Dynamic mac address
A dynamic MAC address is a MAC address that a switch learns automatically from received frames and removes through aging.
Acing the CCNA Exam: Volume 2 Advanced Networking and Security
A dynamic MAC address is a MAC address that a switch learns automatically from received frames and can remove through aging.
- How it is used
- Explains automatic switch learning, table maintenance, and Port Security behavior for device addresses.
- How deep it goes
- Details learning, persistence, aging types, limits, and Cisco IOS verification, stopping short of frame-forwarding internals.
- Examples
- Uses access-port commands, port-security verification output, SecureDynamic entries, and five-minute absolute or inactivity aging.
- What you can do after
- Operate and verify dynamically learned secure MAC addresses, then configure their limits and aging behavior.
Acing the CCNA Exam: Volume 1 Fundamentals and Protocols
A dynamic MAC address is a MAC address learned automatically by a switch from received frame source information.
- How it is used
- Explains how switches build forwarding knowledge automatically from received frame source addresses.
- How deep it goes
- Defines learning, port association, five-minute aging, viewing, and clearing, while deferring other switching and ARP details.
- Examples
- Uses a two-switch, four-PC topology with learned port mappings as the concrete example.
- What you can do after
- Operate and inspect Cisco switching behavior with show mac address-table and clear mac address-table dynamic.
Read how Acing the CCNA Exam: Volume 1 Fundamentals and Protocols explains dynamic mac address →
Related concepts
- secure mac addresskind of · A secure MAC address is a MAC address authorized by port security to send traffic through a particular switch port.
- mac addresskind of · A MAC address is a link-layer identifier assigned to a network interface for communication over a local network link.
- mac agingaddressed by · MAC address learning is the process by which a network switch associates source MAC addresses with the ports where frames arrive.
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