Windows Subsystem for Linux for testing Windows 10 PTP Client

Hi Dan. I updata the EnableMulticastRx Key to 1 and restart the time service. When I modify PTPConfig ptpengine:clock_class = 13, win10 PTPClient will not send Delay_Req msg . When I set ptpengine:clock_class below 13, Win10 PTPClient sent Delay_Req msg again. Dose Win10PTPClient will not synic time with clock_class upper than 13?

Another question: I find only I set PTPMaster Mode hybrid or unicast, my win10 PTPClient will work. Dose win10 PTPClient not support PTP Multicast mode ?

When I set PTPMasterMode at multicast, in Wireshark , I only find Announce\Sync\Follow_up\Delay_Req,but no Delay_Resp msg.  I guess win10 set Delay_Req type is unicast ,So PTPMaster will reject to responds. But hybrid mode will accept Delay_Req is unicast ,so it work.