Comprehensive Product Overview

The Juniper EX3400-48P is a key model in Juniper’s EX3400 Series of fixed-configuration access switches, engineered to balance enterprise-grade performance, scalability, and PoE+ efficiency. As a high-power PoE+ switch, it delivers 30W per port (802.3af/at) to support power-hungry edge devices like Wi-Fi 6/6E APs, 4K/8K IP cameras, VoIP phones, and IoT sensors—eliminating the need for separate power adapters.

Equipped with Juniper Virtual Chassis Technology, the EX3400-48P allows up to 10 switches to be interconnected and managed as a single logical device, simplifying network scaling and reducing operational overhead. It also supports Junos Fusion Enterprise, enabling large-scale deployments where multiple switches act as satellites to a core aggregation switch.

Designed for reliability and flexibility, the switch features front-to-back airflow (standard) with optional back-to-front airflow for data center compatibility, redundant hot-swappable fans, and support for dual redundant AC/DC power supplies. Running on Junos OS, it provides consistent Layer 2/Layer 3 capabilities, advanced security, and unified management across Juniper’s entire product portfolio.

Key Features & Business Benefits

1. 48×PoE+ Gigabit Ports + High-Speed Uplinks

• Ports: 48×10/100/1000BASE-T PoE+ (802.3af/at) RJ45; 4×10G SFP+; 2×40G QSFP+
• Benefit: High-density PoE+ connectivity delivers 30W per port (total 720W default / 1440W dual PSU) to power modern edge devices; 10G/40G uplinks eliminate bandwidth bottlenecks for high-traffic networks.

2. High Performance & Scalable Stacking

• Capacity: 336 Gbps switching capacity; 250 Mpps wire-speed forwarding rate
• Virtual Chassis: Up to 10 switches in a single logical domain; 40G QSFP+ ports default as stack links
• Benefit: Wire-speed performance for voice/video/data convergence; scalable “pay-as-you-grow” architecture supports growing device density and simplifies management.

3. Cloud-Ready & AI-Powered Management

• Mist Wired Assurance: AI-driven automation, zero-touch provisioning (ZTP), real-time analytics, and predictive maintenance
• Junos OS: Unified OS for consistent management, security, and performance across Juniper devices
• Benefit: Reduces deployment time from days to hours; minimizes manual configuration errors; lowers IT operational costs with centralized cloud management.

4. Enterprise-Grade Security & Advanced QoS

• Security: MACsec encryption (88 Gbps near line-rate), 802.1X authentication, ACLs, 4096 VLANs, and port security
• QoS: 8 queues per port, strict priority scheduling, traffic shaping, and bandwidth limiting
• Benefit: Protects sensitive data and prevents unauthorized access; prioritizes critical traffic (VoIP, video, industrial IoT) for consistent user experience.

5. Reliable & Energy-Efficient Design

• Redundancy: Hot-swappable fans; redundant AC/DC power supplies (150W/600W/920W options)
• Efficiency: Energy-efficient ASIC; low-power PoE modes; compliant with Energy Star and EPEATJuniper Networks
• Benefit: 99.999% uptime for mission-critical networks; reduces power consumption and cooling costs for sustainable operations.

Technical Specifications

Ideal Application Scenarios

1. Enterprise Campus Wiring Closets: High-density PoE+ connectivity for office IP phones, Wi-Fi 6/6E APs, desktops, and IoT devices.
2. Surveillance & Security Networks: Powers 48+ 4K/8K IP cameras with PoE+; integrates with video management systems for low-latency surveillance.
3. Data Center Access Layers: 10G/40G uplinks to aggregation/core switches; redundant components and airflow options for data center reliability.
4. Education & Healthcare: Converged voice/video/data for classrooms, lecture halls, patient rooms, and administrative areas; PoE+ for medical devices and wireless APs.
5. Retail & Hospitality: PoE+ for POS terminals, Wi-Fi APs, digital signage, and guest access points; secure network segmentation for employees and guests.

Supported Accessories & Modules

• Transceivers (SFP+/QSFP+): 10GBASE-SR/LR/ER; 40GBASE-SR4/LR4; DAC/active optical cables.
• Power Supplies: JPSU-920-AC-AFO (included); JPSU-920-DC-AFO (optional).
• Fan Modules: Front-to-back (standard); back-to-front (optional).
• Mounting Kits: 19” rack-mount brackets; wall-mount kit; cable management arms.
• Cables: Virtual Chassis stacking cables; console cables; power cords; SFP+/QSFP+ direct attach cables.

Frequently Asked Questions (FAQ)

Q1: What is the PoE budget of the EX3400-48P?

A: It provides a default 720W PoE budget (single 920W PSU) and up to 1440W with dual 920W PSUs, supporting 48×30W PoE+ devices.

Q2: Does it support cloud management?

A: Yes, it is Juniper Mist Cloud-ready with ZTP, AI-powered automation, real-time analytics, and predictive maintenance.

Q3: Can I stack multiple EX3400 switches?

A: Absolutely. Virtual Chassis Technology allows up to 10 EX3400 switches to be managed as a single logical device, with 40G QSFP+ ports defaulting as stack links.

Q4: What operating system does it use?

A: It runs on Junos OS, Juniper’s unified operating system, providing consistent Layer 2/Layer 3 capabilities, security, and management across all Juniper devices.

Q5: Is it suitable for data center environments?

A: Yes. It supports front-to-back/back-to-front airflow, redundant hot-swappable components, and 10G/40G uplinks, making it ideal for data center access layers.