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Catalyst2950 and Catalyst2955 Switch Software Configuration Guide
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Chapter22 Configuring Port-Based Tra ffic Control Configuring Port Security
Default Port Security Configuration
Table22-2 shows the default port security configuration for an interface.
Port Security Configuration Guidelines
Follow these guidelines when configuring port security:
•Port security can only be configured on static access ports.
•A secure port cannot be a dynamic access port or a trunk port.
•A secure port cannot be a destination port for Switched Port Ana lyze r (SPAN).
•A secure port cannot belong to a Fast EtherChannel or Gigabi t E the rChann el por t gr oup .
•You cannot configure static secure or sticky secure MAC addresses on a voice VLAN.
•When you enable port security on an interface that is also configured with a voice VLAN, you must
set the maximum allowed secure addresses on the port to at least two.
•If any type of port security is enabled on the access VLAN, dynamic port security is automatically
enabled on the voice VLAN.
•When a voice VLAN is configured on a secure port that is also configured as a sticky secure port,
all addresses seen on the voice VLAN are learned as dynamic secure addresses, and all addresses
seen on the access VLAN (to which the port belongs) are learned as sticky secure addresses.
•You cannot configure port security on a per-VLAN basis.
•The switch does not support port security aging of sticky secure MAC addresses.
•The protect and restrict options cannot be simultaneously e nabled on an interface .
Table22-2 Default Port Security Configuration
Feature Default Setting
Port security Disabled.
Maximum number of secure MAC addresses One.
Violation mode Shutdown.
Sticky address learning Disabled.
Port security aging Disabled. Aging time is 0. When enabled, the default
type is absolute.