oces, campus wiring closets, and data centers. In data centers, these switches can be posioned as the
top devices in a rack to provide connecvity for all devices in the rack and provide opons for opmized
airow (hot aisle/cold aisle).
To provide carrier-class reliability, EX4300 switches include:
• Dual redundant, load-sharing power supplies that are hot-insertable and hot-removable eld-
replaceable units (FRUs).
• Two fan modules that are eld-replaceable units.
• Redundant Roung Engines in a Virtual Chassis or QFX5100 Virtual Chassis Fabric (VCF)
conguraon. This redundancy enables graceful Roung Engine switchover (GRES).
• Junos OS with its modular design that enables failed system processes to gracefully restart.
The following EX4300 switches are available:
24-Port EX4300 Switches
The 24-port EX4300 switches—EX4300-24T and EX4300-24P—provide 24 built-in 10/100/1000BASE-
T Ethernet network ports and four built-in 40-Gigabit Ethernet quad small form-factor pluggable plus
(QSFP+) ports that can house 40-Gigabit QSFP+ transceivers. All network ports in the EX4300-24P
switch are equipped for Power over Ethernet (PoE+), whereas EX4300-24T has no PoE+ ports. 24-port
EX4300 switches support AC power supply and fan module with front-to-back airow direcon and
have a slot for installing an oponal 4-port 10-Gigabit Ethernet SFP+ uplink module (model number: EX-
UM-4X4SFP), which has four 10-Gigabit Ethernet small form-factor pluggable plus (SFP+) ports that can
house four 10-gigabit small form-factor pluggable (SFP+) transceivers, four 1-gigabit small form-factor
pluggable (SFP) transceivers, or a combinaon of SFP+ and SFP transceivers in the four ports on the
uplink module.
Figure 1 on page 4 shows the front panel of a 24-port EX4300 switch.
Figure 1: Front Panel of a 24-Port EX4300 Switch
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