I have encountered a major problem that has left 2 of my desktop computers without internet access and LAN connection. The problem came out of nowhere, in the middle of browsing. There is a sudden loss of connection to the router, and a replug will only show a limited connection. (can't find the gateway, can't get DHCP lease) I switched CAT5 cables and the problem stayed. Did a reinstall of ethernet drivers, hard reboot of the router, no effect. Finally, tried a different router to rule out anything else, and the same problem! Limited connection. So I summed it up to be a faulty card and that was that. A few months later today, the same thing happened again to my last desktop. Did a repeat of all the tests and they failed to solve the problem. Even tried spoofing the mac address and that didn't work. Tried to go through a switch before the router and that still failed. Reinstalled operating system and that failed as well. Finally, a different router still only gave me a Limited connection. Took the same CAT5 cable, plugged into a laptop, works without a problem. Wireless has no problems at all.
Can anyone shed some light? I'm at a total loss and I am scared the same will happen to future computers plugged in via ethernet.
12-21-2009 06:38 AM
I'm curious if you tried to hard set the IP address on those wired PC's if you are able to get online.
12-21-2009 07:30 AM
what is it that you are doing to get back online?
are you rebooting or doing a repair? or ipconfig/renew?
It might be the TCP stack, but more pointedly the APIPA itself.
if that is the case, you can try to Disable APIPA and see if that fixes it.