Monitor the Switch
System Status LEDs on page 77
RJ-45 Management Port LEDs on page 78
QSFP28 Port LEDs on page 78
800 W AC Power Supply LEDs on page 79
800 W DC Power Supply LEDs on page 79
The following topics help you monitor the status of the switch as it is running:
System Status LEDs
System status LEDs are located on the front of the switch. The following table describes
the colors and the states for the LEDs.
Label or Type
Color/State Meaning
PSU1, PSU2
(Power Supplies)
Steady green PSU is installed and providing power
Steady amber PSU is installed but input power is
disconnected or unit fault detected
Off PSU is not installed
FAN Steady green All fans operating normally
Steady amber A fan has been removed or fault
detected
Off No power to fan modules
SYS
(System)
Steady green System loaded properly and is ready
Steady amber Either the PSU or fan or both are
faulty, not present, or the system has
not loaded properly
Off CPU power is off
PWR
(Power)
Steady green Normal operation
Blinking green System in reset
Off Unit not operational
Extreme 7720 Hardware Installation Guide 77
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