Updating DNS for this subdomain would take hours or days, but we'd like to be able to set up a reliable auto-failover mechanism that I think would require faster DNS changes. What is best practice for this type of arrangement?

  • 2
    Lower the TTL, and have then CNAME the subdomain at a record you control? – ceejayoz Dec 11 '20 at 21:06
  • Is it possible to do this and use Cloudflare's features for the subdomain? I've heard of delegation as a potential solution. Ideally I could control the subdomain at Cloudflare directly. – libbynotzoey Dec 11 '20 at 21:47

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