Juniper EX4300 Series User Manual

Back-to-Front Airow
In the EX4300 switch models that have back-to-front airow, 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 41 on page 88.
Figure 41: Back-to-Front Airow Through the 24-Port and 48-Port EX4300 Switch Chassis
You must install only power supplies that have AIR IN (AFI) labels in switches in which the fan modules
have AIR IN (AFI) labels.
Do Not Mix AIR IN (AFI) and AIR OUT (AFO) Components in the Switch
Do not mix power supplies and fan modules with dierent airow labels (AIR IN (AFI) and AIR OUT
(AFO)) in the same chassis. If the fan modules have AIR IN (AFI) labels, the power supplies must also
have AIR IN (AFI) labels; if the fan modules have AIR OUT (AFO) labels, the power supplies must also
have AIR OUT (AFO) labels.
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Juniper EX4300 Series Specifications

General

Product Series	EX4300 Series
Power Consumption	Varies by model and configuration
Virtual Chassis Technology	Up to 10 switches
Software	Junos OS
Ports	24-port and 48-port models
10GBASE SFP+ Ports	Up to 8 ports
40GBASE QSFP+ Ports	2
Uplink Ports	Up to 4 ports
Jumbo Frames	Up to 9216 bytes
Operating Temperature	0°C to 45°C
Relative Humidity	5% to 90% noncondensing
Input Voltage	100 to 240V AC
Power Supply	AC or DC
Power Supply Options	AC or DC
Stacking	Yes
Layer 2 Features	Includes VLAN, STP, RSTP, MSTP, LACP
Layer 3 Features	OSPF, BGP
Management	CLI, Web GUI, SNMP
Security Features	DHCP snooping
QoS	8 queues per port, DSCP
Storage Temperature	-40°C to 70°C