Microsoft KB Archive/938115

= A Windows XP SP2-based client computer may disconnect from the network when the computer uses 802.1X authentication =

Article ID: 938115

Article Last Modified on 6/27/2007

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APPLIES TO

 Microsoft Windows XP Service Pack 2, when used with:  Microsoft Windows XP Home Edition

 Microsoft Windows XP Professional 

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SYMPTOMS
You are using the following components on a network:
 * A Microsoft Windows Server 2003-based computer that is running the Internet Authentication Service (IAS) service
 * An Enterasys 802.1X switch
 * A Microsoft Windows XP Service Pack 2 (SP2)-based client computer

However, when the client computer uses 802.1X authentication, the computer may disconnect from the network.

When this problem occurs, the following message may be logged in the System log on the client computer: Event Type: Information

Event Source: Tcpip

Event ID: 4202

Description:

The system detected that network adapter Broadcom...Gigabit Ethernet - SecuRemote Miniport was disconnected from the network and its network configuration has been released. If the network adapter was not disconnected, this may indicate that it has malfunctioned. Try updating the driver for the network adapter.

Additionally, the following errors are logged in the Eapol.log file: [3984] 10:59:12:873: Setting state ACQUIRED for port Broadcom NetXtreme Gigabit Ethernet - SecuRemote Miniport [3984] 10:59:13:373: Setting state AUTHENTICATING for port Broadcom NetXtreme Gigabit Ethernet - SecuRemote Miniport [520] 10:59:13:873: Setting state AUTHENTICATING for port Broadcom NetXtreme Gigabit Ethernet - SecuRemote Miniport [520] 10:59:14:389: Setting state AUTHENTICATING for port Broadcom NetXtreme Gigabit Ethernet - SecuRemote Miniport [520] 10:59:14:936: Setting state AUTHENTICATING for port Broadcom NetXtreme Gigabit Ethernet - SecuRemote Miniport [520] 10:59:15:404: Setting state AUTHENTICATING for port Broadcom NetXtreme Gigabit Ethernet - SecuRemote Miniport [520] 10:59:15:904: Setting state AUTHENTICATING for port Broadcom NetXtreme Gigabit Ethernet - SecuRemote Miniport [520] 10:59:16:435: Setting state AUTHENTICATING for port Broadcom NetXtreme Gigabit Ethernet - SecuRemote Miniport [520] 10:59:16:435: Setting state AUTHENTICATED for port Broadcom NetXtreme Gigabit Ethernet - SecuRemote Miniport [520] 11:00:03:054: ElMediaEventsHandler entered -- EventType=<6> [520] 11:00:03:054: ElMediaEventsHandler: Calling ElMediaSenseEventFromWZC [520] 11:00:03:054: ElMediaSenseEventFromWZC: Entered [520] 11:00:03:054: ElMediaSenseEventFromWZCWorker: For interface GUID ({1F57A148-5CEA-4976-B43D-BE361D4DFB43}) [520] 11:00:03:054: ElMediaSenseEventFromWZCWorker: Callback for sense disconnect [520] 11:00:03:054: FSMDisconnected entered for port Broadcom NetXtreme Gigabit Ethernet - SecuRemote Miniport [520] 11:00:03:054: Setting state DISCONNECTED for port Broadcom NetXtreme Gigabit Ethernet - SecuRemote Miniport [520] 11:00:03:054: FSMDisconnected completed for port Broadcom NetXtreme Gigabit Ethernet - SecuRemote Miniport [520] 11:00:03:054: ElMediaSenseEventFromWZCWorker: Port marked disconnected {1F57A148-5CEA-4976-B43D-BE361D4DFB43} Note The Eapol.log file is located in the %windir%\Tracing folder.



CAUSE
This issue occurs because the Network Device Interface Specification (NDIS) network adapter disconnects from the network. This behavior indicates that the Enterasys switch is not working correctly. Therefore, the NDIS network adapter disconnects from the network.



RESOLUTION
To resolve this problem, update the Enterasys switch to run the latest version of the firmware.

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WORKAROUND
To work around this problem, edit the 802.1X settings, and then do not save the changes.

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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

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MORE INFORMATION
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

Keywords: kbexpertiseinter kbtshoot kbprb KB938115

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