Figure 112: Fan Module Used In Ex4300 Switches Except Ex4300-48Mp And Ex4300-48Mp-S Switches - Juniper QFabric QFX3000-G Hardware Documentation

QFX3000-G QFabric System Hardware Documentation
Cooling System and Airflow in an EX4300 Switch
Fan Modules
156
The cooling system in an EX4300 switch consists of two fan modules and a single fan
in each power supply. EX4300 switches provide back-to-front airflow (air enters through
the back of the switch), indicated by the label
through the back of the switch), indicated by the label
—depending on the fan modules and power supplies installed in the switch.
OUT
Fan Modules on page 156
Airflow Direction in EX4300 Switch Models on page 157
Front-to-Back Airflow on page 158
Back-to-Front Airflow on page 160
Do Not Mix AIR IN (AFI) and AIR OUT (AFO) Components in the Switch on page 161
Positioning the Switch on page 161
Fan Module Status on page 161
In the EX4300 switches the fan modules are hot-insertable and hot-removable
field-replaceable units (FRUs).
All the EX4300 switches, except EX4300-24T-S, EX4300-24P-S, EX4300-32F-S,
EX4300-48T-S, EX4300-48P-S, and EX4300-48MP-S switches are shipped with two
fan modules installed in the rear panel of the switch. EX4300-24T-S, EX4300-24P-S,
EX4300-32F-S, EX4300-48T-S, EX4300-48P-S, and EX4300-48MP-S switches are
not shipped with fan modules; you must order the fan modules separately. Each switch
can accommodate two fan modules in the fan module slots on the rear panel of the
switch. The fan module slots are numbered
it.
Figure 112 on page 156 shows the fan module used in EX4300 switches except
EX4300-48MP and EX4300-48MP-S switches.
module used in EX4300-48MP and EX4300-48MP-S switches:
Figure 112: Fan Module Used in EX4300 Switches Except EX4300-48MP and
EX4300-48MP-S Switches
, or front-to-back (air exhausts
AIR IN (AFI)
AIR OUT (AFO)
and and each slot has a fan icon next to
0 1
Figure 113 on page 157
Copyright © 2018, Juniper Networks, Inc.
or
AIR
shows the fan