How to reset cisco 2960 to factory default?

1. Reset a Cisco 2960 Switch to Factory Default
Flattening a switch before re-deployment is one of those simple tasks that I always
find myself having lookup on the web, so I thought I’d save myself some time in
future and document it here.
Step1.
Connect up your console cable and power on the switch, whilst holding down the
“mode” button:
This interrupts the boot process before the Flash file system can initialize, and after a
short while (continue holding the “mode” button) you will see the following prompt:
Using driver version 1 for media type 1
Base ethernet MAC Address: 4c:30:2d:81:ef:80
Xmodem file system is available.
The password-recovery mechanism is enabled.
The system has been interrupted prior to initializing the
flash filesystem. The following commands will initialize
the flash filesystem, and finish loading the operating
system software:
flash_init
boot
switch:
Step2.
Initialize the flash file system with the command: flash_init
switch: flash_init
Initializing Flash...
mifs[2]: 10 files, 1 directories
mifs[2]: Total bytes : 1806336
mifs[2]: Bytes used : 612352
mifs[2]: Bytes available : 1193984
mifs[2]: mifs fsck took 1 seconds.
mifs[3]: 0 files, 1 directories
mifs[3]: Total bytes : 3870720
mifs[3]: Bytes used : 1024
mifs[3]: Bytes available : 3869696

2. mifs[3]: mifs fsck took 0 seconds.
mifs[4]: 5 files, 1 directories
mifs[4]: Total bytes : 258048
mifs[4]: Bytes used : 9216
mifs[4]: Bytes available : 248832
mifs[4]: mifs fsck took 0 seconds.
mifs[5]: 5 files, 1 directories
mifs[5]: Total bytes : 258048
mifs[5]: Bytes used : 9216
mifs[5]: Bytes available : 248832
mifs[5]: mifs fsck took 1 seconds.
-- MORE --
mifs[6]: 566 files, 19 directories
mifs[6]: Total bytes : 57931776
mifs[6]: Bytes used : 28429312
mifs[6]: Bytes available : 29502464
mifs[6]: mifs fsck took 21 seconds.
...done Initializing Flash.
Step3.
Delete the config.text file from the flash directory:
switch: del flash:config.text
Are you sure you want to delete "flash:config.text" (y/n)?y
File "flash:config.text" deleted
Step4.
Delete the vlan.dat file from the flash directory:
switch: del flash:vlan.dat
Are you sure you want to delete "vlan.dat" (y/n)?y
File "flash:vlan.dat" deleted
Step5.
Reboot the switch and you're done:
switch: boot
Loading "flash:c2960s-universalk9-mz.122-58.SE2.bin"...
--- System Configuration Dialog ---
Enable secret warning
----------------------------------
In order to access the device manager, an enable secret is required
If you enter the initial configuration dialog, you will be prompted for the enable
secret
If you choose not to enter the intial configuration dialog, or if you exit setup without
setting the enable secret,
please set an enable secret using the following CLI in configuration mode-

3. enable secret 0 <cleartext password>
----------------------------------
Would you like to enter the initial configuration dialog? [yes/no]:
% Please answer 'yes' or 'no'.
More Qs of Resetting a Cisco 2960 Series:
Q: “I have a number of 2960s that I have inherited and there is no documentation on
the setup and NO passwords. I need to change setting so I can deploy WDS images
which is not presently possible with the present switch configurations. By resetting I
can hopefully accomplish this AND create documentation so the next idiot who takes
over these sites doesn't go through the same hell as me.”
Quite Basic process to reset a Cisco 2960G switch back to factory defaults if you don’t
know the passwords of the switch:
1. Hook up a console cable to the Console Port and use Putty or other serial
client to view the Console session
2. Hold down the Mode button on the front of the switch and power it up
3. When the SYST light stops blinking, let go of the SYST button
4. You should see the switch booting up in your console session
5. When presented with switch: type flash_init and hit enter
6. Once it finishes loading, you need to delete some files in the flash. List the files
by entering dir flash: (don’t forget the : at the end)
7. Delete the config by entering del flash:config.txt
8. You may also have VLANS set up on the switch, so you need to delete that info
as well, del flash:vlan.dat
9. Now type boot and hit enter to reboot the switch
More Cisco 2960 Tips:
How to Configure the Voice VLAN Feature on the Catalyst 2960 and 2960-S
Switches?
Cisco 2960 vs. Catalyst 3560
Cisco Catalyst 2960-X Series Switches Debut at Cisco Partner Summit