Port Security Configuration Guidelines - Cisco Catalyst 2960-XR Security Configuration Manual

Configuring Port-Based Traffic Control
Feature
Maximum number of secure MAC
addresses per port
Violation mode
Port security aging

Port Security Configuration Guidelines

• Port security can only be configured on static access ports or trunk ports. A secure port cannot be a
• A secure port cannot be a destination port for Switched Port Analyzer (SPAN).
• A secure port cannot belong to a Gigabit EtherChannel port group.
• A secure port cannot be a private-VLAN port.
• When you enable port security on an interface that is also configured with a voice VLAN, set the
• When a trunk port configured with port security and assigned to an access VLAN for data traffic and to
• When you enter a maximum secure address value for an interface, and the new value is greater than the
• The switch does not support port security aging of sticky secure MAC addresses.
This table summarizes port security compatibility with other port-based features.
OL-29434-01
dynamic access port.
Voice VLAN is only supported on access ports and not on trunk ports, even though the
Note
configuration is allowed.
maximum allowed secure addresses on the port to two. When the port is connected to a Cisco IP phone,
the IP phone requires one MAC address. The Cisco IP phone address is learned on the voice VLAN,
but is not learned on the access VLAN. If you connect a single PC to the Cisco IP phone, no additional
MAC addresses are required. If you connect more than one PC to the Cisco IP phone, you must configure
enough secure addresses to allow one for each PC and one for the phone.
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.
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.
Catalyst 2960-XR Switch Security Configuration Guide, Cisco IOS Release 15.0(2)EX1
Default Setting
1.
Shutdown. The port shuts down when the maximum number of secure
MAC addresses is exceeded.
Disabled. Aging time is 0.
Static aging is disabled.
Type is absolute.
Port Security Configuration Guidelines
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