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Table 2. Back panel components (Continued)
Number
Description
5
Bay 1 (PSU 1) for a modular PSU (see
6
Fixed fans for front-to-back air flow
7
Switch label
8
Bay 2 (PSU 2) for a second modular PSU (see
System LEDs
The following table describes the system LEDs on the front panel of switch and the single LED on the back
panel of the switch.
Table 3. System LEDs
LED
Description
Front panel LEDs
Stack ID LED
The Stack LED contains segments that can indicate the stack unit number of the switch.
Solid green indicating a number. The switch is a member of a stack. The LED displays
the stack unit number.
Solid green indicating E. The switch functions in economy (ECO) mode with all port LEDs
turned off.
Off. The switch is not a member of a stack.
Power 1 LED (for the
Solid green. The power supply unit is present, is supplying power to the switch, and is
PSU 1 bay)
functioning normally.
and
Solid yellow. The switch is starting.
Power 2 LED (for the
Blinking yellow. The switch failed to start correctly or another failure occurred.
PSU 2 bay)
Off. Power is not supplied to the switch.
Fan LED
Solid green. The fans are functioning normally.
Blinking yellow. One or more fans failed.
Off. Power is not supplied to the switch. The fans are off.
Stack Master LED
Solid green. The switch is functioning as a master in a stack.
Off. The switch is not a member of a stack or is functioning as a slave in a stack.
PoE Max LED
Off. Sufficient (more than 7W of) PoE power is available on the switch.
Solid yellow. Less than 7W of PoE power is available on the switch.
Blinking yellow. At least once during the previous two minutes, less than 7W of PoE power
was available on the switch.
Fully Managed Stackable Switch M4300-96X
Power Supply Units
Hardware Overview
on page 22)
Power Supply Units
on page 22)
14
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Troubleshooting
