Microsoft KB Archive/164812

= Computer Name Truncated When Name Resolution Attempted =

Article ID: 164812

Article Last Modified on 11/1/2006

-

APPLIES TO


 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 3.51
 * Microsoft Windows NT Server 4.0 Standard Edition

-



This article was previously published under Q164812



SYMPTOMS
When name resolution for the Primary Domain Controller (PDC) is required over any of the installed network protocols bound to NetBIOS, and the PDC's machine name is 14 characters or longer, the name queries truncate the computer name to 13 characters, and a negative response occurs. As a result, you may experience one or more of the following:
 * Extra network traffic
 * Long response time with some domain operations
 * Administrative Tools unusable
 * Unable to change domain passwords

Name queries that are formatted for broadcast, WINS, and DNS are all affected by this problem.



CAUSE
The NetGetDCName Win32 API is used to retrieve the name of the PDC on a domain. If the PDC s name is greater than 13 characters, this API caches the local PDC name incorrectly. If a second call is made, NetGetDCName tries to connect to this invalid PDC name, causing extra network traffic and a longer response time.



STATUS
Microsoft has confirmed this to be a problem in Windows NT versions 3.51 and 4.0. This problem was corrected in the latest Microsoft Windows NT 4.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: unable locate find netlogon

Keywords: kbapi kbbug kbnetwork KB164812

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.