We have an X480-48X switch , we have changed the hardware by RMA and upgraded the code to the advised level ( previous 18.104.22.168-patch1-11 ), we have had a TAC case open, even with this we are still seeing ramdom reboots.
Full version :
xpctRebootDtect> Booting after System Failure.03/15/2017 15:41:41.84
This unit is configured as a Supervlan , and is internet facing.
Prior to this I did see in the log a number of outside attempts to access the switch management , this was stopped by our Access-policy.