SoFunction
Updated on 2025-04-13

3500 series switch password recovery

 

1. Unplug the switch’s power cord                                                                                                                          �

 

2. Connect the switch with a hyper terminal and a control line. The settings of the hyper terminal are:

9600 baud rate                                                 

No parity                                                            

8 data bits                                                       

1 stop bit                                                         

No flow control                                               

 

3. Press and hold the "mode" button on the front panel of the switch; plug in the power cord, and when the light on port 1 does not light, relax the "mode" button.

 

4. At this time, the hyper terminal should display:                                                                                                                          �

The system has been interrupted prior to initializing the flash file system.

 

The following commands will initialize the flash file system, and finish loading

 

the operating system software:                 

 

flash_init                                                         

load_helper                                                       

boot                                                                      

 

5. Enter flash_init

 

6. Enter load_helper

 

7. Enter dir flash:

This time it displays:

Directory of flash:                                       

2 -rwx 843947 Mar 01 1993 00:02:18 C2900XL-h-mz-112.8-SA

   4 drwx 3776 Mar 01 1993 01:23:24 html

66 -rwx 130 Jan 01 1970 00:01:19 env_vars

   68 -rwx 1296 Mar 01 1993 06:55:51

 

 1728000 bytes total (456704 bytes free)

 

 

8. Enter rename flash: flash:

9. Enter boot, restart the system                                                            �

 

10. After the system starts up, it displays: Continue with the configuration dialog? [yes/no] : Enter N

 

11. Enter enable

 

12. After entering enable mode, enter rename flash: flash:

 

 

13. Then follow the following steps:

 

Switch# copy flash: system:running-config

 

Source filename []? (press Return)

Destination filename[running-config]? (press Return)

 

14. Then follow the following steps:

switch#configure terminal

switch(config)#no enable secret

switch(config)#no enable password

switch(config)#exit

switch#write memory

 

At this time, the system will return to the state without a password

Article entry: csh     Editor in charge: csh