Product : VMware, vSphere/6.0, Enterprise Plus
Feature : Boot From SAN, Storage, Network and Storage
Content Owner:  Roman Macek
Summary
Yes (FC, iSCSI, FCoE and SW FCoE - NEW)
Details
vSphere 5.1 enhanced the software FCoE initiator to enable an ESXi 5.1 host to install to and boot from an FCoE LUN, using the software FCoE initiator (via a NIC) rather than requiring a dedicated FCoE hardware adapter.
Boot from iSCSI, FCoE, and Fibre Channel boot are supported (if booting from NIC then the network adapter must support iBFT)