D-Link DGS-1520 User Manual - Page 113

DGS-1520 Series Gigabit Ethernet Smart Managed Switch Web UI Reference Guide If the Primary Master is removed, the Backup Master will assume the Primary Master's role and a new Backup Master will be chosen using the election process. Switches in the stack will clear the configuration of the unit removed, and dynamically learned databases, such as ARP, will also be cleared. The new Primary Master will inherit the MAC and IP address of the previous Primary Master to avoid conflict within the stack and the network itself. If both the Primary Master and the Backup Master are removed, the election process is immediately initiated, and a new Primary Master and Backup Master are elected. Switches in the stack will clear the configuration of the units that have been removed, and dynamically learned databases, such as ARP, will also be cleared. Static Switch configuration still remains in the database of the remaining Switches in the stack and those functions will not be affected. NOTE: If there is a Box ID conflict when the stack is in the discovery phase, the device will enter a special standalone topology mode. Users can only get device information, configure Box IDs, save and reboot. All stacking ports will be disabled and an error message will be produced on the local console port of each device in the stack. Users must reconfigure Box IDs and reboot the stack to rectify the problem. Physical Stacking This window is used to display and configure the physical stacking settings. To view the following window, click Management > Stacking > Physical Stacking, as shown below: Figure 4-90 Physical Stacking Window The fields that can be configured in Physical Stacking are described below: Parameter Stacking Mode Stack Preempt Description Select this option to enable or disable the stacking mode. Select this option to enable or disable preemption of the master role when a unit with a higher priority is added to the Switch. 103