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I'm seeking some clarification regarding the RackConnect 3 API retained public IP addresses: https://support.rackspace.com/how-to/rackconnect-v30-retained-public-ip-addresses/
If I'm understanding this correctly, this would allow me to take the public IP address assigned to an existing cloud server, and mark it as retained. So that, if that cloud server were to go away, the public IP address it used would be able to be assigned to a new server.
Is this correct? And are there any caveats or exceptions where this wouldn't be the case?
When you move a retained public IP address from one cloud server to another, the destination server must not have an existing public IP address at the time of assignment. If the destination server has a public IP address assigned, the API returns a message indicating that it could not assign the new public IP address. The API call fails until the destination server’s existing public IP address assignment is removed.