Hi @JinSoo_Park The 19.2.4 has demonstrated to be stable in my experience in Support Team. But in my personal opinion (not as a Meraki empolyee) is don't run RC unless I absolutely need the new feature present only in RC. Regarding BGP, TGW doesn't have BGP by itself. You would need to create a new AWS VPN endpoint this time it would be a BGP routed VPN and attach it to your TGW. But if there are only some few EC2 it looks better to avoid complexity in your solution and just run 19.1.11 and do single tunnel with fail-over. And for health-check, my personal suggestion is you check against your EC2s rather than something outside AWS. Happy New Year!
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