Cisco Small Business Managed Switches (Linksys Business Series)

If you do not know or have forgotten your password to get into the switch's configuration interface, you may try running the Password Recovery. This is a solution which allows the user login to the switch using its default username ("admin"). 

Performing Password Recovery (Accton Switches - SRW224P, SRW2024P) 

Step 1:
Connect to the console port using terminal emulation parameters (typically 38400, 8, 0, 1, None).

Step 2:
Reboot switch by unplugging the power.

Step 3:
Hold down Ctrl U while rebooting to display Menu.

Step 4:
Select [D] Delete file.

Step 5:
Type "startup-config" (be sure that this is the ONLY file that you delete - if you delete other files, you will have to reload the firmware)

Step 6:
Now, you have erased the configuration file and you should be able to reboot and login with the default username and password.

Performing Password Recovery (Marvell Switches - SRW2016, SRW2024, SRW2048, SRW224G4, SRW248G4)

Step 1:
Connect to the console port using terminal emulation parameters (typically 38400, 8, 0, 1, None).

Step 2:
Reboot the switch by unplugging the power.

Step 3:
After viewing PASS on the screen, Press ESC on your keyboard to display the BOOTmenu.

Step 4:
Select [3] Password Recovery Procedure.

Step 5:
You can now login to the switches with the default username and password. 

Note: Be sure to change the password to something you can easily remember. After rebooting, the default password will not be accessible unless you add it back to the list of passwords. The passwords will be restored to the passwords configured on the switch.