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Placing Units On Top of Each Other 23
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 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
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.
Power/
Self Test
Alert
21
91022
11
23 12 24
8
20
1
13
197
18
6
17
5
16
4
153
14
2
26 / Down
25 / Up
1
2
3
4
Unit
Power/
Self Test
Alert
21
91022
11
23 12 24
8
20
1
13
197
18
6
17
5
16
4
153
14
2
26 / Down
25 / Up
1
2
3
4
Unit
3C17304A Superstack3Switch 4200 28-Port
Power/
Self Test
Alert
21
91022
11
23 12 24
8
20
1
13
197
18
6
17
5
16
4
153
14
2
26 / Down
25 / Up
1
2
3
4
Unit
3C17302A Superstack3 Switch 420050-Port
8
32
1
25
31
7
30
6295
28
427
3
26
2
49
50
16
40
9
33
39
15
38
14
37
13361235
11
34
10
24
48
17
41
47
23462245
21
44
20
43
19
42
18
Up
Down
Alert
Power/
Self Test
Unit
1
2
3
4
27
28
27
28
27
28
27
28
3C17304A Superstack3 Switch 420028-Port
3C17300A Superstack3 Switch 420026-Port
DUA1730-0AAA03.book Page 23 Thursday, November 17, 2005 12:17 PM