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jeromefong's avatar
jeromefong
Aspirant
Apr 16, 2023

RBR750 mesh networks slows down after a couple of days.

I have a RBR750 running with 2 satellites connected to my Comcast Infinity modem.  After a reboot, both the Comcast modem and the RBR750 report speeds close to 1 Gbps.  After less than a week, the Comcast modem is still showing speeds of 1 Gbps, but the RBR750 slows down to under 80 Mbps.  I'm running with the latest Firmware version  V4.6.14.3.  The fix appears to be to reboot the RBR750, usually more than once. 

Anyone experiencing similar issues or does anyone know how to fix this slowdown? 

 

Thanks,

 

Jerome

1 Reply

  • plemans's avatar
    plemans
    Guru - Experienced User
    Apr 17, 2023

    What actual xfinity modem is it? 
    Because if it runs its own speed test, i'm betting it isn't just a modem only device but a modem/router combo device. 

    And it causes a double nat. 

    A double nat happens when you cascade more than 1 router.
    https://kb.netgear.com/30186/What-is-Double-NAT
    Fixes? There’s 3 options but only use 1.
    1. Put the modem/gateway in modem only/pass through mode. This disables its routing functions.
    2. Leave the modem/gateway in router mode but put the Netgears IP address into its DMZ. This forwards the data to the netgear. You can either leave the modem/gateway’s wireless enabled or disabled. Just make sure its using a different wifi channel to prevent interference
    3. Put the Netgear into access point mode. This disables its routing functions. Wifi/ethernet still works but it does disable some features.
    https://kb.netgear.com/26765/Which-features-are-disabled-on-my-NETGEAR-router-when-it-is-set-to-AP-Mode