开机后用户会看到屏幕上的提示信息
Broadcom NetXtreem Ethernet Boot Agent v7.7.5
Copyright (C) 2000-2004 Broadcom Corporation
All right reserved
Press Ctrl-S to Enter Configuration Menu ...
    

按Ctrl+S进入后，看到如下的界面，[]里的是其他的选项
Broadcom NetXtreem Ethernet Boot Agent v7.7.5
Copyright (C) 2000-2004 Broadcom Corporation
All right reserved
======================================================================================  

    MBA Configuration Menu

Boot Protocol                    Preboot eXecution Environment(PXE)
Boot Strap type                  Auto Detect
Hide Setup Prompt                Disable[Enable]
Setup Key Stroke                 Ctrl-S[Ctrl-B]
Banner Message Timeout           None[1 Second, 2 Second]
Link Speed                       AutoNeg[10Mbps Half,10Mbps Full,100Mbps Half,100Mbps Full]
Pre-Boot Wake On LAN             Enable

修改好之后按F4保存退出就可以了