Saving Configuration
When you configure parameters and tables in the Web interface and then click the Apply button, changes are saved to the device's volatile memory (RAM). These changes revert to their previous settings when the device restarts (hardware or software) or powers off. Therefore, to ensure that your configuration changes are retained, you must save them to the device's non-volatile memory (i.e., flash memory).
To save your settings to flash, click the Save button located on the toolbar. To remind you to save your settings to flash, the Save button is displayed with a red border, as shown below:
To save configuration to flash through CLI, use the following command:
# write