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by jbowser1

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I have a Dell 8100 with a built in 3Com NIC and a Kingston NIC in a pci slot. The 3com is set for DHCP from the cable modem and the Kingston is set as a lan card 192.168.0.1 If I fire up the PC with both card enabled the 3Com will not connect to theinternet untill I disable the LAN card. After making connection the LAN card usally works OK. Any ideas??

10 replies

by dmiles

There is a possibility that you may have a IRQ conflict,that is causing the NIC in PCI slot to not connect,check the system to see if there is a conflict

by dmiles

There is a possibility that you may have a IRQ conflict,that is causing the NIC in PCI slot to not connect,check the system to see if there is a conflict
With the onboard NIC enabled it will override the PCI installed NIC,which you will not be ableto use,until you configure accordingly

by jbowser1

They are sharing the same irq but neither show any conflicts and both have the settings greyed out so I couldn't change them anyway. This is a fresh install from a low level format. I tried the new install to see if this would solve it. If I delete the card it will install again with #2, #3, etc after the card name. I've tried different cards and different pci slots but have the same results.

by pokhylchenko

Make sure that 3com card isn't getting IP address from the same range as Lan card (192.168.0.0). Some ISP's practice that :(

by dnr1795

Why not set both cards to DHCP? Don't have cable modem so not sure on all the details, but maybe giving it a non-routable IP address is why it won't connect out, but recieves after the other one connects. ??? Don't know if UR cable company would give you 2 address'.

by jbowser1

To set both to DHCP wouldn't work unless I set one machine as a DHCP server. The 3com is set for DHCP from the ISP and the other is static. All the cable company gives is a single address. The same setup worked on Windows ME. It even worked on RedHat when I had the system setup to triple boot. The problem started after upgrading to win2000.

by sherart2002

Make sure you do not enter a default gateway on the Kingston NIC. If you have to enter one, change the route to 0.0.0.0 manually to get around this. For instructions, just ask. I am assuming you have the 3Com plugged directly into the cable modem, and the Kingston into a hub/switch for a home network.

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