Supermicro AOC-MIBE6-m1C User Manual page 26

4. Go to BIOS. From the top of the tool bar, select "Boot" to enter the submenu.
Select "Network Drive BBS Priorities" and then select "FlexBoot v#.#.###..."
under Boot Option #1.
5. To boot from PXE automatically, make sure that Boot Option #1 is "Network:
Flex boot" as the image shown below.
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Chapter 3: Installation