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No incoming data on LAN connection

Posted on 2010-09-21
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Last Modified: 2012-05-10
I have a PC that's connected to our LAN, and about an hour ago, it went down. If I go into Network Connections, click on Local Area Connection, and choose Status, what I see is packets being sent but no packets being received. The connection has an IP address. I've tried the obvious things, clicking Repair to fix the connection (Windows says that the repair was successful), restarting the computer, unplugging the router, but none of that worked. Unfortunately. this computer is the one in the office that holds all of our files, so we really need to get it back up and running, but I don't know what to do. Does anybody have some suggestions? Thanks.
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Question by:tjgquicken
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by:Chris Staunton
ID: 33727403
Since this is a "File Server" then I'm guessing the IP address is a static address so you would have one if the connection worked or not.  You can try to run some command line utilities to see if the card is working such as ping and tracert.

From the command line:

ping x.x.x.x (ip address of your router)

tracert x.x.x.x (ip address of your router)

Either of those two utilities will attempt to make contact with your router.  If you get destination host unreachable then you've probably got a dead NIC on your hands.  Hopefully you have a spare NIC you can throw into that machine.

Shooter
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by:tjgquicken
ID: 33727470
No, the IP address is not necessarily static, it's assigned by DHCP. But tracert and ping both had requests time out, so I guess that's not a good sign.
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by:EnriquePhoenix
ID: 33727490
Verify your IP settings are correct
Ensure your firewall is not blocking file-sharing

Do as Lilshooter mention:
ping this machine from another computer
ping another known computer from this computer

These will only tell you if you have connectivity.

In Control Panel > System > Device manger does you network card have a yellow !
Are there any light lit on the NIC. Yellow and Green?
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by:EnriquePhoenix
ID: 33727499
If this machine is not static are you using a DNS server to find it?
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by:Chris Staunton
ID: 33727519
Also try to release and renew your ip address, from the command line.

ipconfig /release
ipconfig /renew
if this renews your ip address then you do have network connectivity

You might also want to try a different switchport on your router/switch and see if that helps.


Shooter
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by:tjgquicken
ID: 33727581
ping and tracert both time out. In the Device Manager, there's no yellow ! by the network adapter. Under Properties -> Device Status, it says "This device is working properly." To the best of my understand, the DNS server is built into the router. When I first wrote this, the computer that's not working was listed in my router's DHCP Client Table, but now it isn't.
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by:Chris Staunton
ID: 33727616
So it's lost its network connectivity, I'm guessing either bad cable, bad switchport or bad NIC.  Have a spare NIC that you can throw in and test?

Shooter
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by:tjgquicken
ID: 33727780
I don't have a spare NIC, or the technical skills to replace the one in my machine. I tried a different cord, and the result was that according to Local Area Connection Status, my machine's IP address is 192.168.1.106. (This took longer than usual.) But a little bubble came up in the taskbar that said I had limited or no connectivity because my machine wasn't assigned an IP address. Then, in Local Area Connection Status, I clicked Repair, and it said it couldn't repair the connection because it couldn't get an IP address. Nevertheless, it still says that my IP address is 192.168.1.106. Do you think there might be something wrong with the router, rather than the NIC?
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by:Chris Staunton
ID: 33727826
Doubtfully, all signs are pointing to the NIC at this point.

Shooter
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by:tjgquicken
ID: 33728265
I removed the ethernet wire from the hub and plugged it directly into the router, and that seemed to fix the problem. Not sure what's going on, since the other computers plugged into the hub are all working normally, but I'm glad the problem is solved. Thank you all for your help.
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