[SOLVED] With direct modem connection: Local area connection doesn't have a valid ip configuration error

MattyKo

Honorable
Jan 30, 2015
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10,520
Hello,

I am receiving the "local area connection doesn't have a valid ip configuration" when I directly connect my PC to my modem via Ethernet cord. But if I connect the modem to my router then then connect that to my PC, I have a connection. I have two PC's connected to my router and when I try to directly connect them each to my modem I get the error for both. I have tried to manually input an IP whilst directly connected to the modem with no results. I've ran a slew of ip command in the cmd prompt (ipconfig /release etc etc) that I neither understand nor even have the slightest idea of what they do, but was listed in another help forum.

Now why I want to connect to my modem directly: I have been suffering insufferable speeds from my ISP and was wondering if it was due to my router, which I've power cycled several times and same with my modem. I also have quite a bit of things connected to my router via smart home things, so I was wondering if my speeds were due to that. I just ran into this issue for the first time and it is bugging me so I'd like to know why I am having this error.

I'm running Windows 10 on both PC's...just using the network port on the mobo. I have a ARRIS modem and a Linksy router.

Any insight would be helpful, thanks
 
Solution
Modems lock the first mac address they see. Many times you must reboot the modem every time you plug something different into it. You might be able to use options to change the mac address on your pc but reboot tends to be easier.