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Chapter 4: Motherboard Connections
Unit ID LED
A rear unit identifier (UID) indicator at LED1 is located near the UID switch on the I/O back
panel. It provides easy identification of a unit that may need service.
Onboard Power LED
The Onboard Power LED is LE2. When this LED is on, the system power is on.
BMC Heartbeat LED
LEDM1 is the BMC heartbeat LED. When the LED is blinking green, BMC is functioning
normally.
4.5 LED Indicators
Network LAN LEDs
The Ethernet ports each have two LEDs. One LED indicates activity when flashing green.
The other may be green, amber or off to indicate the speed of the connection.
Speeds
are
noted in Chapter 1.
BMC Dedicated LAN LEDs
A dedicated BMC LAN port is also included on the motherboard. The amber LED on the right
of the BMC LAN port indicates activity, while the LED color on the left indicates the speed
of the connection.
BMC Link LED
Color
Definition
Off
No Connection
Green
100 Mb/s
Amber
1 Gb/s
IPMI LAN
Link LED
(speed)
Activity LED
