The easiest and cleaner way after the clone, is to completely reset ESXi system configurations
I find the "reset system configuration" in DCUI very useful for this task.
There is also a way to perform this task via SSH:
# /sbin/firmwareConfig.sh --reset (this will automatically reboot your host)
# /sbin/firmwareConfig.sh --reset-only (this will not reboot host and needs to be done manually)
However, if you do not want to start from scratch you can tweek cloned system. The process is inspired by
https://www.virtuallyghetto.com/2013/12/how-to-properly-clone-nested-esxi-vm.html
# to inherit vmknic MAC addresses from hardware NICs (actually vNICs)
esxcli system settings advanced set -o /Net/FollowHardwareMac -i 1
#verification
esxcli system settings advanced list -o /Net/FollowHardwareMac
# change IP settings and DNS hostname
Do it in DCUI
# reset ESXi UUID
sed -i 's/system\/uuid.*//' /etc/vmware/esx.conf
reboot
# Verification of ESXi UUID - esxcli
esxcli system uuid get
# Verification of ESXi UUIDs for all ESXi hosts within vCenter - powercli
Get-VMHost | Select Name,@{N='ESXi System UUid';E={(Get-Esxcli -VMHost $_).system.uuid.get()}}
# if the ESXi host was cloned from the ESXi host already connected to vCenter reset VPXA config
edit file /etc/vmware/vpxa/vpxa.cfg
locate section <vpxa></vpxa> and delete all content inside
reboot
# just in case local datastore was cloned along with ESXi
esxcli storage vmfs snapshot resignature -l datastore1
# NOTE: to have nested vSAN on native vSAN, you have to add following settings into your physical vSAN nodes
esxcli system settings advanced set -o /VSAN/FakeSCSIReservations -i 1
UNDERLINE INFO
# Historicky se pry pouzivala tato nastaveni
esxcli system settings advanced set -o /VMFS3/HardwareAcceleratedLocking -i 1
esxcli system settings advanced set -o /LSOM/VSANDeviceMonitoring -i 0
esxcli system settings advanced set -o /LSOM/lsomSlowDeviceUnmount -i 0
esxcli system settings advanced set -o /VSAN/SwapThickProvisionDisabled -i 1
esxcli system settings advanced set -o /VSAN/FakeSCSIReservations -i 1
esxcli system settings advanced list -o /VMFS3/HardwareAcceleratedLocking
esxcli system settings advanced list -o /LSOM/VSANDeviceMonitoring
esxcli system settings advanced list -o /LSOM/lsomSlowDeviceUnmount
esxcli system settings advanced list -o /VSAN/SwapThickProvisionDisabled
esxcli system settings advanced list -o /VSAN/FakeSCSIReservations
# Default hodnoty jsou
esxcli system settings advanced set -o /VMFS3/HardwareAcceleratedLocking -i 1
esxcli system settings advanced set -o /LSOM/VSANDeviceMonitoring -i 1
esxcli system settings advanced set -o /LSOM/lsomSlowDeviceUnmount -i 1
esxcli system settings advanced set -o /VSAN/SwapThickProvisionDisabled -i 1
esxcli system settings advanced set -o /VSAN/FakeSCSIReservations -i 1
