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Windows 7: Local Area Connection doesn't have a valid IP configuration

14 Mar 2015   #1
TEH2302

Windows 7
 
 
Local Area Connection doesn't have a valid IP configuration

I have two computers side by side plugged into a Netgear wired switch. One computer works, the other does not. The one that does not work works when I hook it directly to the modem though.

When it is hooked to the switch it says "Local Area Connection doesn't have a valid IP configuration" when I troubleshoot it.

Thank you for any help!


My System SpecsSystem Spec
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14 Mar 2015   #2
AddRAM

Windows 7 Pro x64 Windows 10 Pro x64
 
 

Re boot the modem, reboot the switch. Re boot the problem pc.

There is no reason the second pc shouldn`t work off the switch.

Are you positive it`s a switch ?
My System SpecsSystem Spec
14 Mar 2015   #3
TEH2302

Windows 7
 
 

Yes it's a switch

I have rebooted everything and it still does not work.
My System SpecsSystem Spec
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14 Mar 2015   #4
Ztruker

Windows 10 Pro X64
 
 

Does it work if you connect just that PC to the switch?
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14 Mar 2015   #5
TEH2302

Windows 7
 
 

No it does not.
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14 Mar 2015   #6
AddRAM

Windows 7 Pro x64 Windows 10 Pro x64
 
 

It sounds like the modem is the problem , it`s not a router so it`s not handing out more then 1 ip address.

This rules out the pc being the problem.

Test each pc 1 at a time, are the ip addresses the same ?

Post the exact make and model of the modem, we can then research.

https://askleo.com/why_does_my_home_...ter_at_a_time/
My System SpecsSystem Spec
14 Mar 2015   #7
TEH2302

Windows 7
 
 

I take that back, i tried it again and the computer that doesn't work DOES work on the switch if it's the only one.

Only one can work at a time on the switch.

The one that does not work has an IP address of 169.254.146.179.
From the link above it says "a “169.” is an address that Windows will simply make up in order to have an address – but most things won’t work."

DHCP is enabled.

How do I fix this?
My System SpecsSystem Spec
14 Mar 2015   #8
doctore

Windows 7 Pro
 
 

Post a screen of your router's DHCP settings, would you?
My System SpecsSystem Spec
14 Mar 2015   #9
AddRAM

Windows 7 Pro x64 Windows 10 Pro x64
 
 

doctore, he says he has a modem, he does not say he has a router, there in lies the problem.

Still waiting on the make and model of the modem.

The modem connects to a cable/wire from the outside, bringing in Internet data (email, You Tube videos, Google search results, files) from all over the world. A different wire that goes from your modem to your computer delivers your Internet requests and activity to your computer and monitor. What you see is what you asked for. Thanks, modem!

In case you're wondering, you can't simply plug that cable from your Internet Service Provider directly into your computer. It just doesn't work that way. You NEED that modem between the cable and your computer. No modem, no Internet.

You could go online using just your modem and computer, but there's a reason to think twice. Modems are useful, but they are not smart pieces of hardware. They can't do much when it comes to providing Internet safety, like keeping hackers away. Also, one modem connects to only one computer.

So with just a modem, your computer is at risk. You'll need to rely on special computer software (anti-virus programs, etc.) to fight of bad stuff coming in from online (computer viruses and such). And make no doubt, there's plenty of that out there.

Enter the router, a good companion for your modem, your computer and you. With a few wires and connections and installing some software, you're modem, router and computer get connected.

A router does two special things by leeching on to your modem. (Well, three.)

It can take the digital signal from your modem (which the modem gets from the cable company's cable) and share it with (route it to) other computers in the house. You now have a computer network at home.

In order to do this, the router monkeys with and modifies the IP address on your computer(s). Just by doing that, it automatically makes it hard for hackers to now get at your computer. In fact, it's harder to target any specific computer linked to the router.

A wireless router allows you to connect your Internet connection at home with any wireless device, such as a laptop, Smartphone or iPad. (Make a note: you just need to make sure your wireless network is secure. That information comes with the router.)


To summarize: A modem will only allow 1 computer at a time to go out to the internet.

You need a router installed after the modem and before the switch
My System SpecsSystem Spec
14 Mar 2015   #10
doctore

Windows 7 Pro
 
 

Quote   Quote: Originally Posted by AddRAM View Post
doctore, he says he has a modem, he does not say he has a router, there in lies the problem.

Still waiting on the make and model of the modem.
I hear you, but most modems come with router functions - he said DHCP was enabled - something must be running the dhcp server, and if by "switch" he really means Level-2 switch, then it's not it.

But I see what you are saying, I should rephrase to "DHCP settings of the modem".
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