Using multiple A-records for my domain - do web browsers ever try more than one?
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Jonas
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Published on 2011-03-19T21:58:02Z
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2011/03/20
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If I add multiple A-records for my domain, they are returned in a round robin order by DNS-servers.
E.g:
1.1.1.1 A example.com
1.1.1.2 A example.com
1.1.1.3 A example.com
But how does webbrowsers react if the first host (1.1.1.1) is down (unreachable)? do they try the second host (1.1.1.2) or do they return a error message to the user? Are there any difference between the most popular browsers?
If I implement my own application, I can implement so that the second is used in case the first is down, so it's possible. And this would be very helpful to create a fault tolerant website.
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