Cisco Catalyst 2960 Command Reference Manual page 407

Chapter 2 Catalyst 2960 Switch Cisco IOS Commands
Related Commands Command
clear port-security
switchport port-security
78-16882-01
Description
Deletes from the MAC address table a specific type of secure address
or all the secure addresses on the switch or an interface.
Enables port security on a port, restricts the use of the port to a
user-defined group of stations, and configures secure MAC
addresses.
Catalyst 2960 Switch Command Reference
show port-security
2-379