Allied Telesis AT-2972T/2 - Manual (Page 96)

Installing the Boot Agent Driver Software
96
Overview
The Allied Telesis AT-29xx Series Gigabit Ethernet network adapters
provide PXE (Preboot Execution Environment) support.
PXE is enabled by default. To enable or disable PXE, refer to the
b57udiag.pdf document located in the diagnostics directory.
Setup BIOS To boot from the network with PXE, make PXE the first bootable device
under BIOS. This procedure depends on server BIOS implementation.
Please refer to the server's user manual.