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DC Failover Fail

Posted on 2012-03-09
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Last Modified: 2012-03-12
FNG here....

Why is it that I have 2 DC’s which are failovers of each other, but when I bring DC1 down (which is the master essentially) I have AD problems.  For instance, I just rebooted DC1 because it should have no impact on the network as we have DC2 as the failover DC, and yet I just tried to send an email and my Exchange Server complained back to my Outlook client that it lost connection to DC1.  

Thanks for any ideas on what my problem may be.
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Question by:SSNYT
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by:Darius Ghassem
ID: 37703420
Is DC2 a Global Catalog?

Run dcdiag to check health of DCs.
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by:SSNYT
ID: 37703489
yes it is a global catalog, it points to DC1 and DC1 points to DC2.

health is good, only failures are with advertisement of time and systemlog tests.
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by:Darius Ghassem
ID: 37703551
Alright what versions of Windows and Exchange are you running?

Time is one issue. If you are failing advertising that means the server is not advertising as a DC.
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by:SSNYT
ID: 37703695
both are running server 2k3 service pack 2.  

exchange server 2k3 sp2 (6.5.7638.1)

yeah, DC2 failed its test in advertising it was a time server.  that would cause this problem?  it seems totally unrelated.
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Expert Comment

by:Darius Ghassem
ID: 37703829
Failing anything could be the problem.
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by:SSNYT
ID: 37712218
so what would be your recommendation?  demote and promote the dc?
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Darius Ghassem earned 500 total points
ID: 37712329
Post the whole dcdiag
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by:SSNYT
ID: 37712343
thanks, i demoted and promoted.  that seems to have cleared the issue and resolved my problem.
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