Dell PowerConnect 55xx Systems User Guide 492 Turn on the unit to begin auto boot and press Return or Esc to abort andenter the Start Up menu.3 Select Stack Menu to open the Stack Menu.4 Select Set Unit Stack ID. Enter either a Unit ID for manual assignment or0 to indicate that the unit ID will be assigned automatically.NOTE: The entire stack should be connected, as shown in Figure 6-1, beforepowering up the units.Selecting the Master and Master Backup UnitsA unit is master-enabled if it assigned Unit ID 1 and Unit 2. All other units inthe stack (slaves) have unit IDs of 3-8.The stack master assignment is performed during the configuration bootprocess. One master-enabled stack member is elected as Master, and theother master-enabled stack member is selected as Master Backup , accordingto the following decision process:• A master is selected from the set of the two Master-enabled units. Priorityis given to the lowest unit ID, but also takes into account the amount oftime the unit is UP (Up Time) as follows:Startup Menu[1]Download Software[2]Erase Flash File[3]Password Recovery Procedure[4]Set Terminal Baud-Rate[5]Stack Menu[6]Back[1]Show Unit Stack ID[2]Set Unit Stack ID[3]Back
