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coolwifi's avatar
coolwifi
Luminary
Jan 02, 2026

RS500 router - Internet feels much faster with IPV6 disabled?

Any insights why my internet and general browsing feels much faster with IPv6 disabled in the router. My ISP is Xfinity and it provides native Ipv6 support with DHCPv6-PD. The same has been my observation with my previous router R6700AX.

 

Also the internet speeds see a few Mbps increase with IPv4 only, although this is subjective. Definitely enabling IPV6 takes a toll on the router. It might be an ISP routing issue too.

6 Replies

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User

    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? 
    Be sure your using a good quality LAN cable between the modem and router. CAT6A STP is recommended. 

     

    Using ISP detected IPv6 DNS or custom DNS? 

    Is Protection Engine enabled on the RS router?

    • coolwifi's avatar
      coolwifi
      Luminary

      What Firmware version is currently loaded? Latest version 1.0.5.22
      What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too? Hitron Coda 56 modem
      Be sure your using a good quality LAN cable between the modem and router. CAT6A STP is recommended. - Using Cat6a STP cable

       

      Using ISP detected IPv6 DNS or custom DNS? ISP DNS

      Is Protection Engine enabled on the RS router? No

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User

    Tried custom IPv6 DNS to see if there is a difference? 

    Also there is beta FW available I believe for the RS500...

    • coolwifi's avatar
      coolwifi
      Luminary

      Tried with custom ipv6 DNS, there's no difference. Will try the beta FW, but not sure if that will help with the dual stack ipv4 and ipv6 performance.