Install Guide

Figure 13. S4148U-ON switch I/O-side LEDs
1. Unified QSFP28 and QSFP+ port LEDs—Link (right),
activity (left)
2. Unified SFP+ and SFP+ port LEDs—Link (right), activity
(left)
3. Master LED 4. System LED
5. Power LED 6. Fan LED
7. Locator LED/System beacon 8. Stack ID
Figure 14. S4100-ON Series PSU-side LEDs
1.
Fan LED 2. Link LED
3. PSU LED 4. Activity LED
Table 5. S4100–ON Series LED behavior
LED Description
System Status/Health LED
● Solid green—Normal operation
● Blinking green—Booting
● Solid yellow (amber)—Critical system error
● Blinking yellow—Noncritical system error, fan failure, or
power supply failure
Power LED
● Off—No power
● Solid green—Normal operation
● Solid yellow—POST is in process
● Blinking yellow—Power Supply failure
Master LED
● Off—Switch is in Stacking Slave mode
● Solid green—Switch is in Stacking Master or Standalone
mode
FAN LED
● Off—No power
14 S4100–ON Series switch