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Cross-Site Active Directory Login

Posted on 2011-03-16
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Last Modified: 2012-05-11
We run a windows 2003 server domain.

We have two sites, site A and site B. They proper routes are setup between them.
Each site has 1 domain controller.

If the domain controller in site A goes offline, users are unable to login.

I would like to change it so that if the domain controller in site A goes offline, users are still able to login using the domain controller over at SITE B.

How do i make this change?
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Question by:HADDADD3
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5 Comments
 
LVL 57

Expert Comment

by:Mike Kline
ID: 35150813
That should happen by default, are both DCs global catalog servers?  Are you running DNS on both servers and are clients using both IPs in their DNS configuration.

You say the route is setup so I'm assuming no firewall/port issues.

Thanks

Mike
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Author Comment

by:HADDADD3
ID: 35150828
- No firewall / route issues
-Both run a DS server

-Clients @ site A only have site A DNS server, not SITE b DNS server as well.

Could that be problem?
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LVL 57

Accepted Solution

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Mike Kline earned 2000 total points
ID: 35150847
Yes, add the site B DNS server to site A's clients (add it as secondary).   Do the reverse for site A.

Thanks

Mike
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Author Comment

by:HADDADD3
ID: 35150861
Any way to test without having to take site A DC offline?
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LVL 11

Expert Comment

by:RickSheikh
ID: 35151857
Not sure if it is. Unless you mess with the SRV records' weight. But I am sure Mike may have an alternative.
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