Juniper EX4300 Series Hardware Manual page 19

48-Port EX4300 Switches
The 48-port EX4300 switches EX4300-48T and EX4300-48P provide 48 built-in 10/100/1000BASE-T
Ethernet network ports, with or without PoE+ depending on the switch model, and four built-in quad
small form-factor pluggable plus (QSFP+) ports that can house 40-Gigabit QSFP+ transceivers. All
network ports in the EX4300-48P switch are equipped for Power over Ethernet (PoE+), whereas
EX4300-48T has no PoE+ ports. These switches support AC or DC power supply with different airflow
directions. Each switch provides a slot for installing an optional 4-port 10-Gigabit Ethernet SFP+ uplink
module (model number: EX-UM-4X4SFP), which has four SFP+ ports that can house four SFP+
transceivers, four SFP transceivers, or a combination of SFP and SFP+ transceivers in the four ports on
the uplink module.
The 48-port EX4300 switches with multigigabit ports—EX4300-48MP and EX4300-48MP-S—provide
24 built-in 10/100/1000BASE-T Ethernet network ports, 24 built-in
100/1000/2500/5000/10000BASE-T Ethernet network ports, and four built-in Virtual Chassis Ports
(VCPs) that house 40-Gbps quad small form-factor plus (QSFP+) transceivers. The 24 built-in
10/100/1000BASE-T Ethernet network ports support 10 Mbps, 100 Mbps, and 1 Gbps speeds. The 24
built-in 100/1000/2500/5000/10000BASE-T Ethernet network ports support 100 Mbps, 1 Gbps,
2.5 Gbps, 5 Gbps, and 10 Gbps speeds. All network ports are equipped for PoE+ and provide up to
95 watts of power. The four VCPs can be used to connect the switches to other devices in a Virtual
Chassis configuration.
These switches support AC power supply with front-to-back airflow.
Each switch provides a slot for installing an optional 2-port 40-Gigabit Ethernet QSFP+/100-Gigabit
Ethernet QSFP28 uplink module (model number: EX-UM-2QSFP-MR) or a 4-port 1-Gigabit
Ethernet/10-Gigabit Ethernet SFP+ uplink module (model number: EX-UM-4SFPP-MR). The 2-port 40-
Gigabit Ethernet QSFP+/100-Gigabit Ethernet QSFP28 uplink module can house two QSFP+
transceivers, two QSFP28 transceivers, or a combination of one QSFP+ transceiver and one QSFP28
transceiver. The 4-port 1-Gigabit Ethernet/10-Gigabit Ethernet SFP+ uplink module can house four SFP
transceivers, four SFP+ transceivers, or a combination of SFP and SFP+ transceivers in the four ports on
the uplink module.
NOTE: The switch supports the 2-port 40-Gigabit Ethernet QSFP+/100-Gigabit Ethernet
QSFP28 uplink module (model number: EX-UM-2QSFP-MR) from Junos OS Release 18.4R1
onwards. Starting in Junos OS Release 19.3R1, you can install two 100-Gigabit Ethernet QSFP28
transceivers in the uplink module. In Junos OS Release 18.4R1 through Junos OS Release
19.2R1, the uplink module supported only one 100-Gigabit Ethernet transceiver. If you configure
both the ports on the uplink module to operate at 100-Gbps speed, the four QSFP+ ports on the
switch are disabled.
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