Hardware Overview 393 Installing the HardwareThe following table describes the LEDs and Mode Select Button on the front panel of eachSwitch.Table 2. LED DescriptionLED DescriptionPower This LED lights green after powering the Switch on to indicate the readystate of the device. The indicator is dark when the Switch is no longerreceiving power (i.e powered off).Console This LED blinks green during the Power-On Self Test (POST). When thePOST is finished, the LED goes dark. The indicator lights steady green whenan active console link is in session via the RS-232 console port.RPS This LED lights when the internal power has failed and the RPS has takenover the power supply to the Switch. Otherwise, it remains dark.Link/Act/Speedand PoE ModeYou can change the mode of the LEDs over each port to display theinformation about the link, activity, and speed of a port or whether 802.3afPower Over Ethernet (PoE) is supporting devices attached to the port.To change the LED mode from Link/Act/Speed to PoE and vice versa, pressthe LED Mode Select Button.Port LEDs One row of LEDs for each port is located above the ports on the front panel.The indicator above the left side of a port corresponds to the port below theindicator in the upper row of ports. The indicator above the right side of aport corresponds to the port below the indicator in the lower row of ports.The port LEDs show information about link, activity, and speed on the portor Power over Ethernet usage on the port, depending on the LED mode youselect.For Link/Act/Speed Mode:• Solid Green—Indicates a valid 1000Mbps link on the port, while ablinking green light indicates activity on the port (at 1000Mbps).• Solid Amber—Indicates a valid 10 or 100Mbps link on the port.• Blinking Amber—Indicates activity on the port (at 100Mbps).• Off—No link/activity on the port.For PoE Mode:• Solid Green—Power feeding (802.3af-compliant PD was detected).• Blinking Amber—PoE port ERROR (non-standard PD connected, Underload state according to 802.3af (current is below I min), Overload stateaccording to 802.3af (current is above I cut), hardware problemspreventing port operation, power budget exceeded, short condition wasdetected at a port delivering power, temperature overload at the port,succession of Underload and Overload states caused port shutdown (maybe caused by a PD's DC/DC fault)...etc.)• Off—No power feeding (no PD detected, or no connection)
