Default Port Security Configuration; Port Security Configuration Guidelines - Cisco Catalyst 3750-E Software Configuration Manual

Chapter 26 Configuring Port-Based Traffic Control
Table 26-1 Security Violation Mode Actions
Traffic is
Violation Mode forwarded
protect No
restrict No
shutdown No
shutdown vlan No
1. Packets with unknown source addresses are dropped until you remove a sufficient number of secure MAC addresses.
2. The switch returns an error message if you manually configure an address that would cause a security violation.
3. Shuts down only the VLAN on which the violation occurred.

Default Port Security Configuration

Table 26-2
Feature
Port security
Sticky address learning
Maximum number of secure
MAC addresses per port
Violation mode
Port security aging

Port Security Configuration Guidelines

•
•
•
•
•
OL-9775-08
Sends SNMP
1
trap
No
Yes
No
No
Default Port Security Configuration
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 Gigabit EtherChannel port group.
Voice VLAN is only supported on access ports and not on trunk ports, even though the
Note
configuration is allowed.
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
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
Sends syslog Displays error
message message
No No
Yes No
No
No
Yes No
Default Setting
Disabled on a port.
Disabled.
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.
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
Configuring Port Security
Violation
counter
2
increments
No
Yes
Yes
Yes
Shuts down port
No
No
Yes
3
No
26-11