PoE switch LEDs indicate power status, port activity, link speed, and system health, helping you monitor and troubleshoot your network.

Power and System Status LEDs

• Power (PWR) LED: Green solid indicates the switch is powered on and functioning normally; off means no power or a connection issue; yellow may indicate a backup power supply is active or a power module fault .
• System (SYS) LED: Green flashing shows the system is starting up; green solid means normal operation; red solid indicates a system fault such as fan failure or overheating .

PoE Mode LEDs

• PoE LED on each port: Green solid indicates the port is providing PoE power to a connected device; off means PoE is disabled or not required by the device .
• PoE types: Some switches differentiate between PoE, PoE+, or UPOE, which may be indicated by LED color or mode selection .

Port Status and Activity LEDs

• Link/Speed LED:
  • Solid green: link established and stable.
  • Blinking green: data is actively being transmitted.
  • Amber/orange: slower speed, configuration mismatch, or minor errors.
  • Off: no link detected; check cable, power, or port configuration .
• Speed indication: LEDs may change color to indicate port speed (e.g., green for 1 Gbps, amber for 100 Mbps) depending on the switch model .
• Activity LED: Blinks to show traffic on the port; some switches combine link and activity into a single multicolor LED .

Troubleshooting Tips

• If a port LED is off, verify the cable, connected device, and port configuration.
• Amber or blinking LEDs may indicate errors such as collisions, CRC errors, or STP blocking; check switch logs and port settings .
• Ensure the total PoE power budget is not exceeded to prevent overload and maintain switch stability . Understanding these LEDs allows network administrators to quickly assess power delivery, connectivity, and potential faults, making PoE switch management more efficient and reliable.