Joel D. Kraft
Guest
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 Posted:
Fri Nov 11, 2005 5:50 pm Post subject:
DNS Failover? |
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I am having a problem with DNS in my AD domain, and was hoping
that someone might point me in the right direction about what
is hopefully just a configuration problem.
I have two domain controllers in my domain, and each of them
is running AD integrated DNS. In my whois record, they are
showing up like so:
ns3.mydomain.com
ns2.mydomain.com
The problem is that ns3 has not been very reliable lately.
Every month or so it loses network connectivity. I would expect
things to attempt to contact ns2 at that point and continue on
its merry way. But instead, the whole domain pretty much shuts
down since it cannot resolve names.
Due to a corporate policy, client machines do not point
directly at either of these two servers for their DNS, so we
are going through a third server to resolve names.
Could there be some caching issue going on where these third-
party servers are caching only one address and passing it on?
nslookup always gives me both addresses. Or are clients just
not trying the second server? Would it be best to try to
change the order of the two servers in the master DNS?
ANy insight is appreciated!
Joel |
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