I'm at the return to Costco point as well. I've had it for quite awhile but no firmware updates have helped and TP-Link has never responded with assistance since my initial chat with them.

I actually changed that setting a few days ago and had no change in speed. Are you in Router or Access Point mode?

That's really interesting that you were able to get normal speeds. I've never had those settings on though. Tried enabling and disabling them but no change. 455 up 822 down

@MarcusJ1 I never found a solution, I don't want a double Nat so I just live with it but it's annoying. I might just give in and hook the centurylink back up as a passthrough, which is stupid with...

I'm not sure about how on Spectrum but on CenturyLink I plugged the ax11000 directly in to the ONT and then in the settings I had to setup PPPOE and Vlan tagging for CenturyLink's login credentials....

@Jasong1101 Are you using the ax11000 as your modem & router or plugging in to a spectrum modem? I've got the ax11000 going directly to my ONT. I don't have a computer with a network plug and I don't...