IPV6 Enabled Causing BufferBloat and Lower Speeds

[nickskep]

Hello, 

I have a Netduma R2 and when I enable IPV6 I get bufferbloat and lower speeds. My speed is normally 300/300 and when I enable IPV6 i get around 100/100. i also notice web browsing is slower when using IPV6. Any known issues around this and or preferred settings that can be provided to run IPV6 optimally?

Thanks.

[Netduma Fraser]

What is the model of the modem/router the R3 is connected to and how have you set that to ensure all traffic flows to the R3? E.g. R3 in its DMZ, modem/bridge mode

Where are you testing the speeds exactly? Do you have the Adblocker enabled on the R2?

[nickskep]

Hi Fraser. My R2 is connected directly to ISP (Verizon Fios), with no modem in between, so no DMZ. I am testing on Bufferbloat.com. No Adblocker enabled. 

[Netduma Fraser]

Does the speed test on the router itself show higher? Can you provide a screenshot of the Device Manager table view please?

[nickskep]

Yes, the speed on the Device Manager does show similar with IPV4 or IPV6 enabled. 

[Netduma Fraser]

So it says 1000Mbps link speed in both scenarios?

[nickskep]

Sorry Fraser i didn't respond earlier, just got home from work. Here is the screenshot if it helps. This is with IPV6 enabled.