Cisco Catalyst 3750 Software Configuration Manual page 369

Chapter 18 Configuring Port-Based Traffic Control
Command
Step 6 switchport port-security violation
{protect | restrict | shutdown}
Step 7
switchport port-security
mac-address mac-address
[vlan vlan-id]
Step 8
switchport port-security
mac-address sticky
Step 9
switchport port-security
mac-address sticky mac-address
Step 10 end
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Purpose
(Optional) Set the violation mode, the action to be taken when a security
violation is detected, as one of these:
• protect—When the number of port secure MAC addresses reaches the
maximum limit allowed on the port, packets with unknown source
addresses are dropped until you remove a sufficient number of secure
MAC addresses to drop below the maximum value or increase the
number of maximum allowable addresses. You are not notified that a
security violation has occurred.
Note We do not recommend configuring the protect mode on a trunk port.
The protect mode disables learning when any VLAN reaches its
maximum limit, even if the port has not reached its maximum limit.
• restrict—When the number of secure MAC addresses reaches the limit
allowed on the port, packets with unknown source addresses are dropped
until you remove a sufficient number of secure MAC addresses or
increase the number of maximum allowable addresses. An SNMP trap is
sent, a syslog message is logged, and the violation counter increments.
• shutdown—The interface is error-disabled when a violation occurs, and
the port LED turns off. An SNMP trap is sent, a syslog message is logged,
and the violation counter increments.
When a secure port is in the error-disabled state, you can bring it out
Note
of this state by entering the errdisable recovery cause
psecure-violation global configuration command, or you can
manually re-enable it by entering the shutdown and no shutdown
interface configuration commands.
(Optional) Enter a secure MAC address for the interface. You can use this
command to enter the maximum number of secure MAC addresses. If you
configure fewer secure MAC addresses than the maximum, the remaining
MAC addresses are dynamically learned.
(Optional) On a trunk port, you can specify the VLAN ID and the MAC
address. If no VLAN ID is specified, the native VLAN is used.
Note If you enable sticky learning after you enter this command, the secure
addresses that were dynamically learned are converted to sticky
secure MAC addresses and are added to the running configuration.
(Optional) Enable sticky learning on the interface.
(Optional) Enter a sticky secure MAC address, repeating the command as
many times as necessary. If you configure fewer secure MAC addresses than
the maximum, the remaining MAC addresses are dynamically learned, are
converted to sticky secure MAC addresses, and are added to the running
configuration.
If you do not enable sticky learning before this command is entered,
Note
an error message appears, and you cannot enter a sticky secure MAC
address.
Return to privileged EXEC mode.
Catalyst 3750 Metro Switch Software Configuration Guide
Configuring Port Security
18-11