Cisco Catalyst 2950 Command Reference

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Catalyst 2950 and Catalyst 2955 Switch Command Reference
OL-10102-01
Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands
mac address-table aging-time
mac address-table aging-time
Use the mac address-table aging-time global configuration command to set the length of time that a
dynamic entry remains in the MAC address table after the entry is used or updated. Use the no form of
this command to return to the default setting. The aging time applies to all VLANs.
mac address-table aging-time [0 | 10–1000000]
no mac address-table aging-time [0 | 10–1000000]
Note Beginning with Cisco IOS Release 12.1(11)EA1, the mac address-table aging-time command replaces
the mac-address-table aging-time command (with the hyphen).
Syntax Description
Defaults The default is 300 seconds.
Command Modes Global configuration
Command History
Usage Guidelines If hosts do not send continuously, increase the aging time to record the dynamic entries for a longer time.
This reduces the possibility of flooding when the hosts send again.
Examples This example shows how to set the aging time to 200 seconds:
Switch(config)# mac address-table aging-time 200
This example shows how to disable aging in VLAN 1.
Switch(config)# mac address-table aging-time 0
This example shows how to set aging time to 450 seconds for all VLANs for which the user did not
specify aging time:
Switch(config)# mac address-table aging-time 450
0 This value disables aging. Static address entries are never aged or removed from
the table.
10–100000 Aging time in seconds. The range is 10 to 1000000 seconds.
Release Modification
12.0(5.2)WC(1) This command was introduced.
12.1(6)EA2 The aging-time values were modified.
12.1(11)EA1 The mac-address-table aging-time command was replaced by the mac
address-table aging-time command.

Cisco Catalyst 2950 Specifications

General

Forwarding Bandwidth	8.8 Gbps
Switching Capacity	13.6 Gbps
Forwarding Rate	6.6 Mpps
Weight	3.6 kg
RAM	16 MB
Flash Memory	8 MB
Operating Humidity	10% to 85% non-condensing
Uplink Ports	2 x 10/100/1000Base-T
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Quality of Service (QoS), VLAN support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicators	system
Operating Temperature	0 to 45°C
Ports	24 x 10/100 Ethernet ports
MAC Address Table Size	8, 192 entries
Power Supply	Internal 100-240V AC, 50-60Hz