3Com 3 manual Placing Units On, Top of Each Other, Stacking Units

Placing Units On Top of Each Other 23

Placing Units On	If the Switch units are free-standing, up to eight units can be placed one
Top of Each Other	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 feet 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 feet of the upper unit
	line up with the recesses of the lower unit.
Stacking Units	Up to four Switch 4200 Family units can be stacked together and then
	treated as a single manageable unit with one IP address. Any
	combination of Switch 4200 Family units is allowed in a single stack. The
	units are connected together via the 10/100/1000BASE-T ports on the
	front of the unit as shown in Figure 6. Starting from the base of the stack,
	the port marked with ‘up’ is connected to the port marked with ‘down’
	on the unit above. Cable lengths of between 14 cm (5.5 in) and
	100 m (328 ft) can be used for stacking.
	Figure 6 Stacking example

																																						3C17302A Superstack 3 Switch 4200 50-Port
1	25	2	26	3	27	4	28	5	29	6	30	7	31	8	32	9	33	10	34	11	35	12	36	13	37	14	38	15	39	16	40	17	41	18	42	19	43	20	44	21 45	22 46	23 47	24	48	Power/
																																													Self Test
																																												1
																																												2
																																												3	Alert	Up
																																												4	Unit
																																														49

Down

50

1 13 2 14 3 15 4 16 5 17 6 18 7 19 8 20 9 21 10 22 11 23 12 24

3C17304A Superstack 3 Switch 4200 28-Port

	Power/			27
	Self Test
1		25 / Up	26 / Down	27	28
2
3	Alert
4	Unit			28

1 13 2 14 3 15 4 16 5 17 6 18 7 19 8 20 9 21 10 22 11 23 12 24

3C17304A Superstack 3 Switch 4200 28-Port

	Power/	27
	Self Test	27	28
1	25 / Up	26 / Down
2
3	Alert	28
4
	Unit

1 13 2 14 3 15 4 16 5 17 6 18 7 19 8 20 9 21 10 22 11 23 12 24

3C17300A Superstack 3 Switch 4200 26-Port

	Power/
	Self Test
1	25 / Up 26 / Down
2
3	Alert
4	Unit

The unit LEDs will display the unit number in the stack, from 1 at the bottom to 4 at the top.

3Com recommends that when you add a new unit to a stack, you should first initialize it to factory default settings.

Any Switch 4200 unit can be added to the stack, including the Switch 4226T, the Switch 4250T and the Switch 4228G. You must install the latest software version on all units in the stack.