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Chapter 2: Installation
2.9 LED Indicators
LAN Port LEDs
The motherboard's Ethernet ports has two LED indicators. The Activity LED is yellow and
indicates connection and activity. The Link LED may be green, amber, or o to indicate the
speed of the connection. Refer to the tables below for more information.
BMC Hearbeat LED (LEDM1)
A BMC Heartbeat LED is located at LEDM1 on the motherboard. When LEDM1 is blinking,
the BMC is functioning normally. See the table below for more information.
BMC Heartbeat
LED State
Color State Denition
Green Solid On BMC is not ready
Green Blinking BMC Normal
Green Fast Blinking BMC: Initializing
UID Switch and LED Indicator (UID LED & UID-SW)
The rear UID LED is located next to the UID switch. The front UID LED is located on the front
panel. When you press the UID switch, both rear and front UID LED indicators will turn on.
Press the UID switch again to turn o the LED indicators. Use this UID Indicator to 'mark' the
system, so the system can be easily identied whether on the front or back (e.g., a system
rack with multiple units installed).
UID LED
LED Indicator
Color State Denition
Blue Solid On Unit Identied
None O UID O
Link LED
Connection Link Speed Indicator
LED Color Denition
None 10 Mb/s
Green 100 Mb/s
Amber 1 Gb/s
Activity LED
Color State Denition
None No Connection
Yellow Solid On Link
Yellow Flashing Active
Activity LEDLink LED
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