Cisco Catalyst 2960 Command Reference Manual page 593

Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
Syntax Description Command
show interfaces
switchport
switchport block
OL-8604-03
Description
Displays the administrative and operational status of a switching port, including
port blocking and port protection settings.
Prevents unknown multicast or unicast traffic on the interface.
Catalyst 2960 Switch Command Reference
switchport protected
2-721