I have two LAN on my Lenovo Branded PC. One is onboard and second is installed in PCI slot. I am using both the card simultaneously. I am using two different ISP settings on both the card. On one card I configured MTNL and on other I configured Airtel. The on which I configured MTNL link is onboard LAN card. Whenever I disable my MTNL link configured LAN card my PC is goes hanged. Then I have to hardboot my PC. Kindly suggest why this problem is coming in my PC. Is there any configuration issue or anything else.
