Juniper QFX5220, Руководство по оборудованию, Страница: 139 / 247

NOTE: The switch powers on as soon as power is provided to the power supply. There is no
power switch on the device.
8. Verify that the LED on the power supply is lit green and is on steadily.
If the status LED is lit amber, remove power from the power supply, and replace the power supply (see
“How to Remove a Power Supply from a QFX5220” on page 157 ). Do not remove the power supply
until you have a replacement power supply ready. The power supplies must be installed in the
QFX5220-128C to ensure proper airflow.
CAUTION: Replace a failed power supply with a new power supply within 30 seconds
of removal to prevent chassis overheating.
How to Connect DC Power to a QFX5220-32CD-D
IN THIS SECTION
Before You Begin | 142
Connecting DC Power to a QFX5220-32CD-D | 143
Before You Begin
Before you begin connecting DC power to the switch:
•
Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage
(see “Prevention of Electrostatic Discharge Damage” on page 235 ).
•
Ensure you have connected the switch chassis to earth ground (see “Ground the QFX5220-32CD and
Connect Power” on page 132 ).
142