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174 Chapter 4 Troubleshooting
209418-A
Figure 78 LED display pane
l
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 11131517192123
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