RBR40 losing internet connectivity every 12 hours or so

DOD-March
Tutor
Apr 06, 2020
>> What Firmware version is currently loaded?
2.3.5.34 (upgraded manually from 2.3.5.32)

>> What is the Mfr and model# of the ISP modem/ONT the NG router is connected too?
Arris TG1672G

>> What channels are you using? Auto?
>> Try setting manual channel 1, 6 or 11 on 2.4Ghz and any unused channel on 5Ghz.
2.4GHz : Channel 11
5GHz : Channel 48

>> Any Wifi Neighbors near by? If so, how many?
Not many. This is a replacement for a cheapo router I had before. Little did I know the cheapo was rock solid!

One more thing, there's no seeming issues on the wifi side of the router. It's the connection being dropped from router to modem. I can access the 192.168.1.1 on the router from all devices but can't get to the modem 192.16.0.x during an outage.

thanks, D
- FURRYe38
  Guru - Experienced User
  Apr 06, 2020
  Arris TG1672G is a modem and router.
  If the modem is running in router mode, This would be a double NAT condition which isn't recommended. https://kb.netgear.com/30186/What-is-Double-NAT
  https://kb.netgear.com/30187/How-to-fix-issues-with-Double-NAT
  Couple of options,
  1. Configure the modem for transparent bridge or modem only mode. Then use the Orbi router in router mode. You'll need to contact the ISP for help and information in regards to the modem being bridged correctly.
  2. If you can't bridge the modem, disable ALL wifi radios on the modem, configure the modems DMZ/ExposedHost or IP Pass-Through for the IP address the Orbi router gets from the modem. Then you can use the Orbi router in Router mode.
  3. Or disable all wifi radios on the modem and connect the Orbi router to the modem, configure AP mode on the Orbi router. https://kb.netgear.com/31218/How-do-I-configure-my-Orbi-router-to-act-as-an-access-point and https://www.youtube.com/watch?v=H7LOcJ8GdDo&app=desktop
  https://kb.netgear.com/26765/Disabled-Features-on-the-Router-when-set-to-AP-Mode
  
  I would try option 1. I believe this model modem has a bridge funtion. Make contact with the MFr or ISP to help you with this.
  - DOD-March
    Tutor
    Apr 06, 2020
    First off, appreciate the response here - thanks! Quick questions:
    
    My old wifi router didn't seem to need this bridging?
    Why does the problem only occur once every 12+ hours or so - if it was a fundamental issue wouldn't if flake out more often?
    Does this bridging expose me further to the nastiness of the internet?
    
    >>
    Double NAT is when you connect your router behind another router creating two different private networks. For example, connecting your NETGEAR router behind a modem/router provided by your ISP. Double NAT does not prevent your devices access to the internet but may cause problems with playing online games, opening a specific service port, connecting to a VPN tunnel, or visiting secure sites with SSL. Also, the devices connected to the first private network may not be able to communicate to the devices connected to the other private network.
    >>
    
    thanks again,
    D.
- CrimpOn
  Guru - Experienced User
  Apr 06, 2020
  DOD-March wrote:
  One more thing, there's no seeming issues on the wifi side of the router. It's the connection being dropped from router to modem. I can access the 192.168.1.1 on the router from all devices but can't get to the modem 192.16.0.x during an outage.
  I suspect the "192.16" is a typo, which should read "192.168", correct?
  This indicates that FURRYe38 is correct and you have "two routers".
  The most obvious way to address this issue is to place the Orbi in Access Point (AP) mode, using the Orbi web interface.
  On the Advanced Tab, Advanced Settings, Router/AP mode.
  Before doing anything, can you please humor an "Old Guy" and report the times from the Advanced Tab Home Page, click on "Connection Status" in the Internet Port box.
  What does it show for Lease Obtained and Lease Expires?
  Thanks

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RBR40 losing internet connectivity every 12 hours or so