NIC Dual LAN issue URGENT!!!

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Foobucket

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Jan 18, 2011
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I am extremely angry right now. I have a dual LAN gigabyte motherboard and I run windows 7. I am connected to a 24 port unmanaged dlink gigabit switch which connects to my router, but that is irrelevant seeing is this problem persists no matter what I'm connected to. When I connect one of my LAN port, it operates at 10/100/1000 speed for about one second (literally), then disconnects, and reconnects again with the same process repeating itself over and over again until it connects with a 10/100 speed with a stable connection. When I connect both to the same switch, one operates at 10/100 and the other operates at 10/100/1000.

I have tried manually configuring them in device manager and setting them to full duplex at 1.0 Gbps, but of course with my luck that didn't work, and auto configuration doesn't either. I disabled and re-enabled the devices with no avail (of course), and finally I tried reinstalling the device drivers altogether and restarting the computer, and yet again, with my awesome luck the problem continues. I've even tried resetting the switch, etc. I even tried resetting the DHCP, no bueno. I have tried other cat5e cables with no luck.

Please help me!
 

TerryNet

Terry
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Have you installed the latest ethernet driver from the PC or motherboard manufacturer's site?

Have you tried different switch ports?

Have you tried connecting to something other than that switch?

Have you tried 100 Mbps full duplex?
 

Foobucket

Thread Starter
Joined
Jan 18, 2011
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2
yes
no, but i will but that isn't really gonna help
yes
no, what is the purpose of that?
 

TerryNet

Terry
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no, what is the purpose of that?
Gather a little more data. If 100 Mbps full duplex fails I think there is a serious defect in the NICs or motherboard. If it works the same may be true, but the cables still deserve some suspicion. Remember that 100 Mbps uses 4 wires, gigabit uses all 8.
 
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