Juniper EX4300 Hardware Guide

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For 32-port EX4300 switches:
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QSFP+ ports (built-in) or QSFP+ uplink module ports configured as VCPs
•
SFP+ uplink module ports configured as VCPs
NOTE: The four built-in SFP+ ports on 32-port EX4300 switches cannot
be configured as VCPs.
By default, the built-in QSFP+ ports are configured as VCPs.
Power Supplies
EX4300 switches support AC or DC power supplies with different airflow directions.
Power supplies for the EX4300 switch are fully redundant, load-sharing, and
hot-removable and hot-insertable FRUs. All the EX4300 switch models except
EX4300-24T-S, EX4300-24P-S, EX4300-32F-S, EX4300-48T-S, and EX4300-48P-S
switches are shipped with one power supply preinstalled in the rear panel of the switches.
EX4300-24T-S, EX4300-24P-S, EX4300-32F-S, EX4300-48T-S, and EX4300-48P-S
switches are not shipped with preinstalled power supplies; you must order the power
supplies separately.
Each power supply has a label—AIR IN (AFI) or AIR OUT (AFO)—on the faceplate of the
power supply that indicates the direction of airflow. AIR IN (AFI) labels indicate
back-to-front airflow while AIR OUT (AFO) labels indicate front-to-back airflow.
Table 8 on page 11 lists the AC and DC power supplies used in EX4300 switches and
the direction of airflow in them.
Table 8: Airflow Direction in Power Supplies for EX4300 Switches
Direction of AirflowLabel on Power SupplyPower Supply Rating
Back-to-front—that is, air intake to cool the
chassis is through the vents on the rear panel of
the chassis and hot air exhausts through the vents
on the front panel of the chassis.
AIR IN (AFI)350 W AC
Front-to-back—that is, air intake to cool the
chassis is through the vents on the front panel of
the chassis and hot air exhausts through the vents
on the rear panel of the chassis.
AIR OUT (AFO)350 W AC
Back-to-front—that is, air intake to cool the
chassis is through the vents on the rear panel of
the chassis and hot air exhausts through the vents
on the front panel of the chassis.
AIR IN (AFI)550 W DC
Front-to-back—that is, air intake to cool the
chassis is through the vents on the front panel of
the chassis and hot air exhausts through the vents
on the rear panel of the chassis.
AIR OUT (AFO)550 W DC
11Copyright © 2017, Juniper Networks, Inc.
Chapter 1: System Overview

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