Port Link ActivityPort Duplex ModeSystem LEDsThe eight system LEDs indicate the status of various aspects of the device:l As shown in the front panel figures at the start of this section, the two system LEDs on the upper left side represent Link Activity and Duplex. TheseLEDs indicate whether the port LEDs are displaying link activity or duplex status.l The two LEDs on the lower left-side of the figures show the link activity status of Giga Ports 1 and 2 as follows:Giga Port Link Activity Statusl The Mode button located next to the system LEDs is used to toggle between the two display modes. For an explanation of the port LEDs in each ofthese modes, see "Port LEDs".When a power supply fails, an error message and several traps are generated. The status of each power supply is indicated by LEDs on the front panel.l The four LEDs on the right side show the status of the power supplies, diagnostic mode, and stack mode as follows:Power, Diagnostic, and Stack LEDsStacking LEDsRed Static Port link up.Port operating at 10 Mbps.Red Flashing Port link up with activity.Port operating at 10 Mbps.Off Off Port link down.Color Activity DefinitionGreen Static Port full duplex.Off Off Port link down or half duplex.Color Activity DefinitionGreen Static Port link up.Port operating at 1000 Mbps.Green Flashing Port link up with activity.Port operating at 1000 Mbps.Red Static Port link up.Port operating at 10/100 Mbps.Red Flashing Port link up with activity.Port operating at 10/100 Mbps.Off Off Port link down.LED Color Activity DefinitionPWR Green Static Power supply operational.Amber Static Power supply failure.RPS Green Static Redundant power supply operational.Amber Static Redundant power supply failure.Off Off Redundant power supply not present.Diag Green Flashing The system is currently in the Diagnostic mode.Stack Green Static Stacking successfully completed.Off Off Standalone.