3-4
Cisco UCS C420 Server Installation and Service Guide
OL-27640-01
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 on page 3-5 defines the rear-panel LED
states.
Figure 3-2 Rear-Panel LEDs and Buttons
Power supply status • Green—All power supplies are operating normally.
• Amber, steady—One or more power supplies are in a degraded operational state.
• Amber, blinking—One or more power supplies are in a critical fault state.
Network link activity
• Off—The Ethernet link is idle.
• Green—One or more Ethernet LOM ports are link-active.
Table 3-1 Front-Panel LEDs States (continued)
LED Name State
1 Power supply status 6 10-Gb Ethernet link status
(present only if 10-Gb VIC is installed)
2 Power supply fault 7 10-Gb Ethernet link speed
(present only if 10-Gb VIC is installed)
3 10/100/1000 Ethernet link speed 8 1-Gb Ethernet link speed
4 10/100/1000 Ethernet link status 9 1-Gb Ethernet link status
5 System status 10 Rear identification button and LED
PCle 2
PCle 5
PCle 3
PCle 6
PCle 1
PSU 1
PCle 7
PSU 2
3 4 5 8 9
1 2
10
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6 7
