3-5
Cisco UCS C420 Server Installation and Service Guide
OL-27640-01
Chapter3 Maintaining the Server
Status LEDs and Buttons
Table3-2 Rear-Panel LED States
LED Name State
Power supply status •Green, steady—The power supply is operating normally and supplying AC power
to the server.
•Green, blinking—The power supply is off and in cold-redundancy mode.
Power supply fault •Off—The power supply is operating normally.
•Amber, blinking—An event warning threshold has been reached, but the power
supply continues to operate.
•Amber, steady—A critical fault threshold has been reached, causing the power
supply to shut down.
10/100/1000 Ethernet link speed •Off—Link speed is 10 Mbps.
•Green—Link speed is 100 Mbps.
10/100/1000 Ethernet link status •Off—No link is present.
•Green—Link is active.
•Green, blinking—Traffic is present on the active link.
System status •Green—The server is running in normal operating condition.
•Green, blinking—The server is performing system initialization and memory
check.
•Amber, steady—The server is in a degraded operational state. For example:
–
Power supply redundancy is lost.
–
CPUs are mismatched.
–
At least one CPU is faulty.
–
At least one DIMM is faulty.
–
At least one drive in a RAID configuration failed.
•Amber, blinking—The server is in a critical fault state. For example:
–
Boot failed.
–
Fatal CPU and/or bus error is detected.
–
Server is in an over-temperature condition.
10-Gb Ethernet link speed •Off—Link speed is 10 Mbps.
•Green—Link speed is 10 Gbps.
10-Gb Ethernet link status •Off—No link is present.
•Green—Link is active.
•Green, blinking—Traffic is present on the active link.
1-Gb Ethernet link speed •Off—Link speed is 10 Mbps.
•Amber—Link speed is 100 Mbps.
•Green—Link speed is 1 Gbps.