Which command can be used to set the aging time of entries in the MAC address table?
- address-table [time] aging-time
- mac address-table aging-time [time]
- mac aging-time [time]
- address-table aging-time [time]
- mac address-table [time] aging-time
Explanation: The mac address-table aging-time command is the standard global configuration command used to set the duration that a dynamically learned entry remains in the switch's MAC address table before being removed due to inactivity. By default, most Cisco Catalyst switches utilize an aging timer of 300 seconds, but administrators can modify this value to optimize how the switch manages its Content-Addressable Memory (CAM) table. Reducing the aging time can help clear out stale entries more quickly in highly dynamic environments, while increasing it can prevent excessive unknown unicast flooding by keeping addresses in the table for longer periods. While the show mac address-table command is primarily used for verification and troubleshooting, the aging-time configuration is essential for maintaining the overall efficiency and accuracy of the Layer 2 forwarding database.
Related exam: Modules 1 – 7: Checkpoint Exam: Network Switching Answers (CCNP ENCOR v9)
