Switchport Port-Security Aging - Cisco Catalyst 3550 Command Reference Manual

Chapter 2 Catalyst 3550 Switch Cisco IOS Commands

switchport port-security aging

Use the switchport port-security aging interface configuration command to set the aging time and type
for secure address entries or to change the aging behavior for statically configured secure addresses on
a particular port. Use the no form of this command to return to the default settings.
Syntax Description
static
time time
type absolute
type inactivity
Defaults
The port security aging feature is disabled. The default time is 0 minutes.
The default aging type is absolute.
The default static aging behavior is disabled.
Command Modes Interface configuration
Command History Release
12.1(9)EA1
Usage Guidelines
To enable secure address aging for a particular port, set the aging time to a value other than 0 for that
port.
To allow limited-time access to specific secure MAC addresses, set the aging type as absolute. When
the aging time lapses, the secure addresses are deleted. When the device sends traffic again, the deleted
secure addresses are relearned.
The absolute aging time could vary by 1 minute, depending on the sequence of the system timer.
Note
To allow continuous access to a limited number of secure addresses, set the aging type as inactivity.
This removes the secure address when it become inactive, and other addresses can become secure.
OL-8566-01
switchport port-security aging {static | time time | type {absolute | inactivity}}
no switchport port-security aging {static | time | type}
Enable aging for statically configured secure addresses on this port.
Specify the aging time for this port. The range is 0 to 1440 minutes. If the time
is 0, aging is disabled for this port.
Set the aging type as absolute aging. All the secure addresses on this port age
out after the time (minutes) specified and are removed from the secure address
list.
Set the aging type as inactivity aging. The secure addresses on this port age out
only if there is no data traffic from the secure source address for the specified
time period.
Modification
This command was introduced.
Catalyst 3550 Multilayer Switch Command Reference
switchport port-security aging
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