Cisco Catalyst 3750 Command Reference Manual page 479

Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
Related Commands Command
switchport port-security
78-16181-03
Description
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 3750 Switch Command Reference
show port-security
2-451