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by Juniper
Product Line: Juniper EX4300 Series
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Product Description

The EX4300-48MP-S Juniper chassis features a 24-port 10/100/1000BASE-T and a 48-port 100/1000/2500/5000/10000BASE-T with 95 W PoE for diverse connectivity and power over Ethernet capabilities. It supports a 320 Gbps Virtual Chassis interconnect, allowing up to 10 units to operate as a single device, and offers a packet switching capacity of 464 Gbps (unidirectional)/928 Gbps (bidirectional) with a throughput of 714 Mpps. The system is designed for efficiency with a maximum airflow of 59 CFM, operating temperatures ranging from 32° F to 113° F, and supports LC SFP fiber with SX and LX options for flexible fiber connectivity.

FAQs for the EX4300-48MP-S

  • What is the maximum power over Ethernet (PoE) capability of the 24-port and 48-port chassis?
    The 24-port and 48-port chassis support up to 95 W PoE.
  • How can the spare chassis with part number 24-port 10/100/1000BASE-T enhance network performance?
    The spare chassis can enhance network performance by providing high-speed connectivity and supporting power over Ethernet for up to 24 devices.
  • What is the maximum packet switching capacity of the networking hardware?
    The maximum packet switching capacity is 464 Gbps unidirectional and 928 Gbps bidirectional.
  • Can the 48-port 100/1000/2500/5000/10000BASE-T spare chassis support virtual chassis configurations?
    Yes, it supports a 320 Gbps Virtual Chassis interconnect to combine up to 10 units as a single logical device.
  • What are the dimensions of the base unit without additional modules?
    The base unit dimensions are 17.36 x 1.72 x 18.39 inches (44.1 x 4.37 x 46.7 cm).
  • What is the weight of the SFP+ uplink module for the specified networking hardware?
    The SFP+ uplink module weighs 0.44 lb (0.2 kg).
  • What types of fiber optic connectors are supported by the GbE SFP optics?
    The GbE SFP optics support LC SFP fiber connectors, including SX (multimode) and LX (single-mode).
  • What is the total maximum airflow throughput when the system is equipped with two power supplies?
    The total maximum airflow throughput with two power supplies is 59 CFM.
  • What is the operating temperature range for this networking hardware?
    The operating temperature range is from 32° F to 113° F.
  • How many GbE port densities per system does the hardware support?
    The system supports a GbE port density of 56, which includes 48 host ports plus four 40GbE ports and an optional four-port 1/10GbE uplink module.

Product Review

The Juniper EX4300-48MP-S offers a versatile port configuration, supporting speeds up to 10Gbps on 48 ports with 95W PoE, catering to high-density, power-demanding environments. With a backplane capacity of 320 Gbps, it enables the interconnection of up to ten units as a single logical device, enhancing scalability and simplified management. However, its dimensions and weight could pose challenges in tight spaces, and the system's reliance on field-replaceable units for cooling necessitates additional consideration for deployment in environments with limited maintenance access.


The Juniper EX4300-48MP-S is a versatile and high-performance networking switch designed to cater to the demands of modern enterprise networks. This switch is capable of providing a high-density array of ports, including a 24-port configuration supporting 10/100/1000BASE-T and a 48-port configuration that supports 100/1000/2500/5000/10000BASE-T, making it suitable for a wide range of applications. Furthermore, it offers Power over Ethernet (PoE) capabilities with a power budget of 95W to support devices such as IP phones and surveillance cameras without the need for separate power supplies. One of the standout features of the EX4300-48MP-S is its backplane, which boasts a 320 Gbps Virtual Chassis interconnect. This allows up to 10 units to be combined, functioning as a single logical device, significantly enhancing scalability and simplifying network management. In terms of physical dimensions, the base unit measures 17.36 inches in width, 1.72 inches in height, and 18.39 inches in depth. When equipped with a power supply, the depth extends to 19.63 inches, and with both the power supply and front module installed, it reaches 20.06 inches. The system's weight varies with the addition of modules, with the SFP+ uplink module weighing 0.44 lb and the fan module weighing 0.33 lb. The switch is designed with two field-replaceable fans to ensure optimal cooling, supporting a total maximum airflow throughput of 59 CFM with two power supplies installed. The EX4300-48MP-S demonstrates impressive performance, featuring a packet switching capacity of 464 Gbps unidirectional and 928 Gbps bidirectional. It supports a throughput of 714 Mpps and offers a GbE port density of 56 per system, which includes 48 host ports, four 40GbE ports, and an optional four-port 1/10GbE uplink module.
  • Operating temperatures range from 32° F to 113° F, with storage temperatures spanning from -40° F to 158° F.
  • The system can operate at altitudes up to 10,000 ft and be stored at altitudes up to 16,000 ft.
  • Relative humidity levels during operation can range from 10% to 85%, non-condensing.
For connectivity, the switch supports GbE SFP optics/connectors, including LC SFP fiber that supports both SX (multimode) and LX (single-mode), offering flexibility for different network requirements. The Juniper EX4300-48MP-S is designed to meet the needs of complex enterprise environments, offering a robust feature set that supports high scalability, flexibility, and performance. Its advanced capabilities make it a suitable option for businesses looking to build a high-performance, resilient network infrastructure.


Part Number EX4300-48MP-S
Manufacturer Juniper
Configuration Options Base model: 24x 10/100/1000BASE-T ports, Expansion model: 24x 100/1000/2500/5000/10000BASE-T ports, both with 95W PoE capability
Virtual Chassis Capability Connect up to 10 units for a combined 320 Gbps bandwidth
Dimensions (Base Unit) 17.36 x 1.72 x 18.39 inches (44.1 x 4.37 x 46.7 cm)
Dimensions (With Power Supply) 17.36 x 1.72 x 19.63 inches (44.1 x 4.37 x 49.99 cm)
Dimensions (Fully Equipped) 17.36 x 1.72 x 20.06 inches (44.1 x 4.37 x 50.96 cm)
Weight (SFP+ Uplink Module) 0.44 pounds (0.2 kg)
Weight (Fan Module) 0.33 pounds (0.15 kg)
Fan Count 2, user-replaceable
Airflow (Per Power Supply Unit) 7.5 cubic feet per minute
Switching Capacity 464 Gbps one-way, 928 Gbps two-way
Port Density 56 total: 48 host + 4x 40GbE + 4x 1/10GbE (optional)
Throughput 714 million packets per second (Mpps)
Airflow (with Dual Power Supplies) 59 cubic feet per minute
Minimum Operating Temperature 32° F
Maximum Operating Temperature 113° F
Minimum Storage Temperature -40° F
Maximum Storage Temperature 158° F
Maximum Operating Altitude 10,000 feet (3,049 m)
Maximum Non-operating Altitude 16,000 feet (4,877 m)
Operating Humidity Range 10% to 85% (non-condensing)
Fiber Optic Connector Types LC SFP for SX (multimode) and LX (single-mode) fibers

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