Configuring Stand-alone Parameters
                                            Parameters that are not contained in a table are referred to as stand-alone parameters. 
                                            
                                                
                                                
                                                
                                                
                                                    |  | ■ | If you change the value of a parameter (before clicking Apply), the parameter's field is highlighted, as shown in the example below: | 
                                            
                                            
                                                 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | ■ | If you change the value of a parameter from its default value and then click Apply, a dot appears next to the parameter's field, as shown in the example below: | 
                                            
                                            
                                                 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | ■ | If you change the value of a parameter that is displayed with a lightning-bolt  icon (as shown in the example below), you must save your settings to flash memory with a device restart for your changes to take effect. When you change such a parameter and then click Apply, the Restart button on the toolbar is encircled by a red border. If you click the button, the Maintenance Actions page opens, which provides commands for doing this (see Basic Maintenance). | 
                                            
                                            
                                                 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | ■ | Typically required parameters are displayed in bold font. | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | ■ | If you enter an invalid value for a parameter and then click Apply, a message box appears notifying you of the invalid value. Click OK to close the message. The parameter reverts to its previous value and the field is surrounded by a colored border, as shown in the figure below: | 
                                            
                                            
                                                 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | ■ | To get help on a parameter, simply hover your mouse over the parameter's field and a pop-up help appears, displaying a brief description of the parameter. | 
                                            
                                            The following procedure describes how to configure stand-alone parameters.
                                            
                                                
                                                
                                                
                                                
                                                    |  | ➢ | To configure a stand-alone parameter: | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | 1. | Modify the parameter's value as desired. | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | 2. | Click Apply; the changes are saved to the device's volatile memory (RAM). | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | 3. | Save the changes to the device's non-volatile memory (flash): | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | ● | If a device restart is not required: | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | i. | On the toolbar, click Save; a confirmation message box appears: | 
                                            
                                            
                                                 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | ii. | Click Yes to confirm; the changes are save to flash memory. | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | ● | If a device restart is required: | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | i. | On the toolbar, click Restart; the Maintenance Actions page opens. | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | ii. | Click Restart; the device saves the changes to flash memory and then restarts. | 
                                            
                                            
                                                When you click Apply, your changes are saved only to the device's volatile memory and thus, revert to their previous settings if the device later undergoes a hardware reset, a software restart (without saving to flash) or powers down. Therefore, make sure that you save your configuration to the device's flash memory.