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duffymo's avatar
duffymo
Aspirant
Oct 04, 2020

RBK752 No Internet Connecction

 

Xfinity is my ISP.  The cable modem connecting to the internet is locating in a room above my garage, connecting to my desktop.  I extend wi-fi through the downstairs portion of my house using three of their wi-fi extension pods.  

 

I purchased an Orbi RBK752 in hopes of improving my wi-fi access.

 

i logged into my Xfinity modem as admin, enabled bridge mode, and restarted the modem.

 

I powered up both the Orbi router and satellite, connecting the cable modem to the router using Ethernet port #4.  I set up the Orbi network using the iPhone app.  It said it had no problem getting an Internet connection.  I completed the setup and came downstairs to check the satellite.  It showed a blue light, which means the connection was strong.  

 

I got on my laptop and saw the Orbi network as a choice for wireless connection.  I chose the Orbi network and entered the password.  My phone told me that it could see both my iPhone and my Ubuntu laptop connected to the Orbi wi-fi network.  It looked like I'd done everything correctly.

 

I was disappointed when my laptop could not access any web pages.  No hosts could be resolved; no DNS server was visibile.  It was as if there was no connection to the Internet, in spite of the feedback on my phone.

 

I had to disconnect and turn off the Orbi router and satellite and restore the Xfinity extenders to restore Internet access.  

 

What did I miss?  Why couldn't my laptop find a DNS server when the network said an Internet connection was available?

5 Replies

  • FURRYe38's avatar
    FURRYe38
    Guru
    Oct 05, 2020

    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?

     

    Power OFF the ISP Modem and RBR for 1 minute. Then back ON with the modem first, then the RBR. Be sure to use port #1 on the modem for the RBR ethernet cable. 

  • Mstrbig's avatar
    Mstrbig
    Master
    Oct 05, 2020

    What make/model ISP modem/router is your Orbi router connected to and what is it connected to?

  • Mikey94025's avatar
    Mikey94025
    Hero
    Oct 05, 2020

    First, make sure your Orbi is in Router mode because you are putting your ISP modem into bridge mode.

     

    I use Comcast myself and incur short periods of connection failures when changing to/from bridge mode or changing the hardware requesting a WAN IP (as you did, from your Xfinity gateway to your Orbi).  After making this change, use 1-800-COMCAST automated system to reset and reboot your modem.  You can also go to https://www.xfinity.com/ , Account Settings, Services, Manage Internet.  Under Devices you should see your Xfinity gateway, click the Restart Modem link under it and wait for a bit then restart your Orbi.