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my ipv6 speeds are slower than ipv4

Regular Visitor

my ipv6 speeds are slower than ipv4

So I recently just setup ipv6 on my router, but the speeds seem to be lacking compared to ipv4. I'll give some details below of my equipment and service.


Modem: Netgear CM1200

Router: Netgear Nighthawk R7000P

ISP: Comcast - Gigabit


When on ipv6, my xfinity speedtest hits around 657 Mbps. But if I turn off ipv6 (within my windows network adapter), my ipv4 speeds hit around 945 Mbps. I will post more information down below.


Speed test I used:

I got 10/10 on this site:


And  here are some screenshots of my results, as well as my ipv6 setup within my router.


ipv6 speed test: 


ipv4 speed test: 


ipv6 connectivity test: 


Router ipv6 settings: 


For my router, I intially had chosen Auto-detect, in which it choose DHCP for me. As you can see, I also changed my DNS to cloudflares


Thanks for any help on this issue.

Regular Visitor

Re: my ipv6 speeds are slower than ipv4

after a few days, ran the same tests and still experiencing the same issues. any help is greatly appreciated, thanks!