Cisco Catalyst 3550 User Manual

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Catalyst 3550 Multilayer Switch Command Reference
OL-8566-01
Chapter 2 Catalyst 3550 Switch Cisco IOS Commands
switchport port-security aging
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.
switchport port-security aging {static | time time | type {absolute | inactivity}}
no switchport port-security aging {static | time | type}
Syntax Description
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
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.
Note The absolute aging time could vary by 1 minute, depending on the sequence of the system timer.
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.
static Enable aging for statically configured secure addresses on this port.
time time 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.
type absolute 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.
type inactivity 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.
Release Modification
12.1(9)EA1 This command was introduced.

Cisco Catalyst 3550 Specifications

General

Category	Switch
QoS	Yes
Form Factor	Rack-mountable
Manageable	Yes
RAM	64 MB
Model	Catalyst 3550
Uplink Ports	2 x GBIC (Gigabit Interface Converter) or SFP (Small Form-factor Pluggable)
Layer Support	Layer 3
VLAN Support	Yes
MAC Address Table Size	12000 entries
Routing Protocol	EIGRP
Features	QoS
Operating Temperature	32 to 113°F (0 to 45°C)
Operating Humidity	10 - 95% (non-condensing)
Ports	24 or 48 10/100 ports