CHAPTER 3
Cooling System and Airflow
•
Cooling System and Airflow in an EX4300 Switch on page 41
Cooling System and Airflow in an EX4300 Switch
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
AIR IN (AFI)
, or front-to-back (air exhausts
through the back of the switch), indicated by the label
AIR OUT (AFO)
—depending on
the fan modules and power supplies installed in the switch.
This topic describes:
•
Fan Modules on page 41
•
Airflow Direction in EX4300 Switch Models on page 42
•
Front-to-Back Airflow on page 43
•
Back-to-Front Airflow on page 44
•
Do Not Mix AIR IN (AFI) and AIR OUT (AFO) Components in the Switch on page 45
•
Positioning the Switch on page 45
•
Fan Module Status on page 46
Fan Modules
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, and EX4300-48P-S switches are shipped with two fan modules
pre-installed in the rear panel of the switch. EX4300-24T-S, EX4300-24P-S,
EX4300-32F-S, EX4300-48T-S, and EX4300-48P-S switches are not shipped with
pre-installed fan modules; you must order them 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 0 and 1 and each slot has a fan icon next to it.
Figure 27 on page 42
shows the fan module used in an EX4300 switch:
41
Copyright © 2015, Juniper Networks, Inc.
Summary of Contents for EX4300
Page 1: ...EX4300 Switch Hardware Guide Modified 2015 06 29 Copyright 2015 Juniper Networks Inc ...
Page 16: ...Copyright 2015 Juniper Networks Inc xvi EX4300 Switch Hardware Guide ...
Page 22: ...Copyright 2015 Juniper Networks Inc xxii EX4300 Switch Hardware Guide ...
Page 24: ...Copyright 2015 Juniper Networks Inc 2 EX4300 Switch Hardware Guide ...
Page 102: ...Copyright 2015 Juniper Networks Inc 80 EX4300 Switch Hardware Guide ...
Page 104: ...Copyright 2015 Juniper Networks Inc 82 EX4300 Switch Hardware Guide ...
Page 128: ...Copyright 2015 Juniper Networks Inc 106 EX4300 Switch Hardware Guide ...
Page 172: ...Copyright 2015 Juniper Networks Inc 150 EX4300 Switch Hardware Guide ...
Page 176: ...Copyright 2015 Juniper Networks Inc 154 EX4300 Switch Hardware Guide ...
Page 218: ...Copyright 2015 Juniper Networks Inc 196 EX4300 Switch Hardware Guide ...
Page 236: ...Copyright 2015 Juniper Networks Inc 214 EX4300 Switch Hardware Guide ...
Page 238: ...Copyright 2015 Juniper Networks Inc 216 EX4300 Switch Hardware Guide ...
Page 250: ...Copyright 2015 Juniper Networks Inc 228 EX4300 Switch Hardware Guide ...
Page 256: ...Copyright 2015 Juniper Networks Inc 234 EX4300 Switch Hardware Guide ...
Page 278: ...Copyright 2015 Juniper Networks Inc 256 EX4300 Switch Hardware Guide ...
Page 286: ...Copyright 2015 Juniper Networks Inc 264 EX4300 Switch Hardware Guide ...
Page 292: ...Copyright 2015 Juniper Networks Inc 270 EX4300 Switch Hardware Guide ...
Page 306: ...Copyright 2015 Juniper Networks Inc 284 EX4300 Switch Hardware Guide ...
Page 312: ...Copyright 2015 Juniper Networks Inc 290 EX4300 Switch Hardware Guide ...
Page 336: ...Copyright 2015 Juniper Networks Inc 314 EX4300 Switch Hardware Guide ...