How to Reset a Cisco Catalyst 3550 / 3560 Switch to Factory Defaults


Enter the following commands in the privileged mode: (# prompt)


delete flash:vlan.dat

Switch#delete flash:vlan.dat
Delete filename [vlan.dat]?
Delete flash:vlan.dat? [confirm]

erase startup-config

Switch#erase startup-config
Erasing the nvram filesystem will remove all configuration files! Continue? [con
Erase of nvram: complete
00:04:46: %SYS-7-NV_BLOCK_INIT: Initialized the geometry of nvram


If you are prompted to save anything before reloading, respond by saying no.

After the switch reloads you should get the initial config prompt.