Unplug the power supply from the back of the switch
Press and hold the Mode button on the front of the switch
Plug the switch back in
Wait until the LED above port 1X goes out, and then release the Mode button
This allows you to access the Systems-Engineering menu, which is a diagnostic menu for troubleshooting issues
Press to continue
Press to display the Systems-Engineering menu
Note which rmware version is on the switch
Password Recovery for Firmware 1.10 or Later
Power-cycle the switch
Unplug, then plug the switch back in
After POST complete, you see the following:
Do you wish to clear the passwords? [Y]es or [N]o
You have 10 seconds to respond
Enter Y to delete the password
Assign a new password from either the menu console or the CLI
As per the section on assigning passwords in this chapter
To View the Password You Are Trying to Recover
Valid on Firmware Between 1.10 and 3.02
Wait until the LED above port 1X goes out, then release the Mode button
Press
Select S on the Diagnostic-Console Systems= Engineering menu
Select V on the System-Debug interface
Displays the management console password
Select M option on the Console Settings menu
Password Recovery for Firmware 1.09 and Earlier
You must contact Cisco Technical Assistance Center (TAC)
Make sure you have the switch serial number or MAC address of the switch