Cisco Catalyst 4500 Series Administration Guide

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Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
OL_28731-01
Chapter 56 Port Unicast and Multicast Flood Blocking
Configuring Port Blocking
<output truncated>
Port Protected: On
Unknown Unicast Traffic: Not Allowed
Unknown Multicast Traffic: Not Allowed
Broadcast Suppression Level: 100
Multicast Suppression Level: 100
Unicast Suppression Level: 100
Resuming Normal Forwarding on a Port
To resume normal forwarding on a port, perform this task:
Command Purpose
Step 1
Switch# configure terminal
Enters global configuration mode.
Step 2
Switch(config)# interface
interface-id
Enters interface configuration mode and enter the type and number of
the switch port interface (GigabitEthernet1/1).
Step 3
Switch(config-if)# no switchport
block multicast
Enables unknown multicast flooding to the port.
Step 4
Switch(config-if)# no switchport
block unicast
Enables unknown unicast flooding to the port.
Step 5
Switch(config)# end
Returns to privileged EXEC mode.
Step 6
Switch# show interface interface-id
switchport
Verifies your entry.
Step 7
Switch# copy running-config
startup-config
(Optional) Saves your entries in the configuration file.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E