Microsoft KB Archive/927750

= A disconnected network adapter appears connected when you run the IPCONFIG command on a Windows Server 2003-based computer that has iSCSI Boot Initiator 2.03 installed =

Article ID: 927750

Article Last Modified on 10/11/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition
 * Microsoft Windows Server 2003, Standard x64 Edition
 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, Datacenter x64 Edition
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
 * Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems
 * Microsoft Windows Server 2003 R2 Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003 R2 Enterprise Edition (32-Bit x86)
 * Microsoft Windows Server 2003 R2 Datacenter Edition (32-Bit x86)
 * Microsoft Windows Server 2003 R2 Standard x64 Edition
 * Microsoft Windows Server 2003 R2 Enterprise x64 Edition
 * Microsoft Windows Server 2003 R2 Datacenter x64 Edition
 * Microsoft Windows XP Professional x64 Edition

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SYMPTOMS
When you run the ipconfig command on a Microsoft Windows Server 2003-based computer that has Microsoft iSCSI Boot Initiator 2.03 installed, a disconnected network adapter appears connected.

Note This problem occurs only if you click to select the Configure iSCSI Network Boot Support check box when you install iSCSI Boot Initiator 2.03.



CAUSE
This problem occurs because installing iSCSI Boot Initiator 2.03 disables the Media Sensing feature. When a DHCP client disconnects from a network and then connects to a different network, iSCSI Boot Initiator 2.03 lets the client detect new network settings without restarting, releasing, and then renewing the IP information. Media Sensing lets a network adapter detect a network cable connection failure. When a network cable connection failure occurs, Media Sensing removes the bound protocols from the network adapter until the connection is reestablished. However, when Media Sensing is disabled, the network adapter remains bound to the TCP/IP stacks. Therefore, the ipconfig command reports that the network adapter is connected.



WORKAROUND
To work around this problem, view the status of the network adapter in Network Connections. To do this, click Start, click Connect To, and then click Show all connections.



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



MORE INFORMATION
For more information about the Media Sensing feature, click the following article number to view the article in the Microsoft Knowledge Base:

239924 How to disable the Media Sensing feature for TCP/IP in Windows

Keywords: kbtshoot kbprb kbexpertiseadvanced KB927750

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