First, unplug the power cable from switch and Connect on PC with terminal emulation via console cable.
Power On the switch and press the Mode button.
Release the Mode button after approximately 15 seconds when the SYST LED turns solid green. When you release the Mode button, the SYST LED blinks green.
Issue the flash_init command.
switch: flash_init
Initializing Flash...
flashfs[0]: 143 files, 4 directories
flashfs[0]: 0 orphaned files, 0 orphaned directories
flashfs[0]: Total bytes: 3612672
flashfs[0]: Bytes used: 2729472
flashfs[0]: Bytes available: 883200
flashfs[0]: flashfs fsck took 86 seconds
....done Initializing Flash.
Issue the load_helper command.
switch: load_helper
Issue the dir flash: command.
Note: Make sure to type a colon ":" after the dir flash.
The switch file system is displayed:
switch: dir flash:
Directory of flash:/
2 -rwx 1803357 c3500xl-c3h2s-mz.120-5.WC7.bin
Type rename flash:config.text flash:config.old to rename the configuration file.
switch: rename flash:config.text flash:config.old
Issue the boot command to boot the system.
switch: boot
--- System Configuration Dialog ---
At any point you may enter a question mark '?' for help.
Use ctrl-c to abort configuration dialog at any prompt.
Default settings are in square brackets '[]'.
Continue with configuration dialog? [yes/no]: n
At the switch prompt, type en to enter enable mode.
Switch>en
Switch#
Type rename flash:config.old flash:config.text to rename the configuration file with its original name.
Switch#rename flash:config.old flash:config.text
Switch#copy flash:config.text system:running-config
Sw1# conf t
!--- To overwrite existing secret password
Sw1(config)#enable secret
!--- To overwrite existing enable password
Sw1(config)#enable password
Sw1#write memory
Building configuration...
[OK]
Sw1#