Juniper Networks EX3400-48T Ethernet Switch

The Juniper Networks EX3400-48T Ethernet Switch is a high-performance access switch designed to meet the demands of modern enterprise and campus networks. Built on Juniper’s proven EX Series architecture, the EX3400 delivers reliable Layer 2 and Layer 3 switching with enterprise-grade security, making it ideal for branch offices, campus deployments, and converged network environments.

Engineered for scalability and simplicity, the EX3400 supports Virtual Chassis technology, allowing up to 10 switches to operate as a single logical device. This reduces operational complexity while increasing network resilience and flexibility. With a range of port configurations, including PoE and PoE+ options, the EX3400 is well-suited for powering IP phones, wireless access points, and IoT devices without compromising performance.

Running on Junos OS, the EX3400 benefits from Juniper’s consistent operating system across routing and switching platforms, delivering robust automation, enhanced visibility, and advanced security features. From access control and segmentation to dependable uptime and predictable performance, the Juniper EX3400 provides a cost-effective, future-ready solution for organisations that require stability, control, and long-term network reliability.

• High-Performance Switching – Delivers wire-speed Layer 2 and Layer 3 forwarding for demanding enterprise access environments.

• Virtual Chassis Technology – Up to 10 EX3400 switches can be interconnected and managed as a single logical device, simplifying operations and scaling network capacity.

• Power over Ethernet (PoE/PoE+) Support – Models with PoE/PoE+ provide up to 30 W per port, ideal for powering IP phones, wireless access points, and security cameras without separate power supplies.

• Junos Operating System – Runs Juniper’s reliable and consistent OS with advanced automation, programmability, and operational simplicity.

• Advanced Security – Built-in network access control, MACsec encryption support (on supported models), and segmentation features enhance data protection and compliance.

• Flexible Port Options – Available with a variety of Ethernet port densities and uplink choices to fit diverse deployment needs.

• Redundancy and Resilience – Support for redundant power supplies, Virtual Chassis resiliency, and proven hardware design for high network availability.

• Unified Management – Simplifies configuration and monitoring with Juniper management tools and integration into broader network management ecosystems.

• Energy Efficient – Designed for reduced power consumption without sacrificing performance.

• Scalable for Growth – Ideal for campus access and branch networks that require easy expansion and long-term infrastructure investment protection.

General & Form Factor
• Form factor: Fixed, 1 Rack Unit (1U) access switch.
• Chassis dimensions (approx): 17.4 × 1.7 × 13.8 in (44 × 4.4 × 35 cm).
• Rack-mountable design with selectable airflow direction.

Performance & Capacity
• Backplane switching capacity: 160 Gbps.
• Forwarding throughput: ~214 Mpps (24-port models) or ~250 Mpps (48-port models).

Port Density & Types
• 24-port models:
 – 24 × 10/100/1000 Base-T RJ-45 access ports.
• 48-port models:
 – 48 × 10/100/1000 Base-T RJ-45 access ports (PoE/PoE+ option available).
• Uplink ports on most models:
 – 4 × dual-mode SFP/SFP+ (Gigabit/10 GbE).
 – 2 × 40 GbE QSFP+ uplinks.

Power over Ethernet (PoE)
• 802.3af and 802.3at PoE/PoE+ support on PoE variants.
• PoE+ capable ports supply up to ~30 W per port.
• Total PoE budget on 48-port PoE+ models typically ~740 W (varies by PSU).

Virtual Chassis & Scalability
• Supports Juniper Virtual Chassis technology (up to 10 switches managed as one logical device).

Traffic & Routing Capacity
• MAC address table: typically ~32,000 entries.
• Jumbo frame support up to ~9216 bytes.
• IPv4 unicast/multicast routes support and basic Layer 3 functions (routing protocols available with appropriate licenses).

Resiliency & Management
• Redundant, field-replaceable power supply options (AC or DC).
• Redundant fans and selectable airflow for data-centre/campus deployment.
• Traffic monitoring features like sFlow; QoS queues.

Environment & Physical
• Typical enterprise rack temperature and humidity tolerances (manufacturer specified).

If you want exact specs for a specific model number (e.g., EX3400-48P, EX3400-24T-DC), I can tailor the technical sheet further.