Microsoft KB Archive/310339

= PRB: Netlogon Logs Event ID 5719 on a Domain Controller =

Article ID: 310339

Article Last Modified on 3/2/2007

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server

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This article was previously published under Q310339



IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry



SYMPTOMS
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. The following error occurred: There are currently no logon servers available to service the logon request. Data: 0000: c000005e



CAUSE
One possible cause of this error is that you have run out of buffer space in the NetBT datagram buffer.



RESOLUTION
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To resolve this problem, increase the MaxDgramBuffering value from 128 KB to 256 KB:  Start Registry Editor (Regedt32.exe). Locate the following key in the registry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NetBT\Parameters

 On the Edit menu, click Add Value, and then add the following information:

Value Name: MaxDgramBuffering

Data Type: REG_DWORD

Value: 0x40000

 Quit Registry Editor. Restart the Netlogon service (you may have to restart the computer).</li></ol>

NOTE: If you are using Regedit instead of Regedt32 to modify the registry, either
 * right-click Parameters, click New, and then click REG_DWORD -or-


 * click New on the Edit menu, and then click REG_DWORD

and then add the new registry key information.

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MaxDgramBuffering Details
Key: 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:

259883 Upgrading Windows NT 4.0 Domain Controller with FAT File System Does Not Install Active Directory

269119 Logging on to a Domain Does Not Work from a Windows 2000-Based RAS Client

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