JSI Tip 4825. Broadcast name query timeout may cause logon failures?

If you receive and error indicating that the domain controller could not be contacted, it is possible that a slow response  to the name query broadcast is causing your problems.

Try the following TCP/IP adjustment:

1. Use the Registry Editor to navigate to:

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesNetbtParameters

2. Adjust the BcastQueryTimeout Value Name, a REG_DWORD data type, from the default 750 (0x2ee) milliseconds to a higher value, like 3000 (0xbb8).

3. If you receive your IP address from DHCP, issue an ipconfig /renew. If you use a fixed IP address, shutdown and restart your computer.

NOTE: You can set the BcastQueryTimeout value on a specific adapter:

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesNetbtParametersInterfacesTcpip_ID where ID can be determined from HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlNetwork\{4D36E972-E325-11CE-BFC1-08002BE10318}ID where the ID that you want is the one where the Connection sub-key has a Name value that matches, like Local Area Connection.