On the adapter, the MAC address on the label is for the first port. The second port's MAC address is the MAC address from the label, plus 1.
The server should reboot after saving the boot configuration.
If the cable is connected to the correct port, you should see the MAC address that you assigned to your PXE server displayed by BIOS. If your platform does not support the F12 key, you might need to boot from the BIOS.
The host will perform a PXE boot from the Oracle Dual Port (25 Gb or 100 Gb) Ethernet adapter port, DHCP, and the UEFI PXE boot server response. This screen appears.
Unless you change the boot device priority, the OS installation process repeats.