Article ID: 310339 - View products that this article applies to.
This article was previously published under Q310339
NoticeThis article applies to Windows 2000. Support for Windows 2000 ends on July 13, 2010. The Windows 2000 End-of-Support Solution Center
(http://support.microsoft.com/?scid=http%3a%2f%2fsupport.microsoft.com%2fwin2000)is a starting point for planning your migration strategy from Windows 2000. For more information see the Microsoft Support Lifecycle Policy
When the Netlogon service starts or the service is under load, the following event may be logged to the Event Log:
Event Type: Error Event Source: NETLOGON Event Category: None Event ID: 5719 Date: 9/28/2001 Time: 4:12:55 PM User: N/A Computer: Server Description: No Windows NT or Windows 2000 Domain Controller is available for domain <domain name>. The following error occurred: There are currently no logon servers available to service the logon request. Data: 0000: c000005e
One possible cause of this error is that you have run out of buffer space in the NetBT datagram buffer.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
To resolve this problem, increase the MaxDgramBuffering value from 128 KB to 256 KB:
MaxDgramBuffering DetailsKey: NetBT\Parameters
Value Type: REG_DWORD - Count of bytes
Valid Range: 0 - 0xFFFFFFFF
Default: 0x20000 (128 KB)
Description: This parameter specifies the maximum amount of memory that NetBT will dynamically allocate for all outstanding datagram send commands. After this limit is reached, further send commands will fail due to insufficient resources.
For additional information on other possible causes of this error, click the article numbers below to view the articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/259883/EN-US/ )Upgrading Windows NT 4.0 Domain Controller with FAT File System Does Not Install Active Directory
(http://support.microsoft.com/kb/269119/EN-US/ )Logging on to a Domain Does Not Work from a Windows 2000-Based RAS Client
For additional information, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/217023/EN-US/ )Event ID 5701 Starting Netlogon on Domain Controller