I tried to use a MTU larger than 1500 and smaller than 2304 Byte, for example 1600, with two ath10k devices (QCA9888) and was not able to get any ping through. Do these cards support ethernet frames larger than 1500 Byte? Kernel was Linux 5.7, firmware ver 10.4-3.9.0.2-00086. Regards, Markus