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Cisco UCS C22 Server Installation and Service Guide
OL-26646-01
Chapter 3      Maintaining the Server
Status LEDs and Buttons
Rear Panel LEDs and Buttons
Figure 3-2 shows the rear panel LEDs and buttons. Table 3-2 defines the LED states.
Figure 3-2 Rear Panel LEDs and Buttons
1 Power supply fault LED 5 10/100/1000 Ethernet dedicated management 
link status LED
2 Power supply AC OK LED 6 10/100/1000 Ethernet dedicated management 
link speed LED
3 1-Gb Ethernet link speed LED 7 Rear Identification button/LED
4 1-Gb Ethernet link status LED –
Ta b l e  3-2 Rear Panel LEDs, Definitions of States 
LED Name State
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, solid—A critical fault threshold has been reached, causing the power 
supply to shut down (for example, a fan failure or an over-temperature condition).
Power supply AC OK   • Off—There is no AC power to the power supply.
  • Green, blinking—AC power OK, DC output not enabled.
  • Green, solid—AC power OK, DC outputs OK.
1-Gb Ethernet link speed   • Off—link speed is 10 Mbps.
  • Amber—link speed is 100 Mbps.
  • Green—link speed is 1 Gbps.
1-Gb Ethernet link status   • Off—No link is present.
  • Green—Link is active.
  • Green, blinking—Traffic is present on the active link.
10/100/1000 Ethernet dedicated 
management link speed
  • Off—link speed is 10 Mbps.
  • Amber—link speed is 100 Mbps.
  • Green—link speed is 1 Gbps.
285202
PSU 1
PCIe 2 PCIe 1
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5 7
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