22-11
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-07
Chapter 22 Configuring Port-Based Traffic Control
Configuring Port Security
Default Port Security Configuration
Table 22-2 shows the default port security configuration for an interface.
Port Security Configuration Guidelines
• Port security can only be configured on static access ports or trunk ports. A secure port cannot be a
dynamic access port.
• A secure port cannot be a destination port for Switched Port Analyzer (SPAN).
• A secure port cannot belong to a Fast EtherChannel or a Gigabit EtherChannel port group.
• A secure port cannot be a private-VLAN port.
• When a trunk port configured with port security and assigned to an access VLAN for data traffic and
to a voice VLAN for voice traffic, entering the switchport voice and switchport priority extend
interface configuration commands has no effect.
When a connected device uses the same MAC address to request an IP address for the access VLAN
and then an IP address for the voice VLAN, only the access VLAN is assigned an IP address.
• 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.
Table 22-3 summarizes port security compatibility with other port-based features.
Ta b l e 22-2 Default Port Security Configuration
Feature Default Setting
Port security Disabled on a port.
Sticky address learning Disabled.
Maximum number of secure
MAC addresses per port
1.
Violation mode Shutdown. The port shuts down when the maximum number of
secure MAC addresses is exceeded.
Port security aging Disabled. Aging time is 0.
Static aging is disabled.
Type is absolute.
Ta b l e 22-3 Port Security Compatibility with Other Switch Features
Type of Port or Feature on Port
Compatible with
Port Security
Trunk port Yes
Dynamic-access port (a VLAN Query Protocol [VQP] port configured with the
switchport access vlan dynamic interface configuration command)
No
Routed port No
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