Allied Telesis AT-8024 Installation Manual page 36

Product Description
36
You must specify the static MAC addresses of the nodes whose frames
the switch should forward. The switch will forward frames only from
those nodes whose MAC addresses you enter in the static MAC address
table. Any node whose MAC address is not in the static MAC address
table will not be able to send frames through the switch.
Lock All Ports
This security level causes the switch to immediately stop learning new
dynamic MAC addresses. The switch forwards frames based on the
dynamic MAC addresses that it has already learned and any static MAC
addresses that the network administrator has entered.