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Linksys Router

Posted on 2016-08-30
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Last Modified: 2016-10-02
I have successfully been using a Linksys E1200 router for several years. A friend recently offered me a used Linksys E4200 router as an upgrade. It worked fine for my friend as of a week or two ago.

I can't get the E4200 router working. I can ping the router and access the settings from my computer, but I can't get an IP address or ping anything past the router. I've done a hard reset, which takes me back to the setup page for the router settings. However, I also noticed that in Network and Sharing Center it shows the old network name (the name my friend had created) even after 10 hard resets.

I've switched back to my old router which works fine, so I know the issue is with the new E4200 router. I'm using the exact same Ethernet cables for both routers, just switching from one to the other.

I don't think the MAC address is an issue, but I've set both the old one and new one to clone my PC's MAC, and the old one works while the new one doesn't.

I updated the firmware of the new router, but it didn't work before or after updating.

I've run out of ideas, so I'd appreciate any help. Thanks!
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Question by:Alex Smith
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by:John Hurst
ID: 41776325
On your workstation, do a TCP/IP reset. DNS Flush.

Open cmd.exe with Run as Administrator
Then  netsh int ip reset c:\resetlog.txt
Also, ipconfig /flushdns followed by net stop dnscache followed by net start dnscache

Turn the computer OFF.
Turn the router OFF.
Turn off your cable modem / ADSL modem

Now turn on the modem and wait one minute.
Now turn on the router and wait one minute.
Now turn on the computer and test.

What happens?
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by:FOX
ID: 41776344
Did you do a hard reset by pressing the button on the back of the router for at least 10 seconds so that everything can go back to factory settings or did you do a reset from the web page?
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Author Comment

by:Alex Smith
ID: 41776365
Thanks so much for the quick replies.

John, I tried following the steps you outlined but didn't notice any change. Then I unplugged the cables from the new router and put them back in the old router, and it worked fine. So I'm still not sure what's going on.

Foxluv, I started with the hard reset because I didn't know my friend's admin password. Then, once I was able to get into the settings with the default password I tried a reset from the settings page. Neither seemed to work. However, as I noted above, weirdly the old network name still shows up in Network and Sharing Center (but not the router settings) so it seems like maybe not everything is being reset fully.
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by:FOX
ID: 41776370
I want you to unplug the router.
Hold the reset button then plug it in while holding in the reset button.  Keep holding it in for at least 10 seconds after you have plugged it back in.  With the hard reset, the old network name should not be showing up at all.
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by:John Hurst
ID: 41776373
Based on your description, the new router may have failed.

A full reset will reset the password to default (often admin and blank password).

Try a full reset one more time.
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by:FOX
ID: 41776376
When I say unplug, I mean from the electrical power.
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by:Alex Smith
ID: 41776379
I tried a full reset several (10+) times. It does reset all the settings, including the router password to the default password. However, I don't know why the old network name shows up in Network and Sharing Center, especially when it's not in the router settings.

It's definitely a possibility that the router has failed, it just seems odd since it was working fine a week or two ago in a different location.

Thanks again!
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by:John Hurst
ID: 41776380
I would say now the router is defective
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by:Alex Smith
ID: 41776392
I just tried one more hard reset, starting with it unplugged as Foxluv suggested. It definitely worked, as going to the settings page now takes me to a Cisco welcome screen (as it did the previous times). However the old name still shows up in Network and Sharing Center, and I still can't get online.
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by:John Hurst
ID: 41776395
So then try another TCP/IP Reset, DNS Flush on the workstation to clear it out. The router still could have a hardware issue.
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Author Comment

by:Alex Smith
ID: 41776417
I tried that one more time, and still nothing. It's possible that it's a hardware issue, I'd just be surprised since it worked so recently.

If anyone has any other ideas I'd appreciate it.
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by:John Hurst
ID: 41776425
Any decent computer with a fresh TCP/IP stack, and any decent router reset properly, and a good modem also reset will give you internet. I have done this more times than I can count.

You know the old router works which confirms what I say .

So unless you are tied to this new router, just replace it.
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by:FOX
ID: 41776435
on an elevated command prompt for the workstation in question run this command
netsh winsock reset
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Author Comment

by:Alex Smith
ID: 41776508
Unfortunately that didn't seem to change anything either, even after a restart
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by:John Hurst
John Hurst earned 250 total points (awarded by participants)
ID: 41776512
I had suggested elevated command way back, so no surprise that nothing changed.

Unless you have some view to the contrary, the router looks like toast.
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IT-Expert earned 250 total points (awarded by participants)
ID: 41776650
I can ping the router and access the settings from my computer, but I can't get an IP address or ping anything past the router.

You mention network cables?  All PCs are using network cables yes?
You say that you can't get an IP address from the router, so I'm guessing that you must of set up a static IP on your PC, to be able to access the router settings?
I know this is stupidly obvious and doubtful, but is DHCP turned OFF on the router by any chance?
What does doing an "ipconfig/all" on your PC give you?
You can't ping anything past the router?  Does that include the default gateway?

It does seem odd that the router was ok a week ago, and now doesn't  work (but hey, these things can happen!)
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Author Comment

by:Alex Smith
ID: 41777077
Well I was able to figure out one minor thing: the reason the old network name was appearing was from an old registry key, which must have been from when I used this computer when it was my friend's router. Deleting that key (HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkList\Profiles) made it so that a hard reset really did erase everything, but it didn't fix the underlying issue.

And yes, everything is configured for DHCP. Since I've repeatedly reset it it's set to the default for everything.
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by:John Hurst
John Hurst earned 250 total points (awarded by participants)
ID: 41797087
It appears this router is defective as noted and we should close the question that way.
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