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Catalyst 2960 Switch Software Configuration Guide
78-16881-01
Chapter 21 Configuring Port-Based Traffic Control
Configuring Port Security
Table 21-3 summarizes port security compatibility with other port-based features.
Enabling and Configuring Port Security
Beginning in privileged EXEC mode, follow these steps to restrict input to an interface by limiting and
identifying MAC addresses of the stations allowed to access the port:
Table 21-3 Port Security Compatibility with Other Switch Features
Type of Port or Feature on Port Compatible with Port Security
DTP
1
port
2
1. DTP = Dynamic Trunking Protocol
2. A port configured with the switchport mode dynamic interface configuration command.
No
Trunk port Yes
Dynamic-access port
3
3. A VLAN Query Protocol (VQP) port configured with the switchport access vlan dynamic interface configuration command.
No
SPAN source port Yes
SPAN destination port No
EtherChannel No
Protected port Yes
IEEE 802.1x port Yes
Voice VLAN port
4
4. You must set the maximum allowed secure addresses on the port to two plus the maximum number of secure addresses
allowed on the access VLAN.
Yes
Flex Links Yes
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Specify the interface to be configured, and enter interface configuration
mode.
Step 3
switchport mode {access | trunk} Set the interface switchport mode as access or trunk; an interface in the
default mode (dynamic auto) cannot be configured as a secure port.
Step 4
switchport voice vlan vlan-id Enable voice VLAN on a port.
vlan-id—Specify the VLAN to be used for voice traffic.
Step 5
switchport port-security Enable port security on the interface.