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比较简单，简单说就是进入bootload清除密码，然后进入default mode下重置密码。

1.开机按Ctrl+B，进入启动加载菜单（BootLoad menu）

拨电源重启交换机，大约开机10多秒的时候会出现提示按Ctrl+B可以进入BootLoad menu.

Last reset type: PowerOnPress Ctrl+B to enter BootLoad menu : 1 

2.清除console密码

Password: BootLoad Menu 1. Boot with default mode2. Enter startup submenu3. Enter ethernet submenu4. Enter filesystem submenu5. Enter password submenu6. Clear password for console user7. Reboot(Press Ctrl+E to enter diag menu)Enter your choice(1-7): 6    Note: Clear password for console user? Yes or No(Y/N): y    
Clear password for console user successfully. 

3.进入默认模式（default mode）

Note: Choose "1. Boot with default mode" to boot, then set a new password.Note: If the device is restarted during startup, you need to perform this operation again.BootLoad Menu 1. Boot with default mode2. Enter startup submenu3. Enter ethernet submenu4. Enter filesystem submenu5. Enter password submenu6. Clear password for console user7. Reboot(Press Ctrl+E to enter diag menu)Enter your choice(1-7): 1    Startup information : 1Read boot file: flash:/s5735-l1-v200r021c00spc600.cc 

4.设置密码

Recover configuration begin ...
Recover configuration end
Press ENTER to get started.An initial password is required for the first login via the console.
Set a password and keep it safe. Otherwise you will not be able to login via the console.Please configure the login password (8-16)
Enter Password:
Confirm Password:
Warning: The authentication mode was changed to password authentication and the user level was changed to 15 on con0 at the first user login.
Warning: There is a risk on the user-interface which you login through. Please change the configuration of the user-interface as soon as possible. Info: Smart-upgrade is currently disabled. Enable Smart-upgrade to get recommended version information.
<GZ-DG-FHYYB-AF-AS-S1>

5.保存配置并重启

配置如下：

user-interface con 0authentication-mode passwordset authentication password cipher $1a$/U[)(~F@>7$p<=fF:/-"1jtO|,7NM'(wYsxBK_'0YdABj'U%TCB$idle-timeout 5 0

保存并重启：

<GZ-DG-FHYYB-AF-AS-S1>save
The current configuration will be written to flash:/gz-dg-fhyyb-af-as-s1.cfg.
Are you sure to continue?[Y/N]y
Now saving the current configuration to the slot 0..
2024-7-13 00:14:46.570.2+08:00 GZ-DG-FHYYB-AF-AS-S1 %%01CFM/4/SAVE(s)[0]:The user chose Y when deciding whether to save the configuration to the device...
Save the configuration successfully.
<GZ-DG-FHYYB-AF-AS-S1>
<GZ-DG-FHYYB-AF-AS-S1>reboot
Info: The system is now comparing the configuration, please wait.......
Info: If want to reboot with saving diagnostic information, input 'N' and then execute 'reboot save diagnostic-information'.
System will reboot! Continue?[Y/N]:y
2024-7-13 00:18:28.810.2+08:00 GZ-DG-FHYYB-AF-AS-S1 %%01CMD/4/REBOOT(s)[2]:The user chose Y when deciding whether to reboot the system. (Task=co0, Ip=**, VpnName=, User=**)
Comparing the firmware versions
The latest firmware version is in use.
Info: System is rebooting, please wait...
Jul 13 2024 00:18:29+08:00 GZ-DG-FHYYB-AF-AS-S1 SYSMIB/4/RELOAD_END:1.3.6.1.4.1.56813.5.25.19.2.2 Reload operation completed
2024-7-13 00:18:29.730.1+08:00 GZ-DG-FHYYB-AF-AS-S1 %%01SRM/4/MSTRSCURST(l)[3]:Master SCU is reset.
2024-7-13 00:18:29.730.2+08:00 GZ-DG-FHYYB-AF-AS-S1 %%01SRM/4/RESETREASON(l)[4]:Board reset by VRP command or net manager, the barcode is: 4E21B0116269.
starting pid 1250, tty '': '/etUnmounting all filesystems: 
The system is going down NOW!
Sent SIGTERM to all processes

恢复出厂配置

命令：reset saved-configuration
然后在是否保存配置时，选择 n，不保存。

<GZ-DG-FHYYB-AF-AS-S1>reset saved-configuration 
Warning: The action will delete the saved configuration in the device.
The configuration will be erased to reconfigure. Continue? [Y/N]:y
Warning: Now clearing the configuration in the device..
2024-7-13 02:52:18.70.2+08:00 GZ-DG-FHYYB-AF-AS-S1 %%01CFM/4/RST_CFG(s)[0]:The user chose Y when deciding whether to reset the saved configuration.
Jul 13 2024 02:52:18+08:00 GZ-DG-FHYYB-AF-AS-S1 HWCM/4/CFGCHANGE:OID 1.3.6.1.4.1.56813.6.10.2.1 Configure changed. (EventIndex=3, CommandSource=1, ConfigSource=1, ConfigDestination=4)
Info: Succeeded in clearing the configuration in the device.
<GZ-DG-FHYYB-AF-AS-S1>
<GZ-DG-FHYYB-AF-AS-S1>reboot
<GZ-DG-FHYYB-AF-AS-S1>reboot 
Info: The system is now comparing the configuration, please wait................
Warning: The configuration has been modified, and it will be saved to the next startup saved-configuration file . Continue? [Y/N]:n
Info: If want to reboot with saving diagnostic information, input 'N' and then execute 'reboot save diagnostic-information'.
System will reboot! Continue?[Y/N]:y
Comparing the firmware versions
The latest firmware version is in use.
2024-7-13 02:52:46.590.2+08:00 GZ-DG-FHYYB-AF-AS-S1 
。。。。。。
Sent SIGKILL to all processes
Requesting system reboot