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Juniper Networks EX4300 Ethernet Switches provide connectivity for high-density environments and scalability for growing networks. These switches can be deployed wherever you need high density of Gigabit Ethernet ports or redundancy. Typically, EX4300 switches are used in large branch offices, campus wiring closets, and data centers. In data centers, EX4300 switches can be positioned as top-of-rack switches—the top devices in a rack—to provide connectivity for all the devices in the rack and provide options for optimized airflow (hot aisle/cold aisle).

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 40-Gigabit Ethernet quad small form-factor pluggable plus (QSFP+) ports that can house 40-Gigabit 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 QSFP+ ports are configured as Virtual Chassis Ports (VCPs) by default. You can use them to connect the switches to other devices in a Virtual Chassis configuration.

EX4300 switches support two power supplies, installed on the rear panel. The cooling system in an EX4300 switch consists of two fan modules, installed on the rear panel, and a single fan in each power supply.