77Port mode LED(Mode) statusManagementEthernet port LED(ACT/LINK) statusDescriptionSteady yellow(duplex mode)Steady green The port is operating in full duplex mode. The port LED fastflashes when the port is sending or receiving data.Steady yellow The port is operating in half duplex mode. The port LED fastflashes when the port is sending or receiving data.Flashing yellow (3 Hz) POST has failed on the port.Off No link is present on the port.10/100/1000Base-T Ethernet port LEDEach 10/100/1000Base-T auto-sensing Ethernet port has a status LED to show port operating status andactivities. The port mode LED indicates the type of port status information (for example, port rate orduplex mode) that the port LEDs are showing. You can use the port LED mode switching button to changethe type of displayed port information.Table 23 10/100/1000Base-T Ethernet port LED descriptionPort mode LED(Mode) status Port LED status DescriptionSteady green (ratemode)Steady green The port is operating at 1000 Mbps. The port LED fastflashes when the port is sending or receiving data.Steady yellow The port is operating at 10/100 Mbps. The port LEDfast flashes when the port is sending or receiving data.Flashing yellow (3 Hz) POST has failed on the port.Off No link is present on the port.Flashing green (1 Hz)(PoE mode, supportedbyS5500-34C-PWR-HIandS5500-58C-PWR-HIonly)Steady green PoE power supply is normal.Flashing green (1 Hz)The device attached to the port requires power higherthan the maximum or currently available PoE outputpower on the port.Steady yellow The port is experiencing a PoE failure.Flashing yellow (3 Hz) POST has failed on the port.Off The port is not supplying PoE power.Steady yellow (duplexmode)Steady green The port is operating in full duplex mode. The port LEDfast flashes when the port is sending or receiving data.Steady yellowThe port is operating in half duplex mode. The portLED fast flashes when the port is sending or receivingdata.Flashing yellow (3 Hz) POST has failed on the port.Off No link is present on the port.