Juniper EX4300 Hardware Guide

Figure 28: Front-to-Back Airflow Through 24-Port and 48-Port EX4300
Switch Chassis
Front Rear
g022084
Figure 29: Front-to-Back Airflow Through 32-Port EX4300 Switch Chassis
You must install only power supplies that have AIR OUT (AFO) labels in switches in which
the fan modules have AIR OUT (AFO) labels.
Back-to-Front Airflow
In the EX4300 switch models that have back-to-front airflow, the air intake to cool the
chassis is through the vents on the rear panel and hot air exhausts through the vents on
the front panel of the switch. See Figure 30 on page 47.
Copyright © 2017, Juniper Networks, Inc.46
EX4300 Switch Hardware Guide

Juniper EX4300 Specifications

General

Model	EX4300
Virtual Chassis	Yes, up to 10 members
Layer 3 Routing	Yes
10GBASE SFP+ Ports	4
Jumbo Frames	9216 bytes
MAC Address Table Size	32, 000
Operating System	Junos OS
Uplink Ports	4 x 10GBASE SFP+
Power Supply	AC or DC options
Operating Temperature	0°C to 45°C (32°F to 113°F)
Input Voltage	100-240V AC
Operating Relative Humidity	5 to 90% RH, non-condensing
Management Options	CLI, Web UI, Junos Space
Redundancy	Yes, power supply and fans
Storage Temperature	-40°F to 158°F (-40°C to 70°C)
Ports	24 or 48