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Chapter 4: Motherboard Connections
4.5 LED Indicators
LAN LEDs
Two LAN ports (LAN 1 and LAN 2) are located on the I/O back panel of the motherboard.
Each Ethernet LAN port has two LEDs. The green LED indicates activity, while the other Link
LED may be green, amber, or off to indicate the speed of the connection. Refer to the tables
below for more information.
LAN1/2 Activity LED (Right)
LED State
Color
Status
Definition
Green
Flashing
Active
LAN1/2 Link LED (Left)
LED States
LED Color
Definition
Green
10Gbps
Yellow/Amber
1Gbps
UID LED
LED State
LED Color
Definition
Blue: On
Unit Identified
Unit ID LED
A rear UID LED indicator (UID-LED) is located near the UID switch on the I/O back panel.
This UID indicator provides easy identification of a system unit that may need service.
BMC_LAN LEDs
In addition to LAN1 and LAN2, a BMC LAN is also located on the I/O back panel. The
amber LED on the right indicates activity, while the LED on the left indicates the speed of
the connection. Refer to the table below for more information.
BMC LAN
Activity LED
Link LED
LAN 1/LAN 2
IPMI LAN
(X8ST3-F)
BMC LAN LEDs
LED States
Color/State
Definition
Link (left)
Green: Solid
Amber: Solid
100 Mbps
1Gbps
Activity (Right)
Amber: Blinking
Active
