1、设备重加电启动，按Ctrl+B进入bootrom菜单；(密码是huawei)
2、修改启动配置文件名称
Main Menu
1. Default Startup
2. Serial Menu
3. Network Menu
4. Startup Select
5. File Manager
6. Reboot
Enter your choice(1-6):5 //选择5，文件管理
File Menu
1. Flash file system
2. SDCard file system
0. Return
Enter your choice(1-2):2 //AR1200系列路由器，选择1，Flash文件系统
//记住哦！AR2200&3200路由器不一样，选择2，SD1文件系统
//以下以AR2200系列路由器为例
SDCard file system MENU
1. List file in SDCard[1]
2. Delete file in SDCard[1]
3. Rename file in SDCard[1]
4. Format SDCard[1]
5. Check SDCard[1]
0. Return
Enter your choice(1-5):1 //选择1，显示SD1中的文件列表
Files of the device:
AR2220_V200R001C00SPC200.cc
web.zip
private-data.txt
logfile
mon_file.txt
mon_lpu_file.txt
vrpcfg.zip
7 files found!
1973735424 Byte total, 1716006912 Byte free.
SDCard file system MENU
1. List file in SDCard[1]
2. Delete file in SDCard[1]
3. Rename file in SDCard[1]
4. Format SDCard[1]
5. Check SDCard[1]
0. Return
Enter your choice(1-5):3 //选择修改文件名名
Please input the file name: vrpcfg.zip //输入原文件名
Please input the new name: vrpcfg_old.zip //输入目标文件名
Rename file[sd1:/vrpcfg.zip] to [sd1:/vrpcfg_old.zip], Yes or No(Y/N): y //选择y
Rename OK!
3、重新启动路由器，空配置启动后，无需密码登录设备
… …
Press any key to get started
//无需密码登录设备
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