EX4300-48T Juniper EX4300 48-port GigE Copper Switch with 4xQSFP Uplinks
Juniper EX4300-48T 48-Port Ethernet Switch
High-Performance Gigabit Access Switch with 40GbE Uplinks and Stacking
PLEASE NOTE: STANDARD AIRFLOW IS AFI
Product Specifications – Juniper Networks EX4300-48T Ethernet Switch (48-Port 1GbE with 40GbE Uplinks)
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| Specification | Details |
|---|---|
| Product Name | Juniper Networks EX4300-48T Ethernet Switch |
| Manufacturer | Juniper Networks |
| Part Number | EX4300-48T |
| Product Type | Fixed-Configuration Ethernet Access Switch |
| Switch Series | Juniper EX4300 Series |
| Deployment Type | Enterprise Campus Access, Aggregation, Data Center Top-of-Rack |
| Total Access Ports | 48 × 10/100/1000BASE-T (RJ-45) |
| PoE Support | No (PoE+ supported on EX4300-48P model) |
| Uplink Ports | 4 × 40GbE QSFP+ (Fixed) |
| Port Speed | 1GbE access ports with 40GbE uplinks |
| Switching Capacity | Up to 496 Gbps |
| Forwarding Rate | Up to 369 Million Packets per Second (Mpps) |
| Virtual Chassis Support | Yes – up to 10 switches |
| Virtual Chassis Bandwidth | Up to 320 Gbps stacking bandwidth |
| Mixed Virtual Chassis | Supported with EX4300 and EX4600 |
| Operating System | Junos OS |
| Management Interfaces | CLI, SNMP, NETCONF, Junos Space, REST APIs |
| Routing Protocols Supported | Static Routing, RIP, OSPF (v2/v3), BGP, IS-IS |
| Layer Support | Layer 2 and Layer 3 switching and routing |
| VLAN Support | IEEE 802.1Q VLAN tagging |
| Spanning Tree Protocols | STP, RSTP, MSTP |
| Link Aggregation | IEEE 802.3ad (LACP) |
| Data Center Bridging (DCB) | Supported |
| VXLAN Support | Hardware-based VXLAN Layer 2 Gateway |
| QoS Support | Advanced QoS with traffic classification and shaping |
| Multicast Protocols | IGMP v1/v2/v3, PIM-SM, PIM-SSM |
| Security Features | MACsec support, ACLs, DHCP Snooping, Dynamic ARP Inspection |
| Power Supply | 2 × Redundant Hot-Swappable AC or DC Power Supplies |
| Power Supply Type | AC or DC options available |
| Cooling