Dell Catalyst 3130 Command Reference Manual page 829

Chapter 2 Cisco Catalyst Blade Switch 3120 for HP Cisco IOS Commands
Related Commands Command
show interfaces
switchport
switchport block
OL-12248-03
Description
Displays the administrative and operational status of a switching (nonrouting)
port, including port blocking and port protection settings.
Prevents unknown multicast or unicast traffic on the interface.
Cisco Catalyst Blade Switch 3120 for HP Command Reference
switchport protected
2-799