Unable to Enable the Port Extension Function on the SVN3000

Publication Date:  2012-07-20 Views:  128 Downloads:  0
Issue Description
A user attempted to enable the port extension function of the SVN3000 on the Web management interface. However, after the user clicked the Enable button, the client is disconnected from the SVN3000 after transient connection.
Alarm Information
None
Handling Process
Solution to cause 1
1.      Right-click My Computer, choose Properties > Hardware, and click Device Manager.
2.      In the Device Manager window, choose View > Show hidden devices.
3.      Unfold Network adapters. If SVN3000 Adapter V1.0 exists, uninstall it.
4.      Enable network extension again. The new virtual network adapter will be installed in the process.
Solution to cause 2
1.      Choose Start > Run on the PC. Enter cmd to display the CLI window. Run the sc query nemservice command to check the status of the nemservice. If the status of the nemservice is Running, stop the nemservice by choosing Start > Control Panel > Administrative Tools > Services, right-clicking Nemservice, and select Stop.
2.      Choose Start > Run on the PC. Enter cmd to display the CLI window.
3.      Run the sc delete nemservice command to uninstall the nemservice.
Enable network extension again. The nemservice will be installed in the process.
Root Cause
The possible cause is that the IP address is incorrectly mapped to the virtual network adapter. In this case, you need to set the virtual network adapter.
Cause 1: The virtual network adapter failed to be installed when the user enabled network extension.
Cause 2: The nemservice failed to be installed or started when the user enabled network extension.
1.      Choose Start > Run on the PC. Enter cmd to display the CLI window. Run the sc query nemservice command to check the status of the nemservice. If the status of the nemservice is Running, stop the nemservice by choosing Start > Control Panel > Administrative Tools > Services, right-clicking Nemservice, and select Stop.
2.      Choose Start > Run on the PC. Enter cmd to display the CLI window.
3.      Run the sc delete nemservice command to uninstall the nemservice.
4.   Enable network extension again. The nemservice will be installed in the process.
Suggestions
The hardware and software of the PC determines whether the network extension function can be enabled or not on the client. The nemservice and virtual network adapter are automatically installed when network extension is enabled. If the nemservice and virtual network adapter are incorrectly installed, the network extension function is unavailable.

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