
174
Chapter 4 Troubleshooting
209418-A
Figure 78
LED display panel
Table 42
BayStack 420 Switch LED descriptions
Label
Type
Color
State
Meaning
Power
On
Power status
Green
On
DC power is available to the switch’s internal circuitry.
Off
No AC power to switch or power supply failed.
Cascade
Up
Stack mode
Off
The switch is in standalone mode.
Green
On
The switch is connected to the
upstream
unit’.
Cascade
Down
Stack mode
Off
The switch is in standalone mode.
Green
On
The switch is connected to the
downstream
unit.
Base
Base mode
Green
On
The switch is configured as the stack base unit.
Off
The switch is
not
configured as the stack base unit (or is
in standalone mode).
Amber
Due to a stacking error the unit is unable to maintain the
stack connection.
10/100
Link/
Activity
10/100 Mb/s
port speed
indicator
Green
On
The corresponding port is set to operate at 100 Mb/s, and
the link is good.
Amber
On
The corresponding port is set to operate at 10 Mb/s, and
the link is good.
Off
The link connection is bad, or there is no connection to
this port.
9991EA
1
3
5
7
9
11
13
15
17
19
21
23
2
4
6
8
10
12
14
16
18
20
22
24
10/100 Link Activity
HDX/FDX
12/100 Link Activity
HDX/FDX
Base
Unit Set
BayStack 420-24T Switch
Содержание 1000BASE-LX
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Страница 12: ...12 Contents 209418 A ...
Страница 16: ...16 Figures 209418 A ...
Страница 24: ...24 Preface 209418 A ...
Страница 200: ...200 Appendix D Connectors and pin assignments 209418 A ...
Страница 206: ...206 Appendix E Default settings 209418 A ...
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