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Important information
The following is important information you need to know when working with your switch:
Secure boot
For the secure boot feature, the .bin file is replaced with the .tar file. The .tar archive file has both the .bin file and
the .sig file to verify the secure boot .bin file. You do not have to untar the .tar file to access the .bin file.
NOTE:
If you specify the .bin file, the .sig file MUST be in the same location as the .bin file.
Firmware downgrade not recommended
After you upgrade the firmware, Dell Technologies does not recommend downgrading to an earlier BIOS version. Downgrading
to an earlier BIOS version causes the AMI label to change. This AMI label change may cause an unwanted change to the NVRAM
variable layout.
CAUTION:
To avoid damage to your switch, never downgrade Z9432F-ON switches running BIOS version
3.40.0.9-8 and above to BIOS version 3.40.0.9-7 or below.
ONIE install mode recovery
For information about the ONIE install mode recovery process, see the Dell EMC PowerSwitch Z9432F-ON Release Notes.
BIOS version numbering change
The following describes the BIOS version nomenclature. The version X.Y.Z.U-V:
X
The processor family. For example, 3 for X86 on an Z9432F-ON switch.
Y
The platform ID within the processor family. For example, the Z9432F-ON switch is 51.
Z*
The image type. For example, BIOS = 0.
U
The bit definitions for the BIOS are from 0 through 5, as shown in the table.
V
The image version.
Table 3. BIOS bit definitions
Bit
0
1
2
3
4
5
*BIOS=0, ONIE=1, Grub=2, DIAG-OS=3, DIAG tools=4, and ONIE FW Updater=5.
CPLD version numbering change
The CPLD version nomenclature has changed. The new version is in the form of major.minor—the major release number
then the minor release number.
Feature
Partition
Baud rate
N/A
PXE
N/A
Bootloader
State
0=MBR, 1=UEFI
0=115200, 1=9600
N/A
1=supported
N/A
0=AMI BIOS
5
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