Juniper EX4300-48T 48-Port Gigabit RJ-45 Switch 4x QSFP+ 40G Uplinks 1U

Juniper EX4300-48T — 48-Port GbE Access Switch with 4x QSFP+ 40GbE

Technical Identity

The Juniper Networks EX4300-48T is a fixed-configuration 1U Ethernet access switch with 48x 10/100/1000BASE-T (RJ-45) ports and 4x QSFP+ 40GbE ports. Per the Juniper EX4300 datasheet, the platform delivers 496 Gbps (bidirectional) switching capacity and up to 369 Mpps forwarding, runs Junos OS, and its QSFP+ ports operate by default as Virtual Chassis ports (VCPs) forming a 320 Gbps interconnect. Condition: Refurbished.

Specifications

• Brand: Juniper Networks
• Model / MPN: EX4300-48T
• Product type: Layer 2/3 Ethernet access switch
• Product family: Juniper EX4300 line
• Access ports: 48x 10/100/1000BASE-T RJ-45
• Uplink / VCP ports: 4x QSFP+ 40GbE (Virtual Chassis ports by default)
• Switching capacity: 496 Gbps bidirectional / 248 Gbps unidirectional (per datasheet)
• Forwarding rate: up to 369 Mpps
• MAC table: 64,000 entries
• Form factor: 1U rack-mount
• Operating system: Junos OS
• Virtual Chassis: up to 10 members
• Condition: Refurbished

Engineering Context

The EX4300 line is designed for standalone access or stacked operation: up to 10 switches interconnect over the QSFP+ VCPs into a single managed Virtual Chassis with a 320 Gbps backplane, and the platform also participates in Virtual Chassis Fabric and Junos Fusion architectures. The -48T suffix denotes the 48-port, non-PoE copper model of the line. Juniper lists a 350 W AC power supply for the copper EX4300 models.

Use Cases

• High-density campus and branch access for 1GbE desktops, phones, and access points
• Server access at 1GbE with 40GbE aggregation over the QSFP+ ports
• Virtual Chassis stacks of up to 10 members managed as one logical device
• Collapsed distribution in small and mid-size networks requiring L3 at the edge

What This Is NOT

• NOT a PoE switch. Inline power requires the EX4300-48P variant; the -48T provides no PoE.
• NOT a 10GbE access switch. The 48 access ports are 1GbE RJ-45. SFP+ 10GbE requires an optional EX4300 uplink module (not included) or a different platform.
• NOT the multigigabit EX4300-48MP. This is the standard 1GbE copper model.
• NOT a QSFP28 / 100GbE platform. The four QSFP+ ports are 40G and default to Virtual Chassis (VCP) mode.
• NOT supplied with transceivers, DAC cables, uplink modules, or rack accessories unless explicitly stated in the listing.
• NO Juniper software licenses or support contracts are included or transferred; advanced Junos features may require Juniper feature licenses per Juniper policy.

Compatibility & Hard Constraints

• Typical deployment: standalone access switch or Virtual Chassis with other EX4300 members (mixed-VC rules per Juniper documentation).
• Optics and cables: Juniper-qualified QSFP+ transceivers and DACs for the 40G ports; verify against the EX4300 hardware compatibility list.
• Port mode: QSFP+ ports ship in VCP mode; use as 40GbE network uplinks requires explicit Junos configuration.
• Lifecycle: Juniper has announced end of life for the EX4300 line (published EOL trackers list EOL 2022 and end of support 2029) — verify current support status before deployment.
• Pre-deployment verification: confirm Junos release, feature licensing, and power option against the unit label.

Frequently Asked Questions (FAQ)

Q. What is the Juniper EX4300-48T?
The EX4300-48T is a 1U Juniper EX4300-line access switch with 48x 10/100/1000BASE-T RJ-45 ports and 4x QSFP+ 40GbE ports, rated at 496 Gbps bidirectional switching capacity and up to 369 Mpps, running Junos OS.

Q. Can the 4x QSFP+ ports on the EX4300-48T be used as 40GbE uplinks?
By default the QSFP+ ports operate as Virtual Chassis ports (VCPs). They can be converted to network (uplink) ports through Junos configuration; verify the procedure for your Junos release.

Q. Does the EX4300-48T provide PoE?
No. The -48T model provides no inline power. PoE/PoE+ is available on the EX4300-48P variant.

Q. How many EX4300-48T switches can form a Virtual Chassis?
Up to 10 EX4300 switches can be interconnected over the QSFP+ VCPs and managed as a single logical device with a 320 Gbps backplane.

Q. Are Junos licenses included with this EX4300-48T?
No license or support entitlement is included or claimed. Advanced Junos features may require Juniper feature licenses purchased separately per Juniper policy.

Q. What condition is the EX4300-48T supplied in by T.E.S IT-SOLUTIONS?
Refurbished. Each EX4300-48T is tested where test topology is available, inspected, and professionally packed. EU stock with global B2B shipping. Multiple units available.

Why T.E.S IT-SOLUTIONS

Every EX4300-48T unit ships with: (1) functional testing where test topology is available, (2) configuration wipe and inspection, (3) full cosmetic check, (4) professional anti-static packaging, (5) global B2B shipping from EU stock, (6) technical consultation for network design at no extra cost.

Condition: Refurbished. Bench-tested where test topology is available, inspected, and professionally packed by T.E.S IT-SOLUTIONS. EU stock, global B2B shipping. See tes-itsolutions.com.