3Com DUA1698 manual Stacking Units, 3C16965. Contact your supplier for details

26CHAPTER 2: INSTALLING THE SWITCH

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.
	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 Switches in a stack are numbered 1 to 4, from the bottom up, for
	management purposes. The SuperStack 3 Switch 3300 MM will always
	be identified as Unit 1 and should therefore be positioned at the bottom
	of the stack.

Stacking Two Units You can stack two Switch units with a single Matrix Cable. To do this:

1Power-off both units.

2Arrange 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.

3Connect 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 (See Figure 8).

4If 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.