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Losing Network Connection

By ihaden ·
We have a network of approx 100 pc's all using TCP/IP. Recently 4 of the machines have started to randomly lose their connection to the network. The problem is that they use software dependent on the network, and when the connection is lost, the program crashes.
We use an NT network using only CAT5 cabling and each machine has a relatively new network card in it.
The only problem that we can see is that the network card and the graphics card are sharing the same IRQ (11) although it is not showing as a conflict. We do not appear to be able to change these settings and have tried re-installing both cards but with no luck.

Any suggestions as to how we can stop these computers losing the connection will be much appretiated.

Cheers

Ian

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Losing Network Connection

by stewart.mcfeat In reply to Losing Network Connection

There are several things you can do to identify where the fault is:

Possible problems:

Faulty CAT5 lead.
Faulty Outlet Module.
Faulty Port on Hub.
Faulty line between patch panel and outlet.

Possible solutions:

1) Change the CAT5 cable from the PC to the outlet.

2) Change the CAT5 cable from the Hub to the Patch Panel.

3) Plug the CAT5 cable from the PC into another outlet.

4) Plug the CAT5 cable from the Patch Panel into another port in the Hub.

5) Re-krone the Outlet module.

6) Move the NIC to another slot on the motherboard.

7) Replace the NIC.

Run a Fluke tester on the line to check for any breaks on the line.

I hope this is useful

Stewart

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Losing Network Connection

by ihaden In reply to Losing Network Connection

The question was auto-closed by TechRepublic

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Losing Network Connection

by brgraves In reply to Losing Network Connection

First answer good but if no luck:
1. NIC should not share IRQ as a rule of thumb. Do the other machines share the NIC as do the trouble machines? Are the video cards standard across the network? Not enough specific info to make a good judgementcall

2. Are the trouble machines on the same subnet as the rest of the machines? could be time out problems

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Losing Network Connection

by ihaden In reply to Losing Network Connection

The question was auto-closed by TechRepublic

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Losing Network Connection

by Hard Hat Harry In reply to Losing Network Connection

The NIC should not be sharing an IRQ to alter the IRQ on the NIC, take it out of the problem PC and put it into a PC with IRQ 11 free. Alter the IRQ in the system settings, to a free one on the original machine, if using Win95/98/NT etc. and then OK. Remove the NIC and put into orignal machine and hey presto the IRQ on the NIC has changed.

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Losing Network Connection

by ihaden In reply to Losing Network Connection

The question was auto-closed by TechRepublic

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Losing Network Connection

by jz001 In reply to Losing Network Connection

You probably tried this already but since no one has suggested it i figure maybe i will. From my experience, which isn't very much,but I found that if you have the wrong NIC drivers installed your network connection will drop in and out. Could give it a try but you probably already have.

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Losing Network Connection

by ihaden In reply to Losing Network Connection

The question was auto-closed by TechRepublic

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Losing Network Connection

by craigm In reply to Losing Network Connection

Above answers are good, however you should check the software your nic came with. Some NIC cards have a utility which requires you to configure the IRQ and I/O address of the card. You may need to do this in order for the card to work. I would also make sure those machines are using sp5. You may also want to visit the site of the PC manufacturer. Compaq and other companies sometimes release updates that address problems like the ones you are having.
Good Luck

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Losing Network Connection

by ihaden In reply to Losing Network Connection

The question was auto-closed by TechRepublic

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