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.