Need help with a DNS config for a cluster

Jim Reid jim at rfc1035.com
Fri Jul 28 13:28:07 UTC 2000


>>>>> "Craig" == Spam Eater <wallop at os.com> writes:

    Craig> A white paper from Coyote Point claims that DNS can be
    Craig> configured to return multipl IPs (which it can), but they
    Craig> also say it can be configured in such a way that the client
    Craig> will try a second IP if the first one returned is not
    Craig> available.  I can't figure out how to do that. The best I
    Craig> can do is get my DNS to do round-robin which doesn't do any
    Craig> good if one of the returned addresses is unreachable.  How
    Craig> can I get it so the client tries all configured IPs?

Er,.... fix the client code to try all the addresses returned by the
DNS lookup? Some applications do this already. Others are stupid and
will only try the first address that the DNS returns. The problem you
discuss is an application issue, not a DNS one. After the name server
has sent its answer - with addresses in some order (or not) - it's no
longer a DNS issue. The application has to decide what it does with
that answer.



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