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DNS Client Does Not Try All Servers in DNS Service List

This article was previously published under Q195611
This article has been archived. It is offered "as is" and will no longer be updated.
When a DNS query is made and the query returns an error such as serverfailure (rcode 2), the other servers in the list were not queried. Thefailure was passed back to the requester even though querying anotherserver in the list could successfully complete the query.
The only time secondary servers were queried, was when no response isreceived from the primary server in the server list.
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:
For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:
Microsoft has confirmed this to be a problem in Windows NT version 4.0. This problem was first corrected in Windows NT version 4.0 Service Pack 5.
More information
The DNS query algorithm has been modified to attempt other servers in theserver list if an error is received from a server that may be resolved bytrying another server in the list. The new algorithm will retry serversuntil:

  • The name query is answered successfully.
  • An authoritative answer is received from a server that the requestedhost does not exists (rcode 3).
  • The server list is exhausted.

Article ID: 195611 - Last Review: 11/02/2013 21:53:00 - Revision: 3.0

Microsoft Windows NT Workstation 4.0 Developer Edition, Microsoft Windows NT Server 4.0 Standard Edition, Microsoft Windows NT Server 4.0 Enterprise Edition

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