1） 按下MODE鍵後給2950加電。
2） 在出現的菜單中選擇第一項
system software:
flash_init
load_helper
boot
switch:flash_init
3） 重命名flash:config.text文件。
switch: ren flash:config.text flash:config.old
switch: dir flash:
Directory of flash:/
2 -rwx 2664051 <date> c2950-i6q4l2-mz.121-11.EA1.bin
3 -rwx 269 <date> env_vars
4 -rwx 1531 <date> config.old
6 -rwx 556 <date> vlan.dat
7 drwx 704 <date> html
19 -rwx 109 <date> info
20 -rwx 109 <date> info.ver
21 -rwx 5 <date> private-config.text
3778560 bytes available (3962880 bytes used)
4） 重啓交換機
switch: boot
5） 當出現問你是否進行配置時，選擇NO（因爲它找不到配置文件config.text文件了）
Would you like to enter the initial configuration dialog? [yes/no]:no
6） 從用戶模式登錄特權模式，無需密碼。
Switch>en
Switch#
7） 恢復剛纔重命令的配置文件名.
Switch#rename flash:config.old flash:config.text
Destination filename [config.text]?直接回車
8） 用老的配置文件替換當前的配置文件。
Switch#copy flash:config.text system:running-config
Destination filename [running-config]?直接回車
% Login disabled on line 1, until 'password' is set
% Login disabled on line 2, until 'password' is set
% Login disabled on line 3, until 'password' is set
% Login disabled on line 4, until 'password' is set
% Login disabled on line 5, until 'password' is set
% Login disabled on line 6, until 'password' is set
% Login disabled on line 7, until 'password' is set
% Login disabled on line 8, until 'password' is set
% Login disabled on line 9, until 'password' is set
% Login disabled on line 10, until 'password' is set
% Login disabled on line 11, until 'password' is set
% Login disabled on line 12, until 'password' is set
% Login disabled on line 13, until 'password' is set
% Login disabled on line 14, until 'password' is set
% Login disabled on line 15, until 'password' is set
% Login disabled on line 16, until 'password' is set
1531 bytes copied in 2.364 secs (765 bytes/sec)
9） 修改使用密碼。
Switch#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#en secret adm0509
Switch(config)#
10） 重啓交換機，密碼已被改成adm0509.
Switch#reload
Proceed with reload? [confirm]