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Placing Units On Top of Each Other
27
Placing Units On 
Top of Each Other
If the Switch units are free-standing, up to eight units can be placed one 
on top of the other. If you are mixing a variety of SuperStack
®
 3 Switch 
and Hub units, the smaller units must be positioned at the top.
If you are placing Switch units one on top of the other, you must use the 
self-adhesive rubber pads supplied. Apply the pads to the underside of 
each Switch, sticking one in the marked area at each corner. Place the 
Switch units on top of each other, ensuring that the pads of the upper 
unit line up with the recesses of the lower unit.
Stacking Units
Switch 4400 units can be stacked together and then treated as a single 
manageable unit with one IP address. Any combination of 24-port and 
48-port units is allowed in a single stack.
The SuperStack 3 Switch 4400 SE can only be stacked with non-SE 
Switches if it has been upgraded using the Switch 4400 SE Enhanced 
Software Upgrade (3C17207). An upgraded Switch 4400 SE cannot be 
stacked with a normal Switch 4400 SE.
How To Stack Units
To stack two Switch 4400 units you will need to order the SuperStack 3 
Switch Cascade Stacking Kit (3C17227). The kit consists of two Cascade 
Modules and a Cascade Cable. Both Switches must have an unused 
expansion slot to allow a Cascade Module to be fitted.
Figure 7   Stacking two Switch 4400 units
To stack more than two Switch units you will need to order one 
SuperStack 3 Cascade Extender Kit (3C17228) for each additional unit. 
This Kit consists of one Cascade Module, one Cascade Cable and one 
SuperStack 3 Cascade Module
3C17224
SuperStack 3 Cascade Module
3C17224
DOW
N
UP
Switch 1
Switch 2
Module 2
Module 2
DUA1720-3AAA07.book  Page 27  Wednesday, March 17, 2004  1:14 PM