What is the switching performance of this model?

It delivers 496 Gbps switching capacity, 369 Mpps forwarding rate at wire speed, and 320 Gbps backplane speed in Virtual Chassis mode. Additional specs include 64,000 MAC addresses, 4,093 VLANs, 9,216-byte jumbo frames, and 12 QoS queues per port for prioritized traffic handling.

Does it support Virtual Chassis technology?

Yes, with a 320 Gbps backplane allowing up to 10 switches to interconnect as a single logical device using QSFP+ ports (up to 20 in configuration). Supports Virtual Chassis Fabric, Junos Fusion, and GRES for resilient switchover, simplifying management.

What are the power and environmental specs?

Includes a fixed 350W AC power supply with hot-swappable redundant option (120W max). Operates at 32°F to 104°F (0°C to 40°C) with front-to-back airflow. Dimensions are 17.4 x 1.7 x 16.4 in (1U), weight 9.5 lbs.

What processor and memory does it use?

Powered by a 1.5 GHz Dual-Core PowerPC CPU, 2 GB ECC DRAM, and 2 GB flash storage. Runs Junos OS for advanced Layer 3 features, sFlow monitoring, and management interfaces like Virtual Chassis Fabric.

What resiliency features are available?

Offers hot-swappable redundant power supplies, field-replaceable fans, and graceful Routing Engine switchover (GRES) in Virtual Chassis. These ensure high availability with minimal downtime in enterprise deployments.

EX4300-48T - Juniper EX4300-48T 48x1GbE 4x40G 496Gbps L3 Switch

Name: Juniper EX4300-48T 48x1GbE 4x40G 496Gbps L3 Switch
Brand: Juniper
SKU: EX4300-48T
Price: 1178 USD
Availability: InStock

EX4300-48T - Juniper EX4300-48T 48x1GbE 4x40G 496Gbps L3 Switch | US IT Hardware

Product overview

The Juniper EX4300-48T is a fixed-configuration Layer 3 Ethernet switch from the EX4300 Series, designed for enterprise campus and data center access. It features 48 x 10/100/1000BASE-T RJ-45 ports and 4 x 40GBASE QSFP+ uplinks, delivering 496 Gbps switching capacity and 369 Mpps forwarding rate at wire speed. With a 320 Gbps Virtual Chassis backplane, up to 10 units can interconnect as a single logical device, supporting Virtual Chassis Fabric and Junos Fusion. Powered by a 1.5 GHz Dual-Core PowerPC CPU, 2 GB ECC DRAM, and 2 GB flash, it runs Junos OS with management via sFlow and 12 QoS queues per port. Physical specs include 1U rack-mount form factor (17.4 x 1.7 x 16.4 in, 9.5 lbs), front-to-back airflow, and hot-swappable redundant 350W AC power supplies (120W max). Resiliency includes field-replaceable fans and GRES. Supports 64,000 MAC addresses, 4,093 VLANs, and 9,216-byte jumbo frames for high-performance, scalable deployments.

48x 1GbE RJ-45 + 4x 40G QSFP+ ports for dense access
496 Gbps switching, 369 Mpps forwarding at wire speed
320 Gbps Virtual Chassis for up to 10-unit stacking
Hot-swappable redundant power, field-replaceable fans
Junos OS, 12 QoS queues/port, sFlow monitoring
64K MAC, 4,093 VLANs, 9,216-byte jumbo frames

Expedited and overnight shipping options are available at checkout, priced by destination and service.
Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Resiliency Features
Manufacturer part #	EX4300-48T
Brand	Juniper
Condition	New
Model	EX4300-48T
Jumbo Frames	9,216 bytes
Product Line	EX4300 Series
Product Type	Fixed-configuration Ethernet Switch
Number of VLANs	4,093
Operating System	Junos OS
MAC Address Table	64,000 addresses
QoS Queues per Port	12

Compatible systems

No specific server/system or OS compatibility lists found in sources; operates with Junos OS on Virtual Chassis configurations up to 10 switches.

Best for

Campus Access
Provides 48 x 1GbE ports with 496 Gbps switching and 369 Mpps forwarding for high-density user connectivity in enterprise campuses, scalable via 320 Gbps Virtual Chassis.
Data Center Top-of-Rack
4 x 40G QSFP+ uplinks and 64,000 MAC table support wire-speed Layer 3 routing for server access, with Junos OS for advanced QoS (12 queues/port).
Branch Office
Compact 1U design with redundant power and GRES ensures reliability; supports 4,093 VLANs and 9,216-byte jumbo frames for secure, efficient branch networking.
Enterprise Aggregation
Virtual Chassis Fabric interconnects up to 10 switches, delivering carrier-class resiliency with hot-swappable fans and power supplies for aggregated uplinks.

Backplane Speed	320 Gbps (Virtual Chassis)
Forwarding Rate	369 Mpps (wire speed)
Switching Capacity	496 Gbps

Max Wattage	120W maximum
Voltage Input	AC input: 100-240V, 50-60Hz
Power Supplies	350 W AC fixed power supply; Internal hot-swappable redundant power supply option

Weight	9.5 lbs (4.3 kg)
Dimensions	17.4 x 1.7 x 16.4 in (44.2 x 4.3 x 41.7 cm)
Rack Units	1 RU
Form Factor	1U rack-mountable fixed switch
Mounting Type	Rack mount

Airflow	Front-to-back airflow
Operating Temperature	32°F to 104°F (0°C to 40°C)

Console Port	1 x RJ-45
Ethernet Ports	48 x 10/100/1000BASE-T RJ-45 ports; 4 x 40GBASE QSFP+ ports

Juniper EX4300-48T 48x1GbE 4x40G 496Gbps L3 Switch

Product overview

Featuring

Compatible systems

Best for

Frequently asked questions

Details

Shipping, warranty & returns

Customer reviews

Storage

Processor

Network & Communication

Power Consumption

Physical Characteristics

Environmental

Interface/Ports

DRAM	2 GB with Error Correcting Code (ECC)
Flash	2 GB