RJ-45 LEDs
Each RJ-45 port has two LED indicators. Left LED indicates the Link status; right LED indicates the status
of the duplex LED.
Table 19: RJ-45 LED Indication
IndicationLED StateLED
Link up in 10/100/1000Base-TGreenLeft
Activity in 10/100/1000Base-TBlinking
Green
Fault/Error/Link downYellow
Administratively downOff
Link up in full duplex
GreenRight
Link up in half duplexOff
Power Supply Unit LEDs
Each power supply unit has a corresponding LED on the front panel.
Table 20: PSU LED Indication
IndicationLED
State
LED
Power Supply is working and 12V output is alright.GreenOK
12V output failure (Either input not present or fault in the power supply unit).Red
SystemāInterface LED Behavior
Table 21: 1G Copper and 1G SFP LED Indication
1G SFP Port LEDs1G Copper Port LEDs (Link/Duplex)Event
OffOff/OffROMMON
OffOff/OffIOS Shut
YellowYellow/OffIOS No shut (cable disconnect)
OffGreen/GreenIOS No shut (cable connect) (media-type RJ-45)
GreenOff/OffIOS No shut (cable connect) (media-type SFP)
GreenOff/OffIOS No shut (cable connect) (media-type auto)
Cisco ASR-920-20SZ-M Aggregation Services Router Hardware Installation Guide
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Troubleshooting Aids
RJ-45 LEDs