Cisco me 3400 Guida Al Software

switchport port-security 
[maximum value [vlan vlan-list | 
access]

(Optional) Set the maximum number of secure MAC addresses for the 
interface. The maximum number of secure MAC addresses that you can 
configure on a switch is set by the maximum number of available MAC 
addresses allowed in the system. This number is set by the active Switch 
Database Management (SDM) template. See 

 This number is the total of available MAC addresses, including 

those used for other Layer 2 functions and any other secure MAC addresses 
configured on interfaces.

(Optional) vlan—set a per-VLAN maximum value.

Enter one of these options after you enter the vlan keyword:

vlan-list—On a trunk port, you can set a per-VLAN maximum value on 
a range of VLANs separated by a hyphen or a series of VLANs separated 
by commas. For nonspecified VLANs, the per-VLAN maximum value is 
used.

access—On an access port, specify the VLAN as an access VLAN. 

switchport port-security violation 
{protect | restrict | shutdown}

(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.

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 
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.