14Switch model Port modeLED Ethernet port status LED MeaningOn The port operates at a rate of 10/100Mbps.Fast blinking Data is transmitted or received at a rate of10/100 Mbps.YellowOff The port is not up or does not operate at10/100 Mbps.On PoE power supply is normal.Blinking at 3HzPower consumption of the deviceattached to the port exceeds the upperlimit of the power supply consumption ofthe port, or the available power of theswitch is not enough for power supply ofthe port.GreenOff No PoE power supply is provided on theport.On The device connected to the interface isnot a PD device or a PoE failure occursBlinkinggreen (PoEmode)YellowOff No PoE power supply is provided on theport or PoE power supply is normal.1000Base-X SFP interface status LEDNOTE:For the S5120-9P-HPWR-SI, S5120-28P-PWR-SI, and S5120-28P-HPWR-SI, the port mode switchingbutton does not take effect for the 1000Base-X SFP interface LEDs.Table 11 1000Base-X SFP interface status LEDs descriptionSFP interface status LED MeaningSolid green The port operates at a rate of 1000 MbpsThe port is transmitting data at 1000 MbpsBlinking green The LED is fast flashing when data is being received on the port.Off No link is present on the port.