Allied Telesis NETEXTREME II AT-2973SX - Manual (Page 44)

Chapter 3: Installing Broadcom Boot Agent Driver Software
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Note
The message prompting you to press CTRL+S is displayed once for
each Broadcom NetXtreme II adapter you have in your system that
has MBA enabled. The messages are displayed in the same order
as the assigned adapter device number.
3. Use the UP ARROW and DOWN ARROW keys to move to the Boot
Protocol menu item.
Note
If you have multiple adapters in your system and you are unsure
which adapter you are configuring, press CTRL+F6, which causes
the port LEDs on the adapter to start blinking.
4. Use the UP ARROW, DOWN ARROW, LEFT ARROW, and RIGHT
ARROW keys to move to and change the values for other menu items,
as desired.
5. Press F4 to save your settings.
6. Press ESC when you are finished.
Setting Up the
BIOS
To boot from the network with the MBA, make the MBA enabled adapter
the first bootable device under the BIOS. This procedure depends on the
system BIOS implementation. Refer to the user manual for the system
BIOS implementation for instructions.