Odd networking problem

[nshenry03]

I had a desktop that originally had a wireless usb in it set up. It was slow so I ran a cat 5 cable to it, I couldn't get it to connect so after about 10mins I gave up and was going to live with it.

We recently had another computer free up and we were just going to get rid of the computer w/ the networking issues, so I plug in the new computer, no go, it will not connect, same error as before (Will not pull an IP).

So just to be sure it was the cat 5 I plugged in a co-workers laptop, it connected no problem (I disabled wireless). So I tried hooking up the two desktops in my office and both worked well. So I tried another Laptop on that wire, it worked fine. tried the desktops again and they wouldn't work.

I've tried switching out power cables, rerunning the cat 5, setting static ips, changing monitors (old crt maybe giving off something?), only plugging in needed stuff (no speakers, etc.).

Any suggestions?

 

[gdvissch]

to me it looks like a speed/duplex error...
Is it set to "auto" or is it something like 100 full duplex?

Best would be to have both switch and PC in auto. As soon as one of the two is fixed to something, the other should be fixed too.

The setting can be found by right clicking on your network interface card, then select properties. In the properties window click on advanced and look for speed & duplex or something similar...
G.

 

[allteltec]

Check to see if you have a cross over cat 5 cable some were in the run, Most new computers are auto config. and will work. I ran into this at work with a older laptop would not connect and newer dell's would.

 

[nshenry03]

Thanks for the help, but I'm still not able to get it going. The crossover cable may be the problem though (I may need one in the run).

Here is the setup (all are currently normal Ethernet cables):
Switch to Patch Panel
Patch Panel to coupler
Coupler to computer

 

[gdvissch]

Did you verify speed/duplex? If the link LED on either switch or PC is lit it will not be a cross cable issue...

G.

 

[nshenry03]

yes, pc is set to auto rather than full duplex. The link led is lit

 

[gdvissch]

And what is the switch set to? both have to be set the same...
Just try fixing it to 100 full to see if this changes something ...
G.

 

[allteltec]

I was called in to help a tech. on a problem like yours desktop CPU could ping but in IE page can not be displayed. laptop connected to same cable worked ok. I had removed drivers and reinstalled run winsockfix still no go. Last resort I put my cat5 tester on the new cat5 cable and found one of the Xmit wires was open in the middle of the cable, Ran a new cat5 cable and all was ok. So if you have not put a cat5 tester on the cable you should.

 

[Bigdaddynavarre]

Dude, carry the computer to a known working wire.

If it works, then the problem is wit' the wire.

If it doesn't work, put in a $15 nic.

Else run new verified cable.

 

[nshenry03]

reran wire, making sure to keep it at least 16" away from any power cables (It does have to cross power cables twice perpendicularly). Wire Tester show it is a good cable. Tried two different desktops, neither worked at that drop, but both worked on other outlets w/o problems. Laptop works fine again at the drop that I'm having problems with. Could something be causing interference? I guess worst case I can just go back to the wireless usb we have for it.

 

[gbaughma]

I know this sounds silly... but I've actually SEEN it with my own eyes.

try plugging the computer into a different outlet on a different circuit. Even if you have to run an extension cord to test it.



Just my 2¢
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Who wanted to write a Haiku
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