Cisco 2950G 24 Software Configuration Guide - Page 425
on this port age out exactly after
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Chapter 18 Configuring Port-Based Traffic Control Configuring Port Security Beginning in privileged EXEC mode, follow these steps to configure port security aging: Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Command Purpose configure terminal Enter global configuration mode. interface interface-id Specify the port on which you want to enable port security aging, and enter interface configuration mode. switchport port-security aging {static | time time | type {absolute | inactivity}} Enable or disable static aging for the secure port, or set the aging time or type. Enter static to enable aging for statically configured secure addresses on this port. For time, specify the aging time for this port. The valid range is from 0 to 1440 minutes. If the time is equal to 0, aging is disabled for this port. For type, select one of these keywords: • absolute-Sets the aging type as absolute aging. All the secure addresses on this port age out exactly after the time (minutes) specified lapses and are removed from the secure address list. • inactivity-Sets 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 addresses for the specified time period. end Return to privileged EXEC mode. show port-security [interface interface-id] [address] Verify your entries. copy running-config startup-config (Optional) Save your entries in the configuration file. To disable port security aging for all secure addresses on a port, use the no switchport port-security aging time interface configuration command. To disable aging for only statically configured secure addresses, use the no switchport port-security aging static interface configuration command. This example shows how to set the aging time as 2 hours for the secure addresses on the Fast Ethernet interface 0/1: Switch(config)# interface fastethernet0/1 Switch(config-if)# switchport port-security aging time 120 This example shows how to set the aging time as 2 minutes for the inactivity aging type with aging enabled for the configured secure addresses on the interface: Switch(config-if)# switchport port-security aging time 2 Switch(config-if)# switchport port-security aging type inactivity Switch(config-if)# switchport port-security aging static You can verify the previous commands by entering the show port-security interface interface-id privileged EXEC command. 78-14982-01 Catalyst 2950 Desktop Switch Software Configuration Guide 18-11
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