Juniper EX4300 Series Switches (Used & Refurbished)
The Juniper EX4300 Series delivers flexible, stackable campus and aggregatio...
Juniper EX4300 Series Switches (Used & Refurbished)
The Juniper EX4300 Series delivers flexible, stackable campus and aggregation switching with 1GbE access, 10GbE and 40GbE uplinks, and Juniper’s proven Junos OS. BrightStar Systems supplies fully tested, used and refurbished EX4300 switches backed by our 1-Year In-House Warranty, helping you upgrade or expand your network at a fraction of new hardware cost.
With options for PoE+, non-PoE, copper, and SFP+ fiber models, the EX4300 family is ideal for enterprise access, small data center top-of-rack deployments, and high-density wiring closets that need Virtual Chassis scalability.
Juniper EX4300 Series Overview
The EX4300 Series combines high-performance Layer 2/Layer 3 switching with Juniper’s Virtual Chassis technology, allowing multiple switches to operate as a single, logical device. This simplifies management and scaling while delivering resilient campus and aggregation designs.
Key features of the EX4300 Series include:
1GbE access ports with 10GbE SFP+ and 40GbE QSFP+ uplink options
PoE+ models for IP phones, wireless access points, and cameras
Virtual Chassis technology for stacking and simplified management
Advanced Layer 2/Layer 3 features, including OSPF, BGP, and IPv6
Compact 1RU form factors for space-constrained wiring closets
If you need similar campus switches with Mist integration and multigigabit support, consider the newer EX4400 Series alongside EX4300 in your design.
Explore More Juniper Switches
EX4300 switches are part of the broader Juniper EX and QFX portfolios. Many networks combine EX4300 at the access layer with QFX data center switches or MX routers at the core.
All Juniper EX Series Switches
Juniper QFX Series (Data Center)
Juniper MX Series Routers
Juniper SRX Firewalls
All Juniper Network Hardware
Related Juniper Switch & Firewall Series
Customers often evaluate the EX4300 alongside other Juniper campus and data center families. Use the links below to compare roles, capacity, and feature sets.
Juniper EX2300 Series – Compact access for branch and small wiring closets
Juniper EX3400 Series – Compact campus access
Juniper EX4400 Series – Next-generation campus with Mist integration
Juniper EX4650 Series – High-performance distribution and aggregation
Juniper QFX5100 Series – 10GbE data center ToR
Juniper QFX5120 Series – 25GbE leaf with 100GbE uplinks
Juniper QFX5200 Series – High-density 25/100GbE switching
Juniper SRX Series Firewalls – Secure branch and perimeter
Comparing Juniper EX4300 to Arista 7000 Series Switches
Some networks standardize on a single vendor, while others compare Juniper EX4300 switches with Arista 7000-series platforms for access or leaf roles. BrightStar Systems supplies both Juniper and Arista hardware and can help you evaluate which platform best fits your design.
Arista 7050X Series – 10/40GbE data center and campus aggregation
Arista 7060X Series – High-density 25/100GbE leaf-spine switching
Arista 7280 Series – Deep-buffered switches for data center and service provider networks
Our engineers can walk through Junos OS versus Arista EOS, optics compatibility, and long-term operating costs to help you decide between Juniper EX and Arista 7000-series platforms.
Popular Juniper EX4300 Models
Below are some of the most frequently purchased EX4300 switches from BrightStar Systems, all fully tested and backed by our in-house warranty.
EX4300-48P – 48× 1GbE PoE+ ports with 10GbE/40GbE uplinks, ideal for high-density access closets.
EX4300-48P-S – 48-port PoE+ Layer 3 switch with Virtual Chassis support and 10GbE SFP+ uplinks.
EX4300-48P-TAA – TAA-compliant 48-port PoE+ EX4300 for government and regulated environments.
EX4300-24T – 24× 1GbE copper ports, perfect for smaller wiring closets and branch deployments.
EX4300-48T-S – 48× 1GbE non-PoE copper ports with advanced L3 capabilities.
EX4300-32F-S – 32× 10GbE SFP+ fiber ports for fiber-rich or aggregation roles.
