Reading LED Indicators B-7
Interface Processor LEDs
The state of each B/A pair of LEDs indicates the status of one type of three possible station
connections: dual attachment station (DAS), single attachment station (SAS), or dual homed. The
states of the FIP LED combinations, and the meanings of each are described and illustrated in
Table B-1.
Figure B-9 FIP LEDs
Table B-1 FIP LED States—Refer to Figure B-9
LED Pattern
1
State Indication
B A DAS Both LEDs off means not connected.
– –
X X
X X
Both LEDs off Not connected
O O
X X
X X
Both LEDs on Through A
O –
X X
X X
B on and A off Wrap B
– O
X X
X X
B off and A on Wrap A
B A SAS
X X
– –
X X
Both LEDs off Not connected
X X
O –
X X
B on and A off
Single attachment B (PHY A shut down)
X X
– O
X X
B off and A on
Single attachment A (PHY B shut down)
B A Dual Homed
H2066
PHY B
PHY A
DAS
SAS
DUAL HOMED
ENABLED
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