I have two ISP accounts and host a web server on the faster account. If it goes down, I want users to go to the web server on the slower connection. Each has an A record listed for public DNS but I notice that the records get round robined thus sending users to both sites. I only want users to visit the server on slow connection IF the fast connection is down.
I was hoping to set a preference on the records but it looks like setting preference is not an option for A records. Any ideas on how to accomplish the above?