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Chapter 21
Configuring Port-Based Traffic Control
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Table 21-3
Table 21-3
Type of Port or Feature on Port
Trunk port
Dynamic-access port (a VLAN Query Protocol [VQP] port configured with the
switchport access vlan dynamic interface configuration command)
Routed port
SPAN source port
SPAN destination port
EtherChannel
Tunneling port
Protected port
802.1x port
Private VLAN port
IP source guard
Dynamic Address Resolution Protocol (ARP) inspection
Flex Links
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:
Command
Step 1
configure terminal
Step 2
interface interface-id
Step 3
no shutdown
Step 4
switchport mode {access | trunk}
Step 5
switchport port-security
78-17058-01
When you enter a maximum secure address value for an interface, and the new value is greater than
the previous value, the new value overwrites the previously configured value. If the new value is less
than the previous value and the number of configured secure addresses on the interface exceeds the
new value, the command is rejected.
The switch does not support port security aging of sticky secure MAC addresses.
summarizes port security compatibility with other port-based features.
Port Security Compatibility with Other Switch Features
Purpose
Enter global configuration mode.
Specify the interface to be configured, and enter interface configuration
mode.
Enable the port, if necessary. By default, UNIs are disabled, and NNIs are
enabled.
Set the interface switchport mode as access or trunk; an interface in the
default mode (dynamic auto) cannot be configured as a secure port.
Enable port security on the interface.
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
Configuring Port Security
Compatible with
Port Security
Yes
No
No
Yes
No
No
Yes
Yes
Yes
No
Yes
Yes
Yes
21-11
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Troubleshooting
