagationID.NotFound suggests that the system cannot find the specified propagation ID. This could be due to a typo in the ID, the propagation being deleted, or the ID belonging to a different account or region.
Common Causes
- Incorrect propagation ID entered.
- The propagation has been deleted or never existed.
- Mismatch between the region or account where the ID is being referenced.
Steps to Resolve the Issue
To resolve this error, follow these steps:
Step 1: Verify the Propagation ID
Ensure that the propagation ID is correct. You can list all propagations associated with your transit gateway route table using the AWS CLI:
aws ec2 describe-transit-gateway-route-table-propagations --transit-gateway-route-table-id
Check the output to confirm the existence of the propagation ID.
Step 2: Check for Deletion
If the propagation ID was previously valid, verify whether it has been deleted. You may need to consult your AWS CloudTrail logs to check for any deletion events.
Step 3: Confirm Region and Account
Ensure that you are operating in the correct AWS region and account. Propagation IDs are unique to the region and account they are created in.
Additional Resources
For more detailed information, refer to the official AWS documentation on AWS Transit Gateway and AWS CLI Commands.
By following these steps, you should be able to resolve the InvalidTransitGatewayRouteTablePropagationID.NotFound error and ensure smooth operation of your AWS Transit Gateway setup.
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