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Catalyst 3750 Switch Command Reference
OL-8552-07
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
show port-security
show port-security
Use the show port-security privileged EXEC command to display port-security settings for an interface
or for the switch.
show port-security [interface interface-id] [address | vlan] [ | {begin | exclude | include}
expression]
Syntax Description
Command Modes Privileged EXEC
Command History
Usage Guidelines If you enter the command without keywords, the output includes the administrative and operational
status of all secure ports on the switch.
If you enter an interface-id, the command displays port security settings for the interface.
If you enter the address keyword, the command displays the secure MAC addresses for all interfaces
and the aging information for each secure address.
If you enter an interface-id and the address keyword, the command displays all the MAC addresses for
the interface with aging information for each secure address. You can also use this command to display
all the MAC addresses for an interface even if you have not enabled port security on it.
If you enter the vlan keyword, the command displays the configured maximum and the current number
of secure MAC addresses for all VLANs on the interface. This option is visible only on interfaces that
have the switchport mode set to trunk.
Expressions are case sensitive. For example, if you enter | exclude output, the lines that contain output
do not appear, but the lines that contain Output appear.
interface interface-id (Optional) Display port security settings for the specified interface. Valid
interfaces include physical ports (including type, stack member, module,
and port number).
address (Optional) Display all secure MAC addresses on all ports or a specified port.
vlan (Optional) Display port security settings for all VLANs on the specified
interface. This keyword is visible only on interfaces that have the switchport
mode set to trunk.
| begin (Optional) Display begins with the line that matches the expression.
| exclude (Optional) Display excludes lines that match the expression.
| include (Optional) Display includes lines that match the specified expression.
expression Expression in the output to use as a reference point.
Release Modification
12.1(11)AX This command was introduced.
12.1(14)EA1 The vlan keyword was added (visible only on trunk ports).
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