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Cisco ASR 901 10G Series Aggregation Services Router Hardware Installation Guide
OL-28105-02
Appendix A Troubleshooting
Reading the LEDs
RJ-45 Ethernet Interface LEDs
Table A-8 summarizes the LEDs on the RJ-45 Ethernet interface.
Table A-8 100/1000 Ethernet Port LEDs
LED Color/State Description (two LEDs for each 100/1000 Ethernet port)
100/1000 RJ-45 link
(labeled L, left LED)
Solid Green Link with no activity
Flash Green Link with activity
Off No link detected
100/1000 RJ-45 speed
(labeled S, right LED)
Green Speed 1000
Yellow Speed 100
Off Off