Juniper EX3400-48TUncategorized

High-Density Gigabit Access With Scalable Uplinks — Juniper EX3400-48T Enterprise Ethernet Switch.

The Juniper EX3400-48T is a powerful enterprise-grade managed Ethernet switch designed for high-density Gigabit access deployments. It offers 48 x 1 GbE RJ-45 ports, 4 x 1/10 GbE SFP/SFP+ uplinks, and 2 x 40 GbE QSFP+ ports for flexible and scalable uplink connectivity. Running on Juniper Junos OS, it supports advanced Layer 2 and optional Layer 3 routing features, robust security controls, and Virtual Chassis technology — enabling up to 10 switches to be managed as a single device. Ideal for enterprise campuses, wiring closets, and data center access layers that demand performance, flexibility, and simplified management.

Model: EX3400-48T
Series: Juniper EX3400 Ethernet Switch
Type: Managed Gigabit Layer 2/Layer 3 Access Switch
Operating System: Juniper Junos OS — enterprise-grade network OS used across Juniper’s switch & router product lines.

Key Features

Ports & Connectivity

• 48 × 10/100/1000BASE-T RJ-45 Ports – full Gigabit access layer connectivity for desktops, servers, VoIP phones, wireless APs, and more.

• 4 × 1/10 GbE SFP/SFP+ Uplinks – flexible uplinks support either 1 Gb or 10 Gb fiber interfaces (optics sold separately).

• 2 × 40 GbE QSFP+ Ports – high-capacity uplinks for aggregation and backbone connectivity.

• Virtual Chassis Technology – link up to 10 EX3400 switches into one logical switch for simplified management and scalability.

Performance & Capacity

• Switching Capacity: ~336 Gbps (total bidirectional).

• Forwarding Rate: ~250 Mpps (maximum with 64-byte packets).

• MAC Address Table: ~32,000 entries.

• VLAN Support: Up to 4,096 VLANs.

• Jumbo Frames: Up to 9,216 bytes.

Layer 2 / Layer 3 & Software Features

• Full Layer 2 features: VLAN tagging, STP/RSTP/MSTP, link aggregation (LACP), QoS, MAC learning, etc.

• Basic Layer 3 support (static routing, RIP) with optional advanced routing licenses for OSPF, BGP, multicast, etc.

• Security & Control: ACLs, 802.1X port authentication, MAC limiting, DHCP snooping, Dynamic ARP Inspection (features vary by Junos version and configuration).

• Managed via CLI, SNMP, J-Web GUI, and supports automation.

Hardware & Physical Specs

• Form Factor: 1 Rack Unit (1U) rack-mountable chassis.

• Dimensions: ~17.4″ (W) × 1.72″ (H) × 13.8″ (D).

• Memory: 2 GB DRAM with ECC; 2 GB Flash.

• CPU: Dual-core 1 GHz.

• Airflow: Front-to-back (standard) with redundant, field-replaceable fans.

• Power Supply: Single 150 W AC PSU included (optional redundant or higher wattage power supplies available).

• Operating Temperature: 0 °C to 45 °C.

Typical Use Cases

• Enterprise access layer for wired networks

• Campus network closets or edge deployments

• High-performance aggregation with 40 GbE uplinks

• Virtual Chassis stacking for large campus or data center access fabrics

• Scalable SMB and medium enterprise deployments