3 Routers bite the dust in one go? [exact problem] [rig]

admin / October 9th, 2010/ Posted in Networking / No Comments »

V: Well, we had a wireless setup. Worked great. It replaced a regular router that worked great.
My main was wired, the laptop is wireless.

The notebook suddenly stops get on the net. But the network says it is connected and works fine, but I have no IP.
Same thing with desktop.

So for a quick fix, I switch back to my old router . exactly the same problem. (With the exception of w / out the radio)
Says the network fine but no IP.

So I have a router in a match here a while ago . was brand new. I hooked up that one, exactly the same freaking thing.

So what is it? Roadrunner is not suddenly, like routers?

BTW with my PC connected directly to the cable modem, everything works fine.

Any ideas?


Re:Sorry to post twice, but here is what is (most likely) your issue

If you cable company is setup to make you have your MAC address registered, you will still pull an IP of some sort, but not be allowed access to the web until your new MAC address is setup through them.

If you can pull an IP with your computer, but 0.0.0.0 with your router(s), your cable modem is the problem. Most likey you got a surge of some sort either through your the power line, or through the actual cable from your cable company. It can cause the data port on your modem to no longer work the way it should. IE, will not work with a router. (I ran into this issue myself about 2 months ago.)

If you replace your modem you should be good to go (you may have to call your cable company when you get the new modem to register the MODEM with them).


Re:Originally posted by: deathkoba
Could be a virus or hacker

look out!


Re:Sounds like Mguy is right on the money. It is possible that your ISP just implemented MAC Address filtering – They make sure that only your network card can use the service. MAC Cloning allows you to enter in the MAC address of your PC (found by "ipconfig /all" from the command prompt) into your router and it will use that MAC address to talk to the cable modem. Really just a router trick to fool the modem into thinking that it's your PC, even though it's not.

- G


Re:Originally posted by: rhfactor
Are you saying the PC's have no IP or no IP to the ISP?
The ISP has an IP for me….if I plug my desktop straight into the cable modem, it gets an IP and works fine….that's how I'm posting right now.

But all 3 routers will not see the IP from the ISP….they talk to my computers just fine…my local area connection says I'm connected and it's working…but if you try to see what your main IP is, you don't have one. It says 0.0.0.0.0 or whatever…it's all zeroes.

Unplug from the router, plug straight into the cable modem, and BINGO, you have an IP and are on the 'net.

And again, this happened all of a sudden…was working fine through my wireless router before.


Re:Could be a virus or hacker

Re:Are you saying the PC's have no IP or no IP to the ISP?

Re:Thanks for the replies.

What I'd really like to know is why did this happen all of a sudden? I've never had to do any of this stuff before, other than resetting the cable modem. (which I did this time also)

One router that was working perfectly fine suddenly quits and loses its IP, but the network itself seems okay.

Then, two more routers that worked perfectly with this same setup were reconnected and both have the exact same problem.
No IP. Network says it's connected and all is well.

Any chance something has changed with Roadrunner?


Re:Do what Mguy said…

I know MediaCom Online makes you register your MAC address with them, (usually of your computer) and if you add a router or switch NIC cards, your connection wont work until you go to an admin page and update your registered MAC address with them.


Re:power off the cable modem (remove power cable) for a good 5 minutes when switching connected hardware.
some of those things are notoriously picky.

Re:Maybe try and clone the MAC address of your comps nic onto the router.

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