Cisco Catalyst 2960 Series, Configuration Manual

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SUMMARY STEPS
1.
enable
2. configure terminal
3.
interface interface-id
4.
switchport block multicast
5. switchport block unicast
6.
end
7. show interfaces interface-id switchport
8. show running-config
9.
copy running-config startup-config
DETAILED STEPS
Purpose Command or Action
Enables privileged EXEC mode. Enter your password
if prompted.
enable
Example:
Switch>
enable
Step 1
Enters the global configuration mode. configure terminal
Example:
Switch# configure terminal
Step 2
Specifies the interface to be configured, and enter
interface configuration mode.
interface interface-id
Example:
Switch(config)#
interface gigabitethernet1/0/1
Step 3
Blocks unknown multicast forwarding out of the port. switchport block multicast Step 4
Example:
Switch(config-if)# switchport block multicast
Pure Layer 2 multicast traffic as well as
multicast packets that contain IPv6 information
in the header are blocked. Note
Blocks unknown unicast forwarding out of the port. switchport block unicast
Example:
Switch(config-if)#
switchport block unicast
Step 5
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
1478
How to Configure Port Blocking