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TWC Motorola SBG6580 and Airport Extreme

So Time Warner came out and installed a Motorola SBG6580 in my home (Docsis 3.0) to allow me to receive their Wideband Internet offering (50 down / 5 up) but i'm having huge problem with how it fits into my network.

I have an Airport Extreme and 2 Airport Expresses. Now the main problem is the Motorola Cable Modem is both a modem and a router. I want it to just act as a modem.

I called TWC and they told me to disable NAPT mode, which puts it into a state where it just acts as a modem. Great, that sounds good.

I went ahead and did that but when I rebooted the whole network it only allowed 1 computer to connect. None of my iPads or iPhones or Xbox could access the network anymore. (My Airport is on Firmware 7.6).

Why is only 1 computer able to access the new network? What am I missing?

Posted on Dec 11, 2011 6:41 AM

17 replies

Feb 23, 2013 2:29 AM in response to Arzenal

Need to revive this old thread - I'm in the same predicament - SBG6850, newish AirPort Extreme - and severely disappointed with the wireless capabilities (or lack thereof) on the modem. The link helps but really doesn't give step-by-step instructions. Do I just plug a cable from the modem into the Internet connection port on the AE? Do I have to do anything with using the modem as a bridge. I'm just not network savvy and while I love the 73Mbps that I'm getting, I want my 'old' wireless back!

Any detailed help would be appreciated.

Clinton

Feb 23, 2013 7:34 AM in response to clintonfrombirmingham

clintonfrombirmingham wrote:

Do I just plug a cable from the modem into the Internet connection port on the AE?

Yes.

Do I have to do anything with using the modem as a bridge.

I'm not sure what you mean by that, but you have to configure the modem to operate in bridge mode to avoid a "double NAT" condition.

TWC Motorola SBG6580 and Airport Extreme