Cisco Catalyst 4500 Series, Software Configuration Manual

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55-7
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 55 Configuring Port Security
Configuring Port Security on Access Ports
–
Packets with a multicast or broadcast source MAC address
– Packets from an address either learned or configured on a secure interface that are observed on
another secure interface in the same VLAN
You can chose to rate limit these packets. If the rate is exceeded, you can trigger a violation action
for the port.
Configuring Port Security on Access Ports
These sections describe how to configure port security:
• Configuring Port Security on Access Ports, page 55-7
•
Examples of Port Security on Access Ports, page 55-10
Note
Port security can be enabled on a Layer 2 port channel interface configured in access mode. The port
security configuration on an EtherChannel is independent of the configuration of any member ports.
Configuring Port Security on Access Ports
To restrict traffic through a port by limiting and identifying MAC addresses of the stations allowed to
the port, perform this task:
Command Purpose
Step 1
Switch(config)# interface interface_id
interface port-channel port_channel_number
Enters interface configuration mode and specifies the
interface to configure.
Note
The interface can be a Layer 2 port channel
logical interface.
Step 2
Switch(config-if)# switchport mode access
Sets the interface mode.
Note
An interface in the default mode (dynamic auto)
cannot be configured as a secure port.
Step 3
Switch(config-if)# [ no ] switchport port-security
Enables port security on the interface.
To return the interface to the default condition as a not
secured, use the
no switchport port-security command.
Step 4
Switch(config-if)# [
no
]
switchport port-security
maximum value
(Optional) Sets the maximum number of secure MAC
addresses for the interface. The range is 1 to 3072; the
default is 1.
To return the interface to the default number of secure
MAC addresses, use the
no switchport port-security
maximum value .