Network Module LEDs
Figure 7: Network Module LEDs
G3 LED3G1 LED1
G4 LED4G2 LED2
Network Module Link StatusColor
Link is off.Off
Link is on; no activity.Green
Activity on a link; no faults.
The LED will blink green even when there is very little control traffic.Note
Blinking green
Link is off due to a fault or because it has exceeded a limit set in the switch software.
Link faults occur when noncompliant cabling is connected to an SFP/SFP+
port. Use only standard-compliant cabling to connect to Cisco SFP/SFP+ ports.
You must remove from the network any cable or device that causes a link fault.
Caution
Blinking amber
Link for the SFP/SFP+ has been disabled.Amber
Catalyst 3850 Switch Hardware Installation Guide
6 OL-26779-05
Installing a Network Module
Network Module LEDs
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