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xraphael75's avatar
xraphael75
Aspirant
Mar 29, 2023

R6900P Nighthawk constant wifi disconnects

I have an R6900P Nighthawk router with firmware version V1.3.3.154_10.1.86 and my devices constantly disconnect throughout the day when connected to the 5G wifi network. The 2.4 GHz network doesn't ...
Kitsap's avatar
Kitsap
Master
Mar 29, 2023
xraphael75 wrote:

I have an R6900P Nighthawk router with firmware version V1.3.3.154_10.1.86 and my devices constantly disconnect

throughout the day when connected to the 5G wifi network. The 2.4 GHz network doesn't appear to have an issue. I found this thread where someone else had the exact same issue, and he never received an answer:

 

https://community.netgear.com/t5/Nighthawk-Wi-Fi-5-AC-Routers/R6900P-random-disconnect/td-p/2160995

 

I tried the few things that were suggested to him with the same results. My 5G wireless settings:

 

channel: 48

Mode: up to 1300 Mbps

Fragmentation Length: 2346

CTS/RTS Threshold: 2347

preamble mode: Long Preamble

implicit beamforming, airtime fairness, and mu-mimo are all checked.

 

I have a wifi analyzer on my phone, and it indicates a very strong signal. It's usually at -40 dBm, which is better than pretty much any other wifi network I try to connect to, so it's not the signal strength that's causing the disconnects.

 

Has anyone found a fix for this?

 

What is the brand name and model number of the modem/gateway/ONT that is connected upstream of your router?

 

Make sure you have good quality Ethernet cables between your devices.  Cat 6 is recommended.

 

Based on the Wi-Fi analyzer on your phone, do you have Wi-Fi neighbors or live in an environment with lots of radio frequency signals?

 

 

  • xraphael75's avatar
    xraphael75
    Aspirant
    Apr 13, 2023

    What is the brand name and model number of the modem/gateway/ONT that is connected upstream of your router?

    SMART/RG SR400ac

     

    Make sure you have good quality Ethernet cables between your devices. Cat 6 is recommended.

    They are either cat5 or 6

     

    Based on the Wi-Fi analyzer on your phone, do you have Wi-Fi neighbors or live in an environment with lots of radio frequency signals?

    On the 5G network I see 10 other networks. My R6900P is the only one on channel 48, and the only one on 5240MHz Frequency, so it seems that nothing else should be interfering with it.

     

    • Kitsap's avatar
      Kitsap
      Master
      Apr 13, 2023
      xraphael75 wrote:

      What is the brand name and model number of the modem/gateway/ONT that is connected upstream of your router?

      SMART/RG SR400ac

       

      Make sure you have good quality Ethernet cables between your devices. Cat 6 is recommended.

      They are either cat5 or 6

       

      Based on the Wi-Fi analyzer on your phone, do you have Wi-Fi neighbors or live in an environment with lots of radio frequency signals?

      On the 5G network I see 10 other networks. My R6900P is the only one on channel 48, and the only one on 5240MHz Frequency, so it seems that nothing else should be interfering with it.

       

      Basically a repeat question, what is the brand name and model number of the modem/gateway/ONT that is connected upstream that provides your internet connection?  The SMART/RG SR400ac is not a modem/gateway/ONT.  What is between the SMART/RG SR400ac and the internet?  Any more devices that also are a router?

       

      The SMART/RG SR400ac is a Wi-Fi router similar to your R6900P.  Your configuration has them cascaded in series so they are in conflict with each other full time.  The condition is known as double NAT and it is the first thing your need to resolve.

       

      For background check here:  https://kb.netgear.com/30186/What-is-double-NAT-and-why-is-it-bad

       

      You can usually get by with Cat 5e Ethernet cables.  Your Cat 5 Ethernet cables should be replaced with Cat 6.