Hello @Tony-Sydney-AU Thank you for your detailed explanation and recommendations. Regarding the suggestion to use BGP: On the MX side, we understand that we could proceed with the configuration, however on the AWS side there is currently no dedicated AWS engineer available. The customer is only running a few basic EC2 instances and does not have the resources or expertise to manage Transit Gateway BGP configuration. This is also outside the scope of our current support responsibility, so implementing BGP on AWS would be difficult at this time. Concerning the firmware version: You mentioned that multlink active-active requires firmware 19.2.2 or later. In our dashboard, version 19.2.2 is not selectable, but 19.2.4 (RC) is available. The customer has expressed concerns about running a Release Candidate version in a production environment. Could you please advise whether 19.2.4 RC is considered sufficiently stable compared to a general release, especially for production use? Any guidance on the risk level or real-world stability would be very helpful for us to address the customer’s concerns. Thank you again for your insights and support. Kind regards, Jinsoo Park
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