The Juniper Networks EX4300 Switches are fixed-configuration Ethernet platforms designed to support high-performance enterprise campus, branch, and data center access environments.

The series combines the reliability associated with modular switching systems with the flexibility and economics of stackable platforms. EX4300 switches are available with standard 1GbE access connectivity as well as multigigabit configurations for environments that require higher access speeds.

Selected models support:

• IEEE 802.3af PoE
• IEEE 802.3at PoE+
• Up to 30W per PoE port
• Multigigabit Ethernet
• 10GbE and 40GbE connectivity
• Virtual Chassis
• Juniper Mist cloud management

Cloud-Ready Access Switching

The EX4300 is cloud-ready and supports Zero-Touch Provisioning (ZTP).

Through Juniper Mist Wired Assurance, organizations can:

• Onboard switches
• Configure devices
• Monitor network performance
• Troubleshoot connected devices
• Manage switches from the cloud

The Juniper Mist Cloud also helps simplify campus fabric deployment and management, while Mist AI improves visibility into the performance of connected devices.

Features and Benefits

Juniper Mist Wired Assurance

Juniper Mist Wired Assurance allows administrators to claim, configure, and troubleshoot EX4300 switches through a centralized cloud-based platform.

The EX4300 provides rich streaming telemetry that can be used for:

• Switch health monitoring
• Anomaly detection
• Service-Level Expectations
• Connected-device experience analysis

AI-powered automation and insights can help streamline IT operations and reduce Mean Time to Repair.

Virtual Chassis

Juniper Virtual Chassis technology allows multiple EX4300 switches to operate as a single logical system.

Up to:

• 10 EX4300 switches

can be interconnected and managed as one logical device.

The platform can also support a combination of:

• EX4300 switches
• EX4600 switches

within the same Virtual Chassis environment.

This provides a scalable architecture for:

• 1GbE networks
• Mixed 1GbE/10GbE environments
• Mixed 1GbE/10GbE/40GbE environments

MACsec Support

EX4300 switches support:

• IEEE 802.1AE MACsec

MACsec provides link-layer:

• Data confidentiality
• Data integrity
• Data-origin authentication

This helps protect traffic passing across supported network links.

12 QoS Queues

Each EX4300 switch port provides:

• 12 Quality of Service queues

These queues support multilevel, end-to-end traffic prioritization across the network.

High-Performance and Scalable Switching

The EX4300 family provides a full set of Layer 2 and Layer 3 switching capabilities for a variety of network deployments.

Typical environments include:

• Campus access
• Branch offices
• Data center access
• Aggregation
• Small core deployments

Organizations can begin with a single 24-port or 48-port switch and expand as connectivity requirements increase.

With Virtual Chassis technology, up to 10 EX4300 and EX4600 switches can operate together as a single logical device.

Fiber Aggregation

A pair of 32-port EX4300 fiber switches can also be deployed as:

• Consolidated aggregation switches
• Small core switches

This provides an additional option for fiber-based enterprise networks.

Integration with QFX5100

The EX4300 can also integrate with Juniper Networks QFX5100 Series 10GbE and 40GbE data center access switches.

This allows the switches to operate together in a single stack or Virtual Chassis configuration, helping simplify:

• Mixed access environments
• 10GbE server upgrades
• Centralized management

320 Gbps Virtual Chassis Backplane

EX4300 switches can be interconnected using multiple:

• 40GbE QSFP+ ports

This creates a Virtual Chassis backplane of up to:

• 320 Gbps

An optional flexible uplink module also provides:

• 1GbE connectivity
• 10GbE connectivity

These uplinks can be used to connect EX4300 access switches to aggregation or core switching layers.

High Availability

EX4300 switches include several high-availability features typically associated with chassis-based switching platforms.

These include:

• Hot-swappable fans
• Redundant internal power supplies
• Hot-swappable power supplies
• Modular Junos operating system
• Dual Routing Engines in Virtual Chassis deployments
• Graceful Routing Engine Switchover
• Single management interface
• Centralized software upgrades

These features help improve network availability while simplifying ongoing administration.

Power over Ethernet

PoE-enabled EX4300 models support:

• IEEE 802.3at PoE+

Selected models can provide up to:

• 30W per port

PoE can be used to power compatible devices such as:

• IP phones
• Wireless access points
• Other Ethernet-powered devices

EX4300 Multigigabit

The EX4300 family also includes the EX4300-48MP multigigabit switch.

This model supports IEEE 802.3bz-compliant access speeds including:

• 100 Mbps
• 1 Gbps
• 2.5 Gbps
• 5 Gbps
• 10 Gbps

This higher bandwidth can support devices such as 802.11ac Wave 2 wireless access points.

The EX4300-48MP can also provide up to:

• 95W of power per supported access port

for higher-power PoE++ devices.

MACsec AES-256

The EX4300-48MP provides:

• MACsec AES-256 encryption

across supported access and uplink interfaces.

Dedicated 40GbE Connectivity

The EX4300-48MP includes:

• 4 dedicated 40GbE QSFP+ ports

These interfaces can be used to create the:

• 320 Gbps Virtual Chassis backplane

Chassis-Like Features in a Stackable Platform

The EX4300 combines fixed-configuration switching with several chassis-like capabilities.

The platform can scale from:

• 24 to 480 x 10/100/1000BASE-T ports
• 24 to 240 x 100/1000/2500/5000/10000BASE-T ports

The family can also support up to:

• 40 x 10GbE uplinks
• 40 x 40GbE uplinks

Multigigabit configurations can support up to:

• 40 x 10GbE uplinks
• 20 x 40GbE uplinks
• 20 x 100GbE uplinks

in addition to dedicated Virtual Chassis connectivity.

Junos Operating System

Each EX4300 switch includes:

• ASIC-based Packet Forwarding Engine
• Integrated Routing Engine

The Routing Engine provides control-plane functionality, while the Packet Forwarding Engine handles network traffic forwarding.

The EX4300 uses the same modular Junos operating system used across other Juniper:

• Switches
• Routers
• Security platforms

This provides a consistent operational environment across the Juniper infrastructure.

EX4300-24T

The EX4300-24T provides:

Access Ports

• 24 x 10/100/1000BASE-T ports

PoE

• No PoE
• 0W PoE budget

10GbE

• 0 native ports
• Up to 4 ports with optional module

40GbE

• 4 x 40GbE ports

100GbE

• No 100GbE ports

Power Supply

• 350W AC

Airflow

• AFO front-to-back airflow

EX4300-24P

The EX4300-24P provides:

Access Ports

• 24 x 10/100/1000BASE-T ports

PoE

• 24 PoE/PoE+ ports
• 550W PoE budget

10GbE

• Up to 4 ports with optional module

40GbE

• 4 x 40GbE ports

100GbE

• No 100GbE ports

Power Supply

• 715W AC

Airflow

• AFO front-to-back airflow

EX4300-48T

The EX4300-48T provides:

Access Ports

• 48 x 10/100/1000BASE-T ports

PoE

• No PoE
• 0W PoE budget

10GbE

• Up to 4 ports with optional module

40GbE

• 4 x 40GbE ports

100GbE

• No 100GbE ports

Power Supply

• 350W AC

Airflow

• AFO front-to-back airflow

EX4300-48P

The EX4300-48P provides:

Access Ports

• 48 x 10/100/1000BASE-T ports

PoE

• 48 PoE/PoE+ ports
• 900W PoE budget

10GbE

• Up to 4 ports with optional module

40GbE

• 4 x 40GbE ports

100GbE

• No 100GbE ports

Power Supply

• 1100W AC

Airflow

• AFO front-to-back airflow

EX4300-48T-AFI

The EX4300-48T-AFI provides:

• 48 x 10/100/1000BASE-T access ports
• No PoE
• 0W PoE budget
• Up to 4 x 10GbE ports with optional module
• 4 x 40GbE ports
• No 100GbE ports
• 350W AC power supply
• AFI back-to-front airflow

EX4300-48T-DC

The EX4300-48T-DC provides:

• 48 x 10/100/1000BASE-T ports
• No PoE
• 0W PoE budget
• Up to 4 x 10GbE ports with optional module
• 4 x 40GbE ports
• No 100GbE ports
• 550W DC power supply
• AFO front-to-back airflow

EX4300-48T-DC-AFI

The EX4300-48T-DC-AFI provides:

• 48 x 10/100/1000BASE-T ports
• No PoE
• 0W PoE budget
• Up to 4 x 10GbE ports with optional module
• 4 x 40GbE ports
• No 100GbE ports
• 550W DC power supply
• AFI back-to-front airflow

EX4300-48MP

The EX4300-48MP is the multigigabit configuration within the EX4300 family.

Access Ports

The switch provides:

• 24 x 10/100/1000BASE-T ports
• 24 x 100/1000/2500/5000/10000BASE-T ports

PoE

• 48 PoE/PoE+ ports
• 1100W PoE budget

10GbE

• 24 native 10GbE-capable ports
• Up to 28 ports with module

40GbE

• 4 native 40GbE ports

100GbE

• Up to 2 ports with optional module

Power Supply

• 1400W AC

Airflow

• AFO front-to-back airflow

EX4300-32F

The EX4300-32F provides a fiber-based configuration.

Access Ports

• 32 x 100/1000BASE-X ports

PoE

• No PoE
• 0W PoE budget

10GbE

• 4 native ports
• Up to 12 ports with optional module

40GbE

• 2 native ports
• Up to 4 ports with optional module

100GbE

• No 100GbE ports

Power Supply

• 350W AC

Airflow

• AFO front-to-back airflow

EX4300-32F-DC

The EX4300-32F-DC provides:

• 32 x 100/1000BASE-X fiber ports
• No PoE
• 0W PoE budget
• 4 native 10GbE ports
• Up to 12 x 10GbE ports with optional module
• 2 native 40GbE ports
• Up to 4 x 40GbE ports with optional module
• No 100GbE ports
• 550W DC power supply
• AFO front-to-back airflow

EX4300 Platform Specifications

Form Factor

• 1RU

Port Density

The EX4300 platform supports:

• 1GbE access connectivity
• SFP+ uplink options
• QSFP+ uplink options

Power

PoE-enabled models support:

• PoE
• PoE+
• Up to 30W per port

Switching Capacity

The EX4300 provides:

• 496 Gbps switching capacity

Fabric

The platform supports:

• Virtual Chassis

Scalable Switching for Campus, Branch, and Data Center Networks

The Juniper EX4300 Switches provide a flexible switching platform for enterprise campus, branch, aggregation, and data center access environments.

With 24- and 48-port copper models, fiber configurations, multigigabit connectivity, PoE+, 40GbE uplinks, a 320 Gbps Virtual Chassis backplane, Juniper Mist cloud management, MACsec security, and support for up to 10 switches in a single logical system, the EX4300 family provides a scalable foundation for growing enterprise networks.