6.5.1

Table Of Contents
3 After the successful connection, the iSCSI boot firmware writes the networking and iSCSI boot
parameters in to the iBFT. The firmware stores the table in the system memory.
Note The system uses this table to configure its own iSCSI connection and networking and to start
up.
4 The BIOS boots the boot device.
5 The VMkernel starts loading and takes over the boot operation.
6 Using the boot parameters from the iBFT, the VMkernel connects to the iSCSI target.
7 After the iSCSI connection is established, the system boots.
iBFT iSCSI Boot Considerations
When you boot the ESXi host from iSCSI using iBFT-enabled network adapters, certain considerations
apply.
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Update your NIC's boot code and iBFT firmware using vendor supplied tools before trying to install
and boot VMware ESXi. Consult vendor documentation and VMware HCL for supported boot code
and iBFT firmware versions for VMware ESXi iBFT boot.
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The iBFT iSCSI boot does not support failover for the iBFT-enabled network adapters.
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After you set up your host to boot from iBFT iSCSI, the following restrictions apply:
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You cannot disable the software iSCSI adapter. If the iBFT configuration is present in the BIOS,
the host re-enables the software iSCSI adapter during each reboot.
Note If you do not use the iBFT-enabled network adapter for the iSCSI boot and do not want the
software iSCSI adapter to be always enabled, remove the iBFT configuration from the network
adapter.
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You cannot remove the iBFT iSCSI boot target using the vSphere Web Client. The target appears
on the list of adapter static targets.
Configuring iBFT Boot from SAN
You can boot from the iSCSI SAN using the software iSCSI adapter or a dependent hardware iSCSI
adapter and a network adapter. The network adapter must support iBFT.
When you set up your host to boot with iBFT, you perform a number of tasks.
1 Configure iSCSI Boot Parameters
To begin an iSCSI boot process, a network adapter on your host must have a specially configured
iSCSI boot firmware. When you configure the firmware, you specify the networking and iSCSI
parameters and enable the adapter for the iSCSI boot.
2 Change Boot Sequence in BIOS
When setting up your host to boot from iBFT iSCSI, change the boot sequence to force your host to
boot in an appropriate order.
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