A simple video guide how to update firmware via ftp.
Text based:
Enter Life cycle control (F10 while booting) -> Firmware Update -> Launch Firmware update -> Select FTP server -> Next -> Address should be ftp.dell.com , everything else blank -> next -> Apply
WARNING: IF DOING FIRMWARE UPDATE TO THE POWER SUPPLIES , THE SERVER WILL GOING TO SHUTDOWN FOR 15-30MIN.
DO NOT TURN ON THE SERVER – SERVER WILL START AUTOMATICLY AFTER FIRMWARE UPDATE COMPLETED