TP-Link AC50 Configuration Manual page 10

The wireless controller's configuration files fall into two types: the running configuration file
and the start-up configuration file. After you perform configurations on the sub-interfaces
and click Save, the modifications will be saved in the running configuration file. However,
the configurations will be lost when the device reboots.
If you need to keep the configurations even if the device reboots, please use the function
to save the configurations in the start-up configuration file. Click Save Config on the top-
right of the interface, especially before you power off or reboot the device.
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