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DFS Namespace Server Referral Ordering

Posted on 2009-05-05
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Last Modified: 2012-06-21
Hello All

I'm attempting to create file server redundancy in my company by using DFS to mirror data on a number of shared folders. This in itself is straight forward, but I'm working to eliminate the problem of having two people working on the same document at once. I think I've got a solution, but it's not behaving entirely right. The two servers I'm using are running Windows Server 2k3 Standard edition, one is R2 SP2, the other is the original release (not R2) SP2. Following these directions: http://technet.microsoft.com/en-us/library/cc758992.aspx I've overriden the referral ordering on the one server to be "first among all targets" and the other to "last among all targets". Now when I attempt to connect to the namespace, approx. 50-75% of the clients connect to the correct server (the one set to "first..."), while the remainder connect to the incorrect machine. I've attempted using dfsutil /pktflush and /purgemupcache then reconnecting, but it is not always successfull. I believe targets are still being randomly chosen. Any suggestions on how to point clients to a single server during normal operation? I know I could disable the referral to the 2nd machine, but that would require manual intervention in the event of a failure. Assistance would be appreciated, thanks in advance.
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Question by:jostafew
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by:OriNetworks
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On the client machines you could try ipconfig /flushdns becuase it may be caching the original IP address that it used when it did the first lookup before you made the change.
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I believe things may be behaving now, I suspect the system needed more time to send the dfs configurations to settle in. This morning I come back and the couple machines that were misbehaving pulled the proper dfs target after a /pktflush, /purgemupcache, and a restart. Thanks for the suggestion with the /flushdns, I'll keep that in mind.
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