Amazon Elastic Compute Cloud (EC2) is a web service that provides resizable compute capacity in the cloud. It is designed to make web-scale cloud computing easier for developers. One of the components you might interact with in EC2 is the Transit Gateway, which enables you to connect your Amazon Virtual Private Clouds (VPCs) and on-premises networks through a central hub.
When working with EC2 Transit Gateways, you might encounter the error code InvalidTransitGatewayRouteTableID.Malformed. This error typically appears when you attempt to specify a transit gateway route table ID that does not adhere to the expected format.
During your operations, you might see an error message similar to the following:
Error: InvalidTransitGatewayRouteTableID.Malformed - The specified transit gateway route table ID is not in the correct format.
The InvalidTransitGatewayRouteTableID.Malformed error indicates that the format of the transit gateway route table ID you provided is incorrect. Each resource in AWS has a specific ID format, and providing an incorrect format will result in this error.
To resolve the InvalidTransitGatewayRouteTableID.Malformed error, follow these steps:
Ensure that the transit gateway route table ID follows the correct format. The typical format for a transit gateway route table ID is tgw-rtb-xxxxxxxx, where xxxxxxxx is a series of alphanumeric characters.
Double-check the ID you are using for any typographical errors. Ensure there are no extra spaces or missing characters.
If you are unsure about the correct ID, you can retrieve it using the AWS Management Console or AWS CLI:
aws ec2 describe-transit-gateway-route-tables --query 'TransitGatewayRouteTables[*].TransitGatewayRouteTableId'
This command will list all transit gateway route table IDs in your account.
For more information on working with Transit Gateways, you can refer to the following resources:
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