D-Link DGS-3308TG User Manual page 148

The reboot options are as follows:
Reboot simply restarts the switch. Any configuration settings not saved using Save Changes from the Main
Menu will be lost. The Switch's configuration will be restored to the last configuration saved in NV-RAM.
Save Configuration & Reboot saves the configuration to NV-RAM (identical to using Save Changes) and
then restarts the switch.
Reboot & Load Factory Default Configuration restarts the switch using the default factory configuration.
All configuration data will be lost. This is identical to using Factory Reset and then Reboot.
Reboot & Load Factory Default Configuration Except IP Address restarts the switch using the default
factory configuration, except the user configured IP address will be retained. All other configuration data will be lost.
A confirmation screen will appear:
Figure 6-92. Reboot menu
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8-port Gigabit Ethernet Switch User's Guide