26 C
HAPTER
 2: I
NSTALLING
 
THE
 S
WITCH
Stacking Units
Units in the Switch 1100/3300 family can be stacked together and then 
treated as a single manageable unit with one IP address.
You can stack Switch units together in two ways:
■
The matrix port on the rear of the Switch allows you to connect two 
Switch units back-to-back. For this you need a Matrix Cable (part 
number 3C16965). Contact your supplier for details.
■
The Expansion Module slot at the rear of a Switch 1100/3300 allows 
you to install a Matrix Module (part number 3C16960). The Matrix 
Module provides four ports and allows you to interconnect up to four 
Switch units using Matrix Cables.
Stacking Two Units
You can stack two Switch units with a single Matrix Cable. To do this:
1
Power-off both units.
2
Arrange the units as required. They can be rack-mounted or 
free-standing; if you choose to have them free-standing, remember to 
position the rubber feet as detailed in “Placing Units On Top of Each 
Other” on page 25. When positioning the units, note that Matrix Cables 
are 1m (3.28ft) long.
3
As shown in Figure 8, connect one end of the Matrix Cable to the matrix 
port of the top Switch, and the other end to the matrix port of the lower 
Switch
4
If you use the management software of the units:
■
Ensure that both units have the same version of management 
software
■
Ensure that you re-configure the stack-wide features on both units
For more information about management software, see “Managing the 
Switch” on page 32.
16985ua.bk  Page 26  Friday, July 23, 1999  2:39 PM