EX4300-48T - Juniper EX4300 Series Ethernet Switches Overview
EX4300-48T - Juniper EX4300 Series Ethernet Switches is a genuine campus and data-center switching product from Juniper, a specialist in high-performance routing and switching, trusted in service-provider and large-enterprise networks. Belonging to the Juniper EX4300 Series family, the EX4300-48T unit is built to the original factory specification, so it integrates with existing Juniper deployments predictably and behaves exactly as the platform documentation describes. In the network, it is suited to access-layer and edge deployments, where reliable wiring-closet operation and straightforward management are the priorities.
From a specification standpoint, it offers 48 ports for client, server or uplink connectivity. These are the original factory figures for this model, giving administrators a clear picture of what the unit can deliver before it enters service. Standard mounting, cabling and management practices apply, so deployment follows the same procedures as other Juniper hardware already running in the environment.
Typical deployments include access-layer deployments for user, phone and AP connectivity, distribution and core aggregation in campus networks, and top-of-rack and end-of-row switching in data centers. Organizations commonly source it for refresh programs, capacity expansion and spares management, keeping a tested unit on hand so outages stay short and replacements are predictable. The factory detail for this unit reads: “EX4300, 48-Port 10/100/1000BaseT + 350W AC PS”. This makes it a practical choice when original-spec hardware is required at a predictable cost.
Every unit at LinkNewNet is inspected and tested before dispatch, and stock is graded, cleaned and verified for correct operation, including port status, console access and firmware state. Our warranty coverage and responsive technical support protect the purchase after it arrives, and our team can confirm revision levels and software compatibility before you order. For volume requirements we also offer configuration checks and staged delivery options.
Contact our sales team for current availability, lead time and shipping options for the EX4300-48T. We respond quickly with stock status and a firm quote, so you can plan the refresh or expansion with confidence.
Key Specifications
Applications
Enterprise Campus
High-density ports power users, phones and APs at the access layer.
Branch Office
Stackable units simplify branch deployment and management.
Wireless & IoT
PoE budget supports dense wireless and IoT endpoints.
Buying a Pre-Owned EX4300-48T
Verify the unit is tested, firmware confirmed, and condition documented. Every unit is fully tested and warranty covered. Contact our team for current stock and availability.
EX4300-48T Specification | |
Description | Juniper EX4300 switch with 48-port 10/100/1000BASE-T + 350 W AC PS (QSFP+ DAC for Virtual Chassis ordered separately) |
Form factor | Fixed platform |
Dimensions (W x H x D) | 17.4 x 1.7 x 16.4 in (44.2 x 4.3 x 41.7 cm) |
Backplane speed | 320 Gbps (Virtual Chassis) |
Data rate | 496 Gbps |
Throughput | 369 Mpps (wire speed) |
40GBASE quad small form-factor pluggable plus transceiver (QSFP+) port densities | 4 per switch |
100GBASE C form-factor pluggable transceiver (CFP) port densities | N/A |
Resiliency | Internal, hot-swappable redundant power supply; field-replaceable fans; graceful Routing Engine switchover (GRES) in Virtual Chassis configuration |
Operating system | Junos OS |
Traffic monitoring | sFlow |
Quality-of-service (QoS) queues/port | 12 |
MAC addresses | 64,000 |
Jumbo frames | 9216 bytes |
IPv4 unicast/multicast routes | 32,000/8000 |
IPv6 unicast/multicast routes | 18,000/4000 |
Number of VLANs | 4093 |
ARP entries | 64,000 |
EX4300-48T - Product Notes
This listing is a specific SKU variant of the EX4300-48T family. Review the specifications above and confirm compatibility with your existing infrastructure, including software version, mounting, and interface requirements, before ordering.
For volume requirements we offer configuration checks and staged delivery options. Our team can confirm revision levels, software compatibility, and lead time before you place an order.
Every unit at LinkNewNet is inspected and tested before dispatch, and stock is graded, cleaned and verified for correct operation.
EX4300-48T - Juniper Series Notes
This listing is part of the Juniper enterprise networking product family, sourced and tested by LinkNewNet for enterprise deployment. Juniper switch runs Junos OS and is typically deployed in campus access, aggregation, or data-center roles. It provides reliable Layer 2/3 switching for user, server and uplink connectivity, and integrates with Juniper Mist or CLI-based management.
Deployment guidance: When planning this EX4300-48T unit into a network, confirm the Junos OS version required, the power and cooling profile, and the upstream/downstream interface types that match your existing infrastructure. For a like-for-like refresh, match the feature set of the units already in service so management and automation behave consistently.
Our Juniper reconditioning process: Every pre-owned Juniper unit at LinkNewNet passes a documented reconditioning flow before dispatch - visual inspection, internal cleaning, firmware verification, port-by-port testing, and configuration reset to factory defaults. This ensures the unit you receive operates reliably and integrates cleanly with your existing Juniper management tools.
Related models in this family: EX8200-8XS, EX8208-SRE320, EX8208, EX4500-40F-VC1-BF, EX4200-48T. Compare specifications to confirm the right port density, feature set and uplink options for your deployment.
Model code: T = 10/100/1000BASE-T copper (RJ45) ports - this suffix indicates the feature set, power, or port type of the EX4300-48T, which affects software licensing and regional compliance.
