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by Juniper
Product Line: Juniper QFX5100 Series
Product Type: Switch
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Product Description

The QFX5100-48S-3AFI is equipped with 48 SFP+/SFP ports and 6 QSFP+ ports, supporting up to 1.44 Tbps switching capacity and 1.08 Bpps forwarding rate. It features dual SFP/RJ-45 management ports, redundant fans, 2 AC power supplies, and ensures efficient operation with back-to-front cooling. Designed for flexibility, it includes 2x expansion module slots, operates within a temperature range of 32° to 104° F, and consumes 150W power, fitting in a standard 19-in server rack.

FAQs for the QFX5100-48S-3AFI

  • What is the switching capacity of the QFX5100?
    The switching capacity of the QFX5100 is 1.44 Tbps/1.08 Bpps.
  • How many SFP+/SFP ports does the switch have?
    The switch has 48 SFP+/SFP ports and 6 QSFP+ ports.
  • Can the QFX5100 support both AC and DC power supplies?
    Yes, the QFX5100 supports 110-240 V single phase AC power and -36 to -72 V DC power.
  • What are the management port options available on this device?
    The device offers 1x RJ-45 Serial Console, 1x RJ-45 Gigabit Management, 1x Gigabit SFP Management, and 1x USB.
  • What type of airflow system does the QFX5100 utilize?
    The QFX5100 utilizes a back-to-front airflow system.
  • How many expansion module slots are available?
    There are 2 expansion module slots available.
  • What are the power consumption and weight of the switch?
    The power consumption is 150W, and the weight is 21.8 lb (9.9 kg).
  • What are the dimensions of the QFX5100?
    The dimensions are 1.72 x 17.36 x 20.48 in (4.37 x 44.09 x 52.02 cm).
  • Does the QFX5100 support redundant fans and power supplies?
    Yes, it supports redundant (N+1) and hot-pluggable fan modules, as well as dual redundant (1+1) and hot-pluggable power supplies.
  • What are the operating and storage temperature ranges for the QFX5100?
    The operating temperature range is 32° to 104° F (0° to 40° C), and the storage temperature range is -40° to 158° F (-40° to 70° C).

Product Review

The Juniper QFX5100-48S-3AFI offers a high switching capacity of 1.44 Tbps/1.08 Bpps, catering to data-intensive environments, and its dual power supplies and fan modules ensure uninterrupted operation. However, the device's limitation to a maximum operating temperature of 40°C might restrict its deployment in hotter data centers without adequate cooling. Additionally, while the switch's versatility is enhanced by its mix of SFP+/SFP and QSFP+ ports, the requirement for breakout cables to achieve the maximum port density could be seen as an inconvenience in some configurations.


The Juniper QFX5100-48S-3AFI is a high-performance switch designed for data center and enterprise networking applications. It boasts an array of features tailored for efficiency, scalability, and reliability in demanding operational environments. At its core, the QFX5100-48S-3AFI offers 48 SFP+/SFP ports and 6 QSFP+ ports, providing versatile connectivity options for various network requirements. This switch supports both 1GbE SFP and 10GbE SFP+ interfaces, with the capability to expand up to 72 10GbE connections using breakout cables. The inclusion of 40GbE QSFP+ ports further enhances its capacity for high-speed network deployments. Management of the device is facilitated through dual SFP/RJ-45 management ports, ensuring a range of connectivity options for network administrators. These include 1 RJ-45 Serial Console port, 1 RJ-45 Gigabit Management port, 1 Gigabit SFP Management port, and 1 USB port for additional flexibility in network management and configuration tasks. The QFX5100-48S-3AFI is engineered with redundancy and reliability in mind. It features redundant fans and dual AC power supplies to ensure uninterrupted operation. The power supplies are hot-pluggable, supporting 1+1 redundancy, and can operate across a wide range of AC and DC power inputs (110-240 V single phase AC and -36 to -72 V DC). This switch is designed with back-to-front airflow, optimizing cooling for improved performance in varied operational conditions. Key specifications include: - Switching Capacity: 1.44 Tbps/1.08 Bpps, demonstrating its capability to handle significant data throughput and packet processing speed. - Power Consumption: 150W, indicating an efficient use of power relative to its performance capabilities. - Weight: 21.8 lb (9.9 kg), and Dimensions: 1.72 x 17.36 x 20.48 in, making it suitable for deployment in standard 19-inch server racks. Additional features of interest include:
  • Dual redundant (N+1) and hot-pluggable fan modules, ensuring consistent cooling and system reliability.
  • Two expansion module slots, providing options for network customization and expansion to meet growing demands.
  • Comprehensive environmental tolerances, with an operating temperature range of 32° to 104° F, storage temperature range of -40° to 158° F, and an operating altitude of up to 2,000 meters. This device is built to operate reliably in a wide range of conditions, further supported by its robust humidity tolerance for both operating and non-operating states.
The Juniper QFX5100-48S-3AFI is tailored for organizations seeking a scalable, reliable, and high-performing networking solution. Its comprehensive feature set, including extensive port availability, management flexibility, and designed-in redundancy, makes it a compelling choice for data center and enterprise network applications seeking to optimize their networking infrastructure.


Part Number Juniper QFX5100-48S-3AFI
Manufacturer Juniper
Port Configuration 48 SFP+/SFP interfaces, 6 QSFP+ interfaces
Management Interfaces 2x combination SFP/RJ-45, 1x RJ-45 Serial Console, 1x RJ-45 Gigabit Ethernet, 1x SFP Gigabit Ethernet, 1x USB port
Cooling System Hot-swappable, redundant fans; airflow from back to front
Power Supply 2 AC power units, redundant and hot-pluggable, supports 110-240 V AC and -36 to -72 V DC
Module Options 2 slots for expansion modules
Switching Performance 1.44 Terabits per second/1.08 Billion packets per second
Power Usage 150 Watts
Physical Weight 21.8 pounds (9.9 kilograms)
Dimensions 1.72 x 17.36 x 20.48 inches (4.37 x 44.09 x 52.02 centimeters)
Cooling Orientation Airflow direction from back to front
Compatibility with Rack Designed for 19-inch server racks
1 Gigabit Ethernet SFP Support 48 ports (includes 24 copper ports)
10 Gigabit Ethernet SFP+ Support 48/72 ports (via breakout cable)
40 Gigabit Ethernet QSFP+ Support 6 ports
Operational Temperature Range 32° to 104° Fahrenheit (0° to 40° Celsius)
Storage Temperature Range -40° to 158° Fahrenheit (-40° to 70° Celsius)
Maximum Operating Altitude Up to 2,000 feet (610 meters)
Operational Humidity Range 5% to 90%, non-condensing
Non-operational Humidity Range 0% to 95%, non-condensing

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