the customer get a problem that he can't format the ISCSI LUN at the windows server 2012 host. from the logs analysis it because the customer setting the MTU to 9000. but the os side not set the same value.
need modify the 9000 to 1500 it will be ok.
if they want to use MTU 9000 Jumbo frame, they need enable both on Ethernet Switch and host Ethernet card.
