50 Dell PowerConnect 55xx Systems User Guide
FILE LOCATION:  C:\Users\gina\Desktop\Checkout_new\Maintenance Projects\Dell 
Contax\CxUGStacking.fm
DELL CONFIDENTIAL – PRELIMINARY 9/11/12 - FOR PROOF ONLY
• Loading Software onto Stack Members
• Rebooting the Stack
• Managing Configuration Files on the Stack
Adding a Unit to the Stack
The recommended procedure to add a unit to a stack is as follows:
1
Place the powered-off unit in its physical place in the stack, and insert the 
stacking link in the unit (but do not connect it to the rest of the stack).
2
Power up the unit, and set the correct Unit ID, as described below. 
3
Reboot the unit and connect it to the rest of the stack through the stack 
link.
Assigning Unit IDs 
Each unit in the stack has a unique ID that defines the unit’s position and 
function in the stack, as shown in Figure 3-2. 
The unit that is assigned Unit ID 1 is the Master unit, by default. The unit 
that is assigned Unit ID 2 is the Master Backup unit.
When you power-up the stack, each unit is assigned a unique Unit ID. This is 
displayed on the front panel of the unit, as shown in Figure 3-2.
The Unit ID of each unit can be either automatically assigned or manually 
assigned, as described in step 1 to step 4 below.
To assign IDs to the units in the stack, do the following for each unit in the 
stack:
1
Connect the unit to the terminal.