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Configuring Port Security
Command
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
Step 11
show port-security
Step 12
copy running-config
startup-config
To return the interface to the default condition as not a secure port, use the no switchport port-security
interface configuration command. If you enter this command when sticky learning is enabled, the sticky
secure addresses remain part of the running configuration but are removed from the address table. All
addresses are now dynamically learned.
To return the interface to the default number of secure MAC addresses, use the no switchport
port-security maximum value interface configuration command. To return the violation mode to the
default condition (shutdown mode), use the no switchport port-security violation {protocol | restrict}
interface configuration command.
To disable sticky learning on an interface, use the no switchport port-security mac-address sticky
interface configuration command. The interface converts the sticky secure MAC addresses to dynamic
secure addresses. However, if you have previously saved the configuration with the sticky MAC
addresses, you should save the configuration again after entering the no switchport port-security
mac-address sticky command, or the sticky addresses will be restored if the switch reboots.
To delete a specific secure MAC address from the address table, use the no switchport port-security
mac-address mac-address interface configuration command.
To delete all dynamic secure addresses on an interface from the address table, enter the no switchport
port-security interface configuration command followed by the switchport port-security command (to
re-enable port security on the interface). If you use the no switchport port-security mac-address sticky
interface configuration command to convert sticky secure MAC addresses to dynamic secure MAC
addresses before entering the no switchport port-security command, all secure addresses on the
interface except those that were manually configured are deleted.
Catalyst 3750 Switch Software Configuration Guide
24-12
Purpose
(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.
If you enable sticky learning after you enter this command, the secure
Note
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.
Note
If you do not enable sticky learning before this command is entered,
an error message appears, and you cannot enter a sticky secure MAC
address.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Chapter 24
Configuring Port-Based Traffic Control
78-16180-02
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Troubleshooting
