I have a T3200M dual band router. I'm running Windows 10 and I'm using a USB Wireless Adapter with a Realtek 8812BU chipset. I've tried different drivers for the USB adapter but they all have the same symptoms. If I connect on the 2.4Ghz band I have no problems with IPv6 connectivity.
However if I connect on the 5Ghz band and go to an IPv6 testing website (such as IPv6-test.com) the test results say I either do not have IPv6 capability or that it is not enabled.
I'm guessing there is some sort of setting on the router that should be changed, but I have no idea what to look for. A phone call to Telus Support was not too helpful. He said it should work but was unable to walk me thru what to look for in the router settings. Anybody got any ideas?