CHAPTER 3
Cooling System and Airflow
•
QFX5110 Cooling System and Airflow on page 25
•
QFX5110 Fan Module LED on page 30
QFX5110 Cooling System and Airflow
The cooling system in an QFX5110 device consists of five fan modules and a single fan
in each power supply. The switch can be set up to work in one of two airflow directions:
•
Airflow In–Air comes into the switch through the vents in the field-replaceable units
(FRUs)
•
Airflow Out–Air comes into the switch through the vents in the port panel.
All QFX5110 switches, except the QFX5110-32Q-CHAS, are shipped with five fan modules
and two power supplies. Order fans for the QFX5110-32Q-CHAS separately.
CAUTION: Airflow In and Airflow Out fans and power supplies cannot be
mixed in the same chassis.
This topic describes:
•
Fan Modules on page 25
•
Do Not Install Components with Different Airflow or Wattage in the Switch on page 29
Fan Modules
The fan modules in QFX5110 devices are hot-insertable and hot-removable FRUs. These
fan modules are designed for one of the two available airflow directions (Airflow In or
Airflow Out). The fan modules are also color-coded for the airflow direction. The fan
modules are installed in the fan module slots between the management panel and the
power supplies.
The QFX5110 fan modules have five fan modules numbered 0 through 4 counting from
left to right. Each fan module slot has a fan icon next to it.
Figure 9 on page 26 shows the fan module.
25Copyright © 2017, Juniper Networks, Inc.
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