C o n f i g u r a t i o n 992 Type “E” to enable spanning tree globally, or “D” to disable it globally.The IAD saves, then displays the Bridge Configuration menu.3 Continue with other tasks, or press Escape to return to the Main menu.Enable/Disable Spanning Tree by PortTo enable or disable Spanning Tree by port, follow the steps below.1 On the Bridge Configuration menu (Figure 4.61), type “O” to selectEnable/Disable Spanning Tree by Port. The IAD displays the interfacesavailable on this IAD as shown in Figure 4.522 Type the number of the interface for which you want to enable SpanningTree. The IAD displays a port table. If more than one interface is configuredon the selected port, the IAD displays a list of interfaces.3 Type the number of the port. The IAD displays the status of this interfaceand port and prompts you to enable or disable Spanning tree for thatinterface and port.4 Type “E” to enable Spanning Tree on this port, or “D” to disable it. TheIAD saves the new configuration then displays the Bridge Configuration(Figure 4.61) menu.5 Repeat these steps for each port you want to enable or disable SpanningTree.Configure Spanning Tree Bridge PriorityThe Spanning Tree algorithm selects the bridge with the lowest priority on thenetwork as the Root Bridge.To set the Spanning Tree bridge priority (a value between 1 and 65,565 −default 32,768), follow the steps below.1 Type “R” on the Bridge Configuration menu to select Configure SpanningTree Bridge Priority. The IAD displays a prompt for you to enter thepriority.2 Type the priority and press Enter. The IAD updates the configuration.3 Press any key to display the Bridge Configuration menu (Figure 4.61).4 Continue with other configuration tasks or Escape to return to the Mainmenu.Configure Spanning Tree Port PriorityThe spanning tree algorithm uses the spanning tree bridge priority todetermine which bridge to use as the Ethernet LAN destination when two ormore bridges are bridging between the same LAN.To set the Spanning Tree priority by port (range 0 to 255 − default 128, thelower the value, the higher the priority), follow the steps below.
