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timbo8391's avatar
timbo8391
Aspirant
Jul 19, 2020

AX12 Won't connect to Comcast Modem

I've got a Comcast Arris cable modem and configured it for bridge mode. I connect it to my AX12 router and I get an internet light on the router so everything looks good. However, I can't connect to the internet. I've rebooted both modem and router several times with no change. If I use the Comcast router everything works but I'd rather use my AX12. The AX12 also is working since I have used it with another modem. Does anyone know what might be going on?

15 Replies

    • RajaDaja's avatar
      RajaDaja
      Luminary

      Whoops! Sorry I see you mentioned  using it already.   

    • timbo8391's avatar
      timbo8391
      Aspirant
      Yes the modem is provisioned and the built in router works. When I switch to bridge mode and connect to my AX12 I get an internet light but can’t connect to the internet.
      • RajaDaja's avatar
        RajaDaja
        Luminary

        After you've made your connection, did you power cycle everything?

         

        Starting with the bridged device:     1. unplug from power source the turn off

                                                               2. unplug your Netgear Router

                                                               3. Turn off Computer

         

         

        Turn on your Network:                    1. Plug in bridged device(modem) let it come fully online.

                                                               2. Plug in your router, turn it on

  • I have the same setup, XB6 modem and AX12.  I was not able to get bridge mode working either.  The router never got a dynamic IP assignment. Comcast support even tried helping out.  They were very helpful but after failing to get it to work, Comcast gave me an account credit.

     

    However, I'm getting much better overall WiFi out of the Comcast XB6 than I am with the AX12. So I'm debating a return. I have both APs running now.  Which I need for my 802.11ac clients to even get a stable connection.

     

    We shouldn't have to stuggle so hard getting a $500 router to work!  It should be amazing out of the box. 

     

    • avtella's avatar
      avtella
      Prodigy

      This sounds more like an issue with the Comcast XB6 firmware, not so much an RAX120 issue.... 

    • RajaDaja's avatar
      RajaDaja
      Luminary
      Sorry to here that. Have you actually used the AX12? To imply that the Xfinity gateways wi-fi is better without actually setting up your AX12 is a little bias. Well you could save over a hundred dollars a year by purchasing your own modem......
    • timbo8391's avatar
      timbo8391
      Aspirant

      I think this is the problem I am having. I get everything connected up, get an internet light on the router but I don't think I get an IP. I have no idea why this is happening. I had the AX12 working just fine with a different modem. Maybe I need to switch back to my old modem and get rid of the Comcast one. I'm not even able to see the router when I try to browse to it. Comcast sees nothing wrong when they check.

       

       

      • michail71's avatar
        michail71
        Apprentice

        The problem could be on either end but it's hard to tell.  I suspect Comcast firmware is the issue. We would need an engineer from either side to debug.  All I can tell is that the asignments are not being negotiated between them.