View Transit Gateway Flow Logs records in Amazon CloudWatch
You can view your flow log records using the CloudWatch Logs console or Amazon S3 console, depending on the chosen destination type. It might take a few minutes after you've created your flow log for it to be visible in the console.
To view flow log records published to CloudWatch Logs
Open the CloudWatch console at https://console.amazonaws.cn/cloudwatch/
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In the navigation pane, choose Logs, and select the log group that contains your flow log. A list of log streams for each transit gateway is displayed.
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Select the log stream that contains the ID of the transit gateway that you want to view the flow log records for. For more information, see Transit Gateway Flow Log records.