Windows – Realtek-NIC with VLAN under Windows always showing UNPLUGGED

cablenetwork-adaptervlanwindowswindows 7

I'm running a Win7-Machine and need to configure my NIC to understand untagged and VLAN-tagged packages. I'm using a Realtek PCIe GBE Family Controller and already installed a common tagged VLAN-adapter with the Realtek-Diagnostics-Tool.
My NIC-Adapter-Overview in Windows shows up 3 NICs:

Realtek PCIe GBE Family Controller
(deactivated) Realtek RTL8139/810x Family Fast Ethernet
Realtek Virtual Miniport Driver for VLAN

The first adapter has IP4 enabled with correct settings and behavios as it should. The second one has all settings unmarked and is itself deactivated. The last one is the virtual one installed by the diag-tool and tagged with the correct VLAN-Number. So sad – it always shows cable unplugged. I can not use this adapter – but of course it has IP4-Settings enabled… Any ideas?

Best Answer

If you have VirtualBox installed try to uncheck VirtualBox Bridged Networking Driver from all connections on that NIC. It is an issue described here.

Related Solutions

Windows-7 Ultimate 64 bit wont connect to the wired/wireless networks

Focus on your wired network first, as there's less software involved in it working. :)

Have you tried "safe mode with networking" yet? If you can connect by wire in safe mode with networking it wll help eliminate it as a hardware problem.

Have you tried using the Windows System Restore to go back to a date before it 'just stopped working'?

Have you ensured your anti-virus package isn't also a firewall that is blocking Internet traffic?

Windows – How to fix network connection dead on startup, but okay after disable/enable

I had this issue on a friends machine. Seems to be a problem with some Windows 7 installs. The only "fix" I could come up with was to create a batch file with the following:

netsh interface set interface "Local Area Connection" disabled
netsh interface set interface "Local Area Connection" enabled

And have it run on Windows startup. (Replace the "Local Area Connection" with the name of the interface you want to disable/enable)

A little hacky, but it worked.

Best Answer

Related Solutions

Windows-7 Ultimate 64 bit wont connect to the wired/wireless networks

Windows – How to fix network connection dead on startup, but okay after disable/enable

Related Question