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Troubleshooting
Troubleshooting
suggestions
Table 2 provides suggestions for troubleshooting your hub.
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LED Action Cause Solution
Col Blinkin
g
Normal data
collisions on the
network.
No action is necessar
y
.
Col
Blinkin
g
excessivel
y
Data collisions
are occurrin
g
because of a
hi
g
h volume of
traffic on the
network.
Make sure connected
devices are not
o
p
eratin
g
in full-
du
p
lex mode; the
y
must o
p
erate in half-
du
p
lex mode.
Se
g
ment the network
with an Ethernet
switch.
Cables used to
connect to the
network are
defective or of
the wron
g
t
yp
e.
Ve ri f
y
that the cable is
of the correct t
yp
e. See
“Communication
cables” on
p
a
g
e4 for
more information.
Link/
Traffic
Off
(even with
a cable
attached)
Successful link
is not bein
g
detected b
y
the
p
ort.
Ve ri f
y
that the hub and
the connected device
are
p
owered.
Ve ri f
y
that the cable is
of the correct t
yp
e. See
“Communication
cables” on
p
a
g
e4 for
more information.
Ins
p
ect cables for
dama
g
e, cable
p
airs to
see if the
y
are wired
correctl
y
, and
connectors to see if
the
y
are loose.
Table 2: Suggestions for Troubleshooting