Cisco MAC Address Port Security
We are going to configure basic, no frills, port security on the Cisco Catalyst 2960. From Understanding Port Security – Chapter 62 – Configuring Port Security
You can use port security with dynamically learned and static MAC addresses to restrict a port’s ingress traffic by limiting the MAC addresses that are allowed to send traffic into the port. When you assign secure MAC addresses to a secure port, the port does not forward ingress traffic that has source addresses outside the group of defined addresses. If you limit the number of secure MAC addresses to one and assign a single secure MAC address, the device attached to that port has the full bandwidth of the port.