EX4300-48T-DC-AFI – 48× 1GbE copper ports with DC power and front-to-back airflow for telco or data center environments.
Juniper EX4300 Technical Specs & Architecture
The EX4300 line is built for high-performance campus and branch access with wire-speed Layer 2 and Layer 3 forwarding and a nonblocking architecture. In many networks, EX4300 switches provide the user-facing edge while uplinking into MX routers or QFX leaf-spine fabrics.
Switching capacity: model-dependent, designed for line-rate forwarding on all access and uplink ports.
Virtual Chassis: stack up to 10 EX4300 switches as a single logical device for simplified management and resilient designs.
Layer 2/Layer 3 features: robust Junos OS feature set including VLANs, QinQ, Spanning Tree, OSPF, BGP, static routing, and IPv6.
Resiliency: redundant power options on select models and support for hitless upgrades and graceful restart in the right software trains.
Management: out-of-band management ports, console access, and integration with Junos Space and cloud-based management platforms.
EX4300 Model Details
EX4300-48P & EX4300-48P-S
48× 10/100/1000BASE-T PoE+ access ports
Uplink options with 10GbE SFP+ and 40GbE QSFP+
Ideal for powering IP phones, wireless APs, and cameras at the edge
Virtual Chassis for stacking and simplified management
EX4300-48P-TAA
TAA-compliant version of the EX4300-48P for regulated environments
48× PoE+ access ports with high PoE budget
Designed for government, education, and secure facilities
EX4300-24T & EX4300-48T-S
24 or 48× 10/100/1000BASE-T non-PoE access ports
Suitable for user access, management networks, or low-power devices
Advanced Layer 2/Layer 3 feature set with Junos OS
EX4300-32F-S
32× 10GbE SFP+ fiber ports
Designed for fiber-rich access, distribution, or aggregation layers
Fits small data center or high-performance campus core roles
EX4300-48T-DC-AFI
48× 1GbE copper ports with DC power input
Front-to-back airflow for data center or telco racks
Good fit for environments standardizing on DC power
Compatible Optics & Uplink Modules
EX4300 switches support a wide range of uplink modules and optics for flexible connectivity. BrightStar Systems can bundle optics and modules with your EX4300 order.
Juniper SFP/SFP+/QSFP Transceivers & Cables
10GbE SFP+ optics for uplinks to distribution or core
40GbE QSFP+ optics for stacking or core interconnects
DAC and AOC cables for short-reach links
EX Series uplink modules such as EX-UM and QSFP modules (see our EX Series Module Guide for compatibility details)
Common Juniper EX4300 Use Cases
Campus access switching for user devices, VoIP phones, and Wi-Fi access points
Branch office aggregation where Virtual Chassis simplifies multi-switch deployments
Small data center top-of-rack using EX4300-32F-S or 10GbE-uplink EX4300 models
Management and out-of-band networks using non-PoE EX4300-24T or EX4300-48T-S
Regulated or TAA-sensitive environments with EX4300-48P-TAA models
Why Buy Used or Refurbished EX4300 Switches?
Buying used EX4300 switches from BrightStar Systems can reduce project costs without sacrificing reliability. Our in-house testing and warranty help ensure predictable behavior in production environments.
40–80% savings versus new Juniper EX4300 pricing
Shorter lead times than many new-hardware channels
Fully tested, cleaned, and reset to factory defaults
Backed by our 1-Year In-House Warranty
How We Test Refurbished EX4300 Switches
Every EX4300 switch we ship goes through a documented test process in our lab before it reaches your rack.
Power-on and POST verification with known-good optics and cables.
Port testing on access and uplink ports, including sample PoE loads on EX4300-48P models.
Verification of Virtual Chassis stacking ports where applicable.
Junos OS load, configuration reset to factory defaults, and cleanup of any residual data.
Visual inspection, cleaning, and labeling so hardware arrives ready to install.
All EX4300 switches are backed by our 1-Year In-House Warranty for added peace of mind.
EX4300 Lifecycle, Support, and Replacement Planning
The EX4300 has been a workhorse in Juniper campus and aggregation networks for years. Many customers continue to standardize on EX4300 at the access layer while introducing newer EX4400 and EX4650 platforms as part of phased refresh cycles.
Lifecycle stage: mature platform with a long track record in production environments.
Software support: Junos OS feature and security updates remain available in supported release trains for the EX4300 family.
Refresh options: EX4400 for newer hardware and Mist-native integration, EX4650 or QFX5100/QFX5120 for higher-performance aggregation and data center roles.
Mixed environments: many enterprises run EX4300 side-by-side with EX4400 and QFX leaf-spine fabrics during upgrades.
EX4300 Buy-Back and Trade-In Options
If you are decommissioning EX4300 switches, BrightStar Systems can help you recover value and simplify asset disposition.
Fast bids on surplus EX4300 and related Juniper hardware.
Support for full rack or site decommissioning projects.
Option to trade in EX4300 inventory toward newer EX4400, EX4650, or QFX platforms.
Contact our team with an inventory list to get a buy-back or trade-in quote.
EX4300 Expertise from Juniper-Focused Network Engineers
BrightStar Systems is more than a hardware broker. Our team works with Juniper EX, QFX, and MX platforms every day in real data center and campus designs.
Experience designing EX4300 deployments in enterprise, education, and service provider networks.
Guidance on Virtual Chassis design, uplinks into MX or QFX cores, and migration paths to EX4400 or QFX leaf-spine fabrics.
Assistance matching optics, power supplies, and airflow SKUs such as EX4300-48T-DC-AFI to your existing standards.
If you have questions about how an EX4300 will fit into your architecture, our engineers can walk through the design with you before you buy.
FAQ – Juniper EX4300 Series
Q: Can EX4300 switches be stacked in a Virtual Chassis?
Yes. EX4300 switches support Juniper Virtual Chassis technology, allowing multiple EX4300 units to operate as a single, logical device. This simplifies management and scaling for campus and aggregation designs.
Q: What uplink speeds are available on the EX4300?
Depending on the model and modules installed, EX4300 switches support 10GbE SFP+ uplinks and 40GbE QSFP+ ports, which can be used for uplinks, stacking, or core interconnects.
Q: Should I choose EX4300 or EX4400 for a new deployment?
The EX4300 remains a solid choice for cost-optimized campus and aggregation roles. The EX4400 adds newer hardware, EVPN-VXLAN enhancements, and tighter Mist integration. Many customers mix EX4300 and EX4400 depending on budget, feature needs, and lifecycle plans.
Q: Do you buy used EX4300 hardware?
Yes. BrightStar Systems actively buys used EX4300 switches and related Juniper hardware. If you are decommissioning EX4300 equipment, we can provide bids and help you recover value from surplus gear.
Q: How many EX4300 switches can I stack in a Virtual Chassis?
EX4300 switches support stacking multiple units in a Virtual Chassis configuration, allowing you to scale out ports while managing them as a single device. Design limits depend on software and topology, and our team can help you plan the right size for your environment.
Q: What optics are supported on EX4300 uplink ports?
EX4300 uplink slots support a range of Juniper SFP, SFP+, and QSFP+ optics and DAC/AOC cables. Compatibility depends on the specific model and software version, so we recommend reviewing Juniper’s optics compatibility list or contacting us for guidance.
Q: What airflow options are available on EX4300 models?
Some EX4300 models, such as the EX4300-48T-DC-AFI, are designed with specific airflow directions suitable for data center or telco racks. When you request a quote, we can help ensure the airflow and power characteristics match your standards.
Q: Are used EX4300 switches suitable for production networks?
Yes. Many customers deploy used and refurbished EX4300 switches in production campus and branch networks. Our lab testing, cleaning, and warranty coverage are designed to make used EX4300 hardware a reliable option for critical environments.
Q: How quickly can you ship EX4300 switches?
Lead times will vary based on inventory and configuration, but used and refurbished EX4300 switches are often available for rapid shipment compared to new hardware channels. Request a quote for current availability and shipping timelines.
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