Using multiple A-records for my domain - do web browsers ever try more than one?
Posted
by
Jonas
on Pro Webmasters
See other posts from Pro Webmasters
or by Jonas
Published on 2011-03-19T21:58:02Z
Indexed on
2011/03/20
0:17 UTC
Read the original article
Hit count: 395
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.
© Pro Webmasters or respective owner
