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Windows 7: DNS Error

05 Jul 2015   #11

W7 Pro SP1 64bit

Quote   Quote: Originally Posted by pychero View Post is really annoying that on every site I have posted this problem, people only seem to read one or two sentences of what's wrong and assume the answer is one thing that completely ignores everything else.
I do understand. I've asked for help on forums...

I probably should have taken the time to explain why we suggest changing settings in your modem and router. In your first post, you stated that things were working - then they stopped working and that "nothing was altered prior to losing internet." I know that you are saying that you altered nothing; but clearly something has changed and the settings in your networking equipment might need to change too.

My System SpecsSystem Spec
05 Jul 2015   #12

Windows 8 64bit

Modem is a Motorola SB5101
Wireless Router is a Belkin F9K1009v1
Wired Router is a Linksys BEFSR41 v4.1

When I said I have factory reset the router twice I meant once via the reset button on the back, and once via the internal configuration page.

Screenshots of the routers configuration pages attached

Attached Thumbnails
DNS Error-screenshot1.jpg   DNS Error-screenshot2.jpg   DNS Error-screenshot3.jpg   DNS Error-screenshot4.jpg  
My System SpecsSystem Spec
05 Jul 2015   #13

W7 Pro SP1 64bit

Is there any place in the Belkin's interface that tells you what the IP address is coming from the modem? Some info that will answer the question in post #3. If not, try the old Linksys router and look for that IP address.

The cable modem might might not be giving the Belkin or the Linksys an IP address.
My System SpecsSystem Spec

05 Jul 2015   #14

Windows 8 64bit

Linksys and modem screenshots.

Attached Thumbnails
DNS Error-linksys-screenshot.jpg   DNS Error-linksys-screenshot1.jpg   DNS Error-linksys-screenshot2.jpg   DNS Error-modem-screenshot1.jpg   DNS Error-modem-screenshot2.jpg  

DNS Error-modem-screenshot3.jpg  
My System SpecsSystem Spec
05 Jul 2015   #15

W7 Pro SP1 64bit

That seems to indicate that the Linksys is not getting an IP address from the cable modem.

Plug the computer into the proper jack on the Linksys.

Plug the cable modem into the wrong jack on the Linksys.

See if the computer gets an IP address like the one in post #4. If it does, then the circuits that auto-sense jack types have failed on the modem.
My System SpecsSystem Spec
05 Jul 2015   #16

Windows 8 64bit

Connected Computer to correct jack, modem to wrong jack, no change in IP
Debating a factory reset to the modem
My System SpecsSystem Spec
05 Jul 2015   #17

W7 Pro SP1 64bit

You might have to turn off DHCP on the Linksys*. I've actually done this "plug it into the wrong jack" thing more than once when working with cable modems. I've got one setup where that is the way we left it.

If you get an "Internet IP", then the modem is probably bad. If you are leasing the modem from TWC, I would ask them before resetting the modem. Once or twice, I've been told that the default settings needed to be tweaked "for stability". Fortunately, the modems connected and the cable company could tweak it from their end.

*If need be, reset the Linksys to get back into the web based user interface. Or set a static IP on the computer.
My System SpecsSystem Spec
05 Jul 2015   #18

Windows 7 Ultimate x64 SP1

Hmm, I had the same setup until 2 months ago. The same Motorola modem and a Linksys router (same interface, different model).

- Your modem is working alright as you can get the Internet IP on your PC when you connect to the modem directly.
- As you see, both Linksys and Belkin fail to get an Internet IP address on the WAN port. DHCP and other configuration seem correct. And to be honest, no need to look any further when your two routers fail to get an IP.
- The common point between the two is your cable and (maybe) how you connect the modem and router.
Excuse me if the next 2 steps seems dumb, have to make sure as this is crucial.
-- Looking at Google Images, your Linksys router has it's WAN port labeled as "WAN". Use that port, and not "Uplink" or the numbered ones. And it is upside down with respect to the others.
-- Belkin has it's WAN port colored BLUE (labeled WAN), use that one to connect to modem.
- If you are indeed using the correct WAN ports then change the Ethernet cable between modem and router. Do this regardless of if you get IP when connecting PC through this very same cable.
- You may need to restart Belkin after connecting to modem (should be automatic but never know), Linksys you can just click "DHCP renew" on Status page.

I am holding my idea of factory reset as:
1- You already did twice
2- 2 routers failing same time is slim
My System SpecsSystem Spec

 DNS Error

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