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EX4300-48T-AFI – Juniper EX4300 Series Ethernet Switches


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Choosing the Juniper EX4300-48T-AFI switch for your network infrastructure means investing in reliability, efficiency, and scalability. An integral part of Juniper Networks’ EX4300 line, this switch boasts a powerful feature set including 48 gigabit Ethernet ports complemented by 4 QSFP+ ports, ideal for both campus and data center use. The backplane speed of 320 Gbps enables the handling of massive amounts of data, while the 496 Gbps data rate ensures that all data is processed quickly and efficiently.

The EX4300-48T-AFI supports Virtual Chassis technology, allowing up to 10 interconnected switches to function as a unified entity, streamlining management and reducing overhead costs. Furthermore, the switch is built on Juniper’s cloud-grade architecture and ships with Junos OS, ensuring always-on reliability. Not only does it offer wire-speed performance, but it also has eight quality of service (QoS) queues per port, meaning critical traffic like voice and video can be prioritized effectively.

In today’s data-driven world, security is paramount. The EX4300-48T-AFI addresses this with support for link-layer data confidentiality and integrity through Media Access Control Security (MACsec), allowing you to encrypt all sensitive data that travels across the network.

The switch’s design is not only innovative but also cost-effective, providing new architecture options that minimize cost and complexity, while allowing for easy scalability. This makes the EX4300-48T-AFI an excellent long-term investment for businesses looking to optimize their networks without sacrificing performance or reliability.

Consolidated system monitoring through unified management and automation tools adds another layer of convenience, making the Juniper EX4300-48T-AFI an essential component for any organization striving for a robust, secure, and efficient network. Whether for immediate performance boosts or future-proofing your setup, this Juniper switch delivers versatility and value.

EX4300-48T-AFI is a Juniper EX4300 switch with 48-port 10/100/1000BASE-T + 350 W AC PS (back-tofront airflow) (QSFP+ DAC for Virtual Chassis ordered separately). EX4300 1 Gigabit Ethernet (1GbE) switches are compact, fixed-configuration platforms that can be deployed as standalone systems or as part of a Virtual Chassis, Virtual Chassis Fabric, or Junos Fusion switching architecture, satisfying a variety of high-performance campus and data center access needs.

Quick Spec

Table 1 shows the quick spec.



Backplane speed

320 Gbps (Virtual Chassis)

Data rate

496 Gbps


369 Mpps (wire speed)

40GBASE quad small form-factor pluggable plus transceiver (QSFP+) port densities

4 per switch

Up to 20 in Virtual Chassis configuration (assuming 2 ports per switch are used for forming Virtual Chassis)

Dimensions (W x H x D)

17.4 x 1.7 x 16.4 in (44.2 x 4.3 x 41.7 cm)

1 rack unit

Product Details

Juniper EX4300 switches provide these features:

1. Field-Proven Juniper Technology

A cloud-grade architecture, coupled with the Junos OS, enables EX Series switches to provide always-on reliability for every application.

2. Wire-Speed Performance

Wire-speed performance at high 1GbE, 10GbE, and 40GbE port densities dramatically simplifies network topologies and operations.

3. Eight QoS Queues

Eight QoS queues per switch port ensure proper prioritization of voice, video, and multiple levels of data traffic, with room to converge other networks, such as building automation and video security systems.

4. Innovative Switch Design

Innovative, cost-effective switch design enables new architectures that reduce cost and complexity, while unified management and automation tools consolidate system monitoring.

5. Virtual Chassis

Virtual Chassis technology allows multiple interconnected switches to operate as a single logical device, reducing operational expenses and simplifying management.

6. Near Line-Rate Encryption

Support for IEEE 802.1ae Media Access Control Security (MACsec) for link-layer data confidentiality, data integrity, and data origin authentication enables 88 Gbps of near line-rate, hardware-based traffic encryption on all 1GbE and 10GbE ports.

Compare to Similar Items

Table 2 shows the comparison.





48-port 10/100/1000BASE-T + 350 W AC PS (QSFP+ DAC for Virtual Chassis ordered separately)

48-port 10/100/1000BASE-T + 350 W AC PS (back-tofront airflow) (QSFP+ DAC for Virtual Chassis ordered separately)

Backplane speed

320 Gbps (Virtual Chassis)

320 Gbps (Virtual Chassis)

Data rate

496 Gbps

496 Gbps


369 Mpps (wire speed)

369 Mpps (wire speed)

Dimensions (W x H x D)

17.4 x 1.7 x 16.4 in (44.2 x 4.3 x 41.7 cm)

1 rack unit

17.4 x 1.7 x 16.4 in (44.2 x 4.3 x 41.7 cm)

1 rack unit

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Experience the Power of Juniper EX4300-48T-AFI with Northland Systems

High-Quality and Cost-Effective Solution

Achieve a perfect blend of performance and economy with the EX4300-48T-AFI from Juniper EX4300 Series Ethernet Switches. Northland Systems ensures you gain access to premium quality network equipment without straining your budget. Their 100% Low Price Guarantee affirms you’re getting top-tier technology affordably.

Comprehensive Support at No Extra Charge

Northland Systems understands the value of support in network management. By purchasing your EX4300-48T-AFI, you benefit from free expert CCIE technical support. This means reliable, professional guidance across multiple channels, enabling seamless network integration and management.

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Whether new sealed or used/refurbished, all Northland Systems’ Juniper Switches are guaranteed to be authentic and in the stated condition. Thorough testing by Cisco-certified engineers is standard, ensuring you receive a reliable, high-functioning product.

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Their unwavering commitment to customer satisfaction is evident through a 100% Money-Back Guarantee. This policy enforces a trust-centric relationship, allowing you to invest in the Juniper EX4300 Series Ethernet Switches with utmost confidence.

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Leverage the advantages of dealing with a seasoned industry expert. Northland Systems has established a robust track record since 1997. Enjoy substantial discounts on your purchase, combining economic efficiency with renowned reliability.

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Selecting pre-owned hardware from Northland Systems unlocks several advantages:

  • Substantial cost savings
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  • Contribution to environmental sustainability
  • Availability of legacy parts, ensuring long-term network stability

With Northland Systems, choose a network equipment provider that stands by every sale, offering the powerful Juniper EX4300-48T-AFI with confidence-inspiring policies and support.

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Juniper EX4300-48T-AFI Ethernet switch with 48 10/100/1000BASE-T ports, Virtual Chassis capability

EX4300-48T-AFI – Juniper EX4300 Series Ethernet Switches

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