3-5
Cisco UCS C420 Server Installation and Service Guide
OL-27640-01
Chapter 3 Maintaining the Server
Status LEDs and Buttons
Table 3-2 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.
