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by Juniper
Product Line: Juniper EX4300 Series
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Product Description

The EX-UM-8X8SFP Juniper module enhances the EX4300 series switches by adding an 8-port dual-mode 10GbE/1GbE module with pluggable SFP+/SFP optics, allowing for flexible network uplink options. It supports up to 12 10GbE ports and 4 40GbE ports with the module, accompanied by a 350 W AC power supply rating, ensuring efficient power management. Designed for scalability, it enables a 320 Gbps Virtual Chassis interconnect to unite up to 10 units as a single logical device, maximizing network performance and reliability.

FAQs for the EX-UM-8X8SFP

  • What is the maximum number of 10GbE ports available on the EX4300-32F when the 8-port 1GbE/10GbE SFP+ Uplink Module is installed?
    With the module installed, the EX4300-32F supports up to 12 10GbE ports.
  • How many 40GbE ports can the EX4300 series support with an expansion module?
    The EX4300 series can support up to 4 40GbE ports with an appropriate expansion module.
  • What is the power supply rating for the EX4300 series?
    The EX4300 series has a 350 W AC power supply rating.
  • Describe the airflow orientation and its significance in the EX4300-32F-DC model.
    The EX4300-32F-DC offers AFO (Air Flow Out) and AFI (Air Flow In) options, ensuring proper cooling by matching airflow direction with the data center cooling strategy.
  • How does the Virtual Chassis technology enhance the EX4300 series?
    Virtual Chassis technology allows up to 10 units to interconnect with a 320 Gbps backbone, functioning as a single logical device for simplified management.
  • What are the dimensions of the EX4300 series with the power supply and front module installed?
    With both installed, the dimensions are 17.36 x 1.72 x 19.31 inches (44.1 x 4.37 x 49.1 cm).
  • What is the system weight of the EX4300 series?
    The system weight is 13 lb (5.9 kg).
  • Can you detail the operating temperature range for the AFO models of the EX4300 series?
    AFO models operate between 32° F and 113° F.
  • What is the maximum operating altitude for the EX4300 series?
    The maximum operating altitude is 10,000 ft (3,049 m).
  • What are the minimum and maximum non-operating relative humidity levels for the EX4300 series?
    Non-operating relative humidity can range from 0% to 95% (non-condensing).

Product Review

The Juniper EX-UM-8X8SFP offers a versatile 8-port dual-mode 10GbE/1GbE module, enhancing the EX4300 series switches with expanded connectivity options for high-speed networking environments. However, its maximum of 12 10GbE ports when fully equipped might limit scalability in larger data center deployments. Additionally, the module supports a 320 Gbps Virtual Chassis interconnect to aggregate up to 10 units, but the initial power supply rating of 350W AC may necessitate an upgrade for power-intensive configurations, particularly in DC environments requiring the 550W DC options.


The Juniper EX-UM-8X8SFP is an 8-port 1GbE/10GbE SFP+ Uplink Module designed to enhance the capabilities of the EX4300 series switches, including the EX4300-32F and EX4300-32F-DC models. This module significantly expands the networking potential by offering additional high-speed connectivity options. It supports a dual-mode operation that allows the ports to run either 1GbE or 10GbE speeds, depending on the installed optics, providing flexibility in network design and scalability. With the inclusion of this module, the number of 10GbE ports available on the switch can increase to a maximum of 12, while also adding the possibility to include up to 4 40GbE ports with additional modules. This scalability is essential for growing networks that demand high bandwidth and lower latency connections. The module also facilitates a 320 Gbps Virtual Chassis interconnect, allowing up to 10 units to be combined as a single logical device, enhancing network resilience and simplifying management. The power supply of the EX-UM-8X8SFP is rated at 350 W AC for AFO (Front-to-back airflow) models, ensuring efficient power consumption and cooling. Additionally, for environments requiring DC power, the module supports a 550 W DC power supply with an AFO and AFI option, catering to a wide range of operational requirements. The input voltage range for DC models is specified at 43.5-60 V max (+/- 0.5 V), with a dual input feed for redundancy and reliability. Physically, the base unit dimensions are 17.36 x 1.72 x 17.87 inches (44.1 x 4.37 x 45.4 cm), which slightly increases with the power supply and front module installed, measuring 17.36 x 1.72 x 19.31 inches (44.1 x 4.37 x 49.1 cm). This compact size allows for efficient use of rack space. The system's weight is 13 lb (5.9 kg), making it manageable for installation and maintenance. Operating conditions are designed to accommodate a broad range of environments: - Operating temperature ranges from 32° F to 113° F for AFO models. - Storage temperature tolerance is between -40° F and 158° F. - The unit can operate at altitudes up to 10,000 ft (3,049 m) and be stored at altitudes up to 16,000 ft (4,877 m). Humidity levels are also a consideration in the module’s design:
  • Operating relative humidity can range from 10% to 85% (non-condensing).
  • Non-operating relative humidity is supported from 0% to 95% (non-condensing).
The maximum current inrush is specified at 50 amps, ensuring that the module can handle significant power spikes without damage. This specification, combined with its versatile power supply options, dimensions, and environmental tolerances, makes the Juniper EX-UM-8X8SFP an essential component for network administrators looking to upgrade their network's speed, resilience, and scalability.


Item Number Juniper EX-UM-8X8SFP
Manufacturer Juniper Networks
Compatible Models EX4300-32F, EX4300-32F-DC
10GbE Port Capacity Up to 12 with module
40GbE Port Capacity Up to 4 with module
AC Power Supply Output 350 W
Airflow Direction Front-to-back (AFO)
Virtual Chassis Bandwidth 320 Gbps, allows linking of up to 10 units
Module Type 8-port 10GbE/1GbE, SFP+/SFP compatible
Peak Current Draw 50 A
DC Power Supply 550 W for both AFO and AFI, voltage 43.5-60 V (+/- 0.5 V), dual feed
Dimensions without Modules 44.1 x 4.37 x 45.4 cm
Dimensions with Power Supply 44.1 x 4.37 x 48.28 cm
Dimensions with Power Supply and Module 44.1 x 4.37 x 49.1 cm
Weight 5.9 kg
Minimum Operating Temperature 0° C (AFO models)
Maximum Operating Temperature 45° C (AFO models)
Minimum Storage Temperature -40° C
Maximum Storage Temperature 70° C
Maximum Operating Altitude 3,049 m
Maximum Non-operating Altitude 4,877 m
Operating Humidity Range 10% to 85% (non-condensing)
Non-operating Humidity Range 0% to 95% (non-condensing)

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