Microsoft KB Archive/174231

= DHCP Uses 100% CPU If First Network Card Is Disabled =

Article ID: 174231

Article Last Modified on 10/31/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q174231



SYMPTOMS
On a multihomed computer, you disable the loading of the network card driver (in Control Panel, double-click Devices) or the driver fails to load because of a problem. Following a restart, you observe excessive CPU usage by the Tcpsvcs.exe process.



CAUSE
When DHCP initializes, it attempts to open a socket on each TCP/IP interface. Because the network card driver was disabled, this results in an error. The DHCP service does not correctly handle this case.



WORKAROUND
To work around this problem, perform the following steps:
 * 1) Go to Control Panel and double-click Network.
 * 2) Click the Bindings tab.
 * 3) Select the network adapter that has the disabled driver.
 * 4) Click Disable, and then click OK.



STATUS
Microsoft has confirmed this to be a problem in Windows NT version 4.0. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Additional query words: DHCP binding prodnt

Keywords: kbbug kbnetwork KB174231

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