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Hub to
Management Unit
You can connect the hub (or a hub stack) to a Management Unit by using
the expansion cable. Connect the UP expansion port on the hub's rear panel
to the DOWN expansion port on the Management Unit's rear panel, as
shown in Figure 3-5.
3Com strongly recommends that you place the Management Unit on top of
the hub stack, so it will be unit number 1. This will ensure that existing
nonvolatile port configuration information is applied to the correct physical
unit in the stack.
Management
Unit
RE FE
INS TR
R TO
UC TIO
N MA
FO R CO
NU AL
RR EC
SE LE
CT ION
T
PO WE
OF
!
R CO
RD
C AU
pr ot
TI O
N : Fo
3C om
ec tio
us e
n ag
r co
Co rp or
on ly
nt in ue
Sa nt a
an d
ai ns
at io n
ra tin
w ith
t ris k
d
®
Cl ar a,
sa m
M ad e
g of
e ty pe
of fir
CA
an ti-
e
in US A
se rg
e fu
se .
D C IN
P U T
IN PU T
V
5
+1 2
A m ax
–1 2
RE FE
5. 0
INS TR
R TO
UC TIO
2. 5
N MA
FO R CO
0. 2
NU AL
SE LE
RR EC
CT ION
T
PO WE
OF
!
R CO
RD
C AU
TI O
pr ot
N : Fo
3C om
ec tio
us e
n ag
r co
Co rp or
on ly
nt in ue
Sa nt a
an d
ai ns
at io n
w ith
t ris k
d
®
Cl ar a,
ra tin
sa m
M ad e
g of
of fir
CA
e ty pe
e
in US A
an ti-
se rg
e fu
se .
D C IN
P U T
IN PU T
V
5
A m ax
+1 2
–1 2
5. 0
RE FE
INS TR
R TO
2. 5
UC TIO
0. 2
FO R CO
N MA
NU AL
SE LE
RR EC
CT ION
T
PO WE
OF
!
R CO
RD
C AU
TI O
pr ot
N : Fo
3C om
ec tio
us e
n ag
r co
Co rp or
on ly
nt in ue
Sa nt a
an d
ai ns
at io n
w ith
t ris k
d
®
Cl ar a,
ra tin
sa m
M ad e
g of
of fir
CA
e ty pe
e
in US A
an ti-
se rg
e fu
se .
D C IN
P U T
IN PU T
V
5
A m ax
+1 2
–1 2
5. 0
RE FE
INS TR
R TO
2. 5
UC TIO
0. 2
FO R CO
N MA
NU AL
SE LE
RR EC
T
CT ION
PO WE
OF
!
R CO
RD
C AU
TI O
pr ot
N : Fo
ec tio
3C om
us e
r co
Co rp or
on ly
n ag
nt in ue
an d
ai ns
Sa nt a
w ith
t ris k
d
®
Cl ar a,
at io n
ra tin
sa m
g of
of fir
M ad e
CA
e ty pe
e
in US A
an ti-
se rg
e fu
se .
D C IN
P U T
IN PU T
V
5
A m ax
+1 2
–1 2
5. 0
RE FE
INS TR
R TO
2. 5
UC TIO
0. 2
FO R CO
N MA
NU AL
SE LE
RR EC
T
CT ION
PO WE
OF
!
R CO
RD
C AU
TI O
pr ot
N : Fo
ec tio
3C om
us e
r co
n ag
nt in ue
Co rp or
an d
on ly
ai ns
Sa nt a
w ith
t ris k
d
®
at io n
ra tin
Cl ar a,
g of
sa m
of fir
M ad e
e ty pe
e
in US A
CA
an ti-
se rg
e fu
se .
D C IN
P U T
IN PU T
V
5
A m ax
+1 2
–1 2
5. 0
2. 5
0. 2
Figure 3-5 Connecting a Hub Stack to a Management Unit
The maximum number of units in a stack is eight including the
Management Unit. If you wish, you can add two Redundant Power Systems
to a stack of eight units (seven hubs and one Management Unit, or eight
hubs with no other device).
Making Network Connections
U P
E X P A
D o w n
N S IO N
U P
D
E
E X P A
D O W N
N S IO N
U P
D
E
E X P A
D O W N
N S IO N
U P
D
E
E X P A
D O W N
N S IO N
U P
D
E
E X P A
D O W N
N S IO N
3-5
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