Microsoft KB Archive/127922

= Setting BDC to be WINS Proxy Agent May Cause Broadcast Storms =

Article ID: 127922

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Server 3.5

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This article was previously published under Q127922



SYMPTOMS
IP broadcast storms can occur when non-WINS clients attempt to log on if Enable WINS Proxy Agent is selected in the Advanced configuration dialog box on a Windows NT version 3.5 Backup Domain Controller (BDC). If multiple backup domain controllers (BDCs) are running WINS proxy agent, then the servers may crash with a STOP message 0xA. The stack trace might look like the following:

kd> kb ChildEBP RetAddr Args to Child fc8b9b74 801088d2 ffbb7828 c038401c e100743e T!_MiWaitForInPageComplete+0xf6 fc8b9bc8 80106f3b 00000000 e100743e c038401c NT!_MiDispatchFault+0x144 fc8b9c18 8013b8ef 00000000 e100743e 00000000 NT!_MmAccessFault+0x221 fc8b9c18 8014fccf 00000000 e100743e 00000000 NT!_KiTrap0E+0xab

CAUSE
The WINS proxy code does not check to see if the datagram it receives is from another WINS proxy agent. This allows the same datagrams to be repeatedly forwarded.

This problem occurs only if the BDC is a WINS proxy agent.

WORKAROUND
To work around this problem, configure another server to be the WINS proxy agent.

STATUS
Microsoft has confirmed this to be a problem in Windows NT version 3.5. This problem has been corrected in the latest U.S. Service Pack for Windows NT version 3.5. 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: 3.50 internet naming service prodnt

Keywords: KB127922

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