Your ESXi host can boot from a FCoE LUN using the software FCoE adapter a network adapter.
When you configure your host for a software FCoE boot, you perform a number of tasks.
The network adapter has the following capabilities:
Support partial FCoE offload (software FCoE).
Contain either a FCoE Boot Firmware Table (FBFT) or a FCoE Boot Parameter Table (FBPT).
For information about network adapters that support software FCoE boot, see the vSphere Compatibility Guide.