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Catalyst 3850 Switch Hardware Installation Guide
OL-26779-02
Chapter 1 Product Overview
Front Panel
Network Module LEDs
Figure 1-6 Network Module LEDs
1 G1 LED 3 G3 LED
2 G2 LED 4 G4 LED
Table 1-11 Network Module LEDs
Color Network Module Link Status
Off Link is off.
Green Link is on; no activity.
Blinking green Activity on a link; no faults.
Note The LED will blink green even when there is very little
control traffic.
Blinking amber Link is off due to a fault or because it has exceeded a limit set in the
switch software.
Caution Link faults occur when noncompliant cabling is
connected to an SFP or SFP+ port. Use only
standard-compliant cabling to connect to Cisco SFP and
SFP+ ports. You must remove from the network any cable
or device that causes a link fault.
Amber Link for the SFP or SFP+ has been disabled.
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C3850-NM-4-1G
Catalyst 3850 48 PoE+