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vkr24's avatar
vkr24
Aspirant
Jun 22, 2022
Solved

RBR750 Unable to Connect to Cable Modem

My RBR750 WiFi mesh network with one satellite was working well until last night. This morning the router was not able to connect to the cable modem. I have checked the cable modem and the modem is working fine. Have unplugged the modem and plugged it back in at least three times. But that does not fix the problem. At this time I am have run out of ideas. Requesting help from the community.

 

Thanks,

  • Solved. It reading other messages in the post. To debug the set-up I had a computer connected to my cable modem. ISP provides only one public IP address as mentioned in a previous post. Thus the router was not connecting to cable modem. 

     

    This still does not explain sudden drop of internet connection to cable modem. 

10 Replies

  • The most common advice is to "turn it ALL off and restart."

    i.e.

    • power off satellite, router, and modem.
    • power on modem and wait for lights to stabilize
    • power on router and wait 3 minutes
    • power on satellite

     

    • vkr24's avatar
      vkr24
      Aspirant

      Tried this already. Wondering if a firmware downgrade is needed. 

  • What Firmware version is currently loaded?
    What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too?

     

     

    • vkr24's avatar
      vkr24
      Aspirant

      Don't know firmware number.

       

      Modem is netgear CM2000. Xfinity is service provider. 

       

      Have an alternate TPLink router working (to post to this forum).

      • What Firmware version is currently loaded?

        What LAN cable do you have connected between the modem and RBR? CAT6 is recommended.