Milan Technology MIL-SM8002TG - Manual (Page 172)

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7. Click Apply .
802.1x Misc Configuration interface
Port Security
Use the MAC address to ensure the port security.
Static MAC Address
You can add a static MAC address; it remains in the switch's address table, regardless of
whether the device is physically connected to the switch. This saves the switch from
having to re-learn a device's MAC address when the disconnected or powered-off device
is active on the network again. You can add / modify / delete a static MAC address.