The Juniper Networks EX3400 Ethernet Switches provide a cost-effective and scalable access switching platform for demanding enterprise data, voice, and video networks.

Designed in a compact fixed-configuration 1U form factor, the EX3400 Series delivers the performance, management capabilities, high availability, and network flexibility traditionally associated with higher-end access switches.

The EX3400 is also cloud-ready and Zero-Touch Provisioning enabled, allowing organizations to onboard, configure, monitor, and manage their switches through Juniper Mist Wired Assurance.

Cloud-Ready Enterprise Access Switching

The EX3400 integrates with the Juniper Mist Cloud, simplifying switch deployment and ongoing network management.

Through Juniper Mist Wired Assurance, administrators can:

• Claim switches
• Configure devices
• Monitor network performance
• Troubleshoot connectivity
• Improve connected-device experiences

Mist AI also provides greater visibility into the performance and behavior of devices connected to the network.

Features and Benefits

Juniper Mist Wired Assurance

Juniper Mist Wired Assurance provides AI-powered automation and service-level expectations for wired network environments.

Administrators can claim, configure, and troubleshoot EX3400 switches through a centralized cloud-based interface.

This helps simplify network administration while improving visibility into connected-device experiences.

Virtual Chassis

The EX3400 supports Juniper Virtual Chassis technology.

Up to:

• 10 interconnected EX3400 switches

can operate and be managed as a single logical device.

This architecture can help:

• Reduce operational complexity
• Simplify switch management
• Support scalable network expansion
• Centralize configuration and software upgrades

MACsec Support

The EX3400 supports:

• IEEE 802.1AE MACsec

MACsec provides link-layer:

• Data confidentiality
• Data integrity
• Data-origin authentication

This helps protect traffic transmitted across supported network links.

12 Quality of Service Queues

Each EX3400 switch port supports:

• 12 QoS queues

These include:

• 8 unicast queues
• 4 multicast queues

The available queues support multilevel end-to-end traffic prioritization for applications such as:

• Data
• Voice
• Video

Flexible Enterprise Switching

The Juniper EX3400 combines fixed-configuration switching with several enterprise-grade networking capabilities.

The series is available in:

• 24-port configurations
• 48-port configurations
• PoE/PoE+ configurations
• Non-PoE configurations

These models are designed for campus wiring closet and enterprise access deployments.

Cloud and Zero-Touch Provisioning

The EX3400 is:

• Cloud-ready
• Zero-Touch Provisioning enabled

This allows switches to be onboarded and managed through Juniper Mist Wired Assurance.

Flexible Cooling

Selected EX3400 models support different cooling configurations, including:

• Front-to-back airflow
• Back-to-front airflow

These options make the platform suitable for both traditional campus access and Gigabit Ethernet data center access deployments.

Redundant Power

The EX3400 supports:

• Redundant power supplies
• Field-replaceable power supplies

Available power supplies can provide up to:

• 920W

depending on the selected switch model.

High-Speed Uplink Connectivity

EX3400 switches provide:

• 4 dual-mode 1GbE/10GbE SFP/SFP+ uplink ports
• 2 x 40GbE QSFP+ ports

These interfaces provide high-speed connectivity between the access layer and aggregation or core network infrastructure.

Virtual Chassis Connectivity

Uplink ports can also be configured as Virtual Chassis interfaces.

Virtual Chassis connections can use standard:

• 10GbE optical interfaces
• 40GbE optical interfaces

The 40GbE uplink ports are configured as Virtual Chassis ports by default.

Layer 2 and Layer 3 Networking

The EX3400 provides comprehensive Layer 2 functionality together with routing capabilities.

Standard functionality includes:

• Layer 2 switching
• RIP
• Static routing

Additional Layer 3 functionality is available through an optional Enhanced Feature license.

Supported capabilities include:

• OSPF v2
• IGMP v1/v2/v3
• PIM
• VRRP
• BFD
• Virtual Router

IPv6 Management

The EX3400 supports IPv6 management functionality including:

• Neighbor Discovery
• Stateless Auto Configuration
• Telnet
• SSH
• DNS
• System logging
• NTP
• Ping
• Traceroute
• ACLs
• Class of Service
• Static routing
• RIPng

Advanced IPv6 Routing

Additional IPv6 routing capabilities are available through an optional Enhanced Feature license.

These include:

• OSPFv3
• Virtual Router support for unicast
• VRRPv6
• PIM
• MLD v1/v2

Advanced Routing

An optional Advanced Feature license provides support for:

• BGP
• Multiprotocol BGP
• IS-IS

Energy Efficient Ethernet

The EX3400 Series supports:

• Energy Efficient Ethernet (EEE)

This helps improve energy efficiency across compatible Ethernet connections.

Compact 1U Design

The EX3400 uses a compact:

• 1U form factor
• 13.8-inch depth

This compact design provides greater deployment flexibility in enterprise wiring closets and data center environments.

Junos Operating System

The EX3400 uses the modular Juniper Networks Junos operating system.

This provides a consistent control-plane implementation across Juniper fixed-configuration EX Series switches.

The common Junos OS environment helps simplify:

• Network operations
• Administration
• Configuration
• Software upgrades

EX3400 Series Models

EX3400-24T

The EX3400-24T provides:

Access Ports

• 24 x 10/100/1000BASE-T ports

Uplinks

• 4 x 1/10GbE SFP/SFP+ ports
• 2 x 40GbE QSFP+ ports

Airflow

• Front-to-back

Power Supply

• AC
• 150W power supply

PoE

• No PoE
• 0W PoE budget

Maximum System Power Consumption

• 100W

EX3400-48T

The EX3400-48T provides:

Access Ports

• 48 x 10/100/1000BASE-T ports

Uplinks

• 4 x 1/10GbE SFP/SFP+ ports
• 2 x 40GbE QSFP+ ports

Airflow

• Front-to-back

Power Supply

• AC
• 150W power supply

PoE

• No PoE
• 0W PoE budget

Maximum System Power Consumption

• 120W

EX3400-48T-AFI

The EX3400-48T-AFI provides the same 48-port Gigabit Ethernet access configuration with reverse airflow.

Access Ports

• 48 x 10/100/1000BASE-T ports

Uplinks

• 4 x 1/10GbE SFP/SFP+ ports
• 2 x 40GbE QSFP+ ports

Airflow

• Back-to-front

Power Supply

• AC
• 150W power supply

PoE

• No PoE
• 0W PoE budget

Maximum System Power Consumption

• 120W

EX3400-24P

The EX3400-24P combines 24-port Gigabit Ethernet connectivity with PoE+.

Access Ports

• 24 x 10/100/1000BASE-T PoE+ ports

Uplinks

• 4 x 1/10GbE SFP/SFP+ ports
• 2 x 40GbE QSFP+ ports

PoE Budget

The switch provides:

• 370W with one power supply
• 720W with two power supplies

Airflow

• Front-to-back

Power Supply

• AC
• 600W power supply

Maximum System Power Consumption

• 110W, excluding PoE load

EX3400-48P

The EX3400-48P provides a higher-density PoE+ access configuration.

Access Ports

• 48 x 10/100/1000BASE-T PoE+ ports

Uplinks

• 4 x 1/10GbE SFP/SFP+ ports
• 2 x 40GbE QSFP+ ports

PoE Budget

The switch provides:

• 740W with one power supply
• 1440W with two power supplies

Airflow

• Front-to-back

Power Supply

• AC
• 920W power supply

Maximum System Power Consumption

• 120W, excluding PoE load

EX3400-24T-DC

The EX3400-24T-DC provides a DC-powered 24-port configuration.

Access Ports

• 24 x 10/100/1000BASE-T ports

Uplinks

• 4 x 1/10GbE SFP/SFP+ ports
• 2 x 40GbE QSFP+ ports

PoE

• No PoE
• 0W PoE budget

Power Supply

• DC
• 150W power supply

Airflow

• Front-to-back

Maximum System Power Consumption

• 100W

EX3400-48T-DC

The EX3400-48T-DC provides a DC-powered higher-density configuration.

Access Ports

• 48 x 10/100/1000BASE-T ports

Uplinks

• 4 x 1/10GbE SFP/SFP+ ports
• 2 x 40GbE QSFP+ ports

PoE

• No PoE
• 0W PoE budget

Power Supply

• DC
• 150W power supply

Airflow

• Front-to-back

Maximum System Power Consumption

• 120W

EX3400 Platform Specifications

Form Factor

• 1RU

Port Density

The EX3400 provides:

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

Power over Ethernet

PoE-enabled models support:

• PoE
• PoE+
• Up to 30W per port

Switching Capacity

The EX3400 platform provides up to:

• 336 Gbps switching capacity

Fabric

The platform supports:

• Juniper Virtual Chassis

Cost-Effective Switching for Enterprise Access Networks

The Juniper EX3400 Ethernet Switches provide a flexible access switching solution for demanding enterprise data, voice, and video environments.

With 24- and 48-port PoE and non-PoE models, 1/10GbE SFP+ uplinks, 40GbE QSFP+ connectivity, Virtual Chassis support for up to 10 switches, MACsec security, cloud management through Juniper Mist Wired Assurance, and switching capacity reaching 336 Gbps, the EX3400 Series provides a scalable foundation for modern enterprise access networks.