How To Configure Port Blocking - Cisco Catalyst 2960 series Configuration Manual

With multicast traffic, the port blocking feature blocks only pure Layer 2 packets. Multicast packets that
Note
contain IPv4 or IPv6 information in the header are not blocked.

How to Configure Port Blocking

Blocking Flooded Traffic on an Interface
Before You Begin
The interface can be a physical interface or an EtherChannel group. When you block multicast or unicast
traffic for a port channel, it is blocked on all ports in the port-channel group.
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
Command or Action
Step 1
enable
Example:
Switch> enable
Step 2 configure terminal
Example:
Switch# configure terminal
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
How to Configure Port Security
Purpose
Enables privileged EXEC mode. Enter your password
if prompted.
Enters the global configuration mode.
1505