Stacking S-Series Switches | 1029Figure 50-11. Stacking Cable RedundancyLED Status Indicators on an S-Series StackThe stack unit is displayed in an LED panel on the front of each switch. Each panel displays the stack unitID — from 0 through 7 — and:• A for the management unit• Bfor the standby management unit• 0 for stack membersAdd a Unit to an S-Series StackIf you are adding units to a stack, you can either:• allow FTOS to automatically assign the new unit a position in the stack, or• manually determine each units position in the stack by configuring each unit to correspond with thestack before connecting itThree configurable system variables affect how a new unit joins a stack: priority, stack number, andprovision.• Depending on which has the higher priority, either the standalone unit or the entire stack reloads(excluding the new unit). If the new unit has the higher priority, it becomes the new stack manager andthe stack reloads, as shown in Figure 50-3, Figure 50-4, Figure 50-5, and Figure 50-6.• If you add a unit that has a stack number that conflicts with the stack, the stack assigns the firstavailable stack number, as shown in Figure 50-12 and Figure 50-13.• If the stack has a provision for the stack-number that will be assigned to the new unit, the provisionmust match the unit type, or FTOS generates a type mismatch error, as show in Figure 50-14 andFigure 50-15.After the new unit loads, it synchronizes its running and startup configurations with the stack.Stacking 002A BA BA BStacking Cable Redundancy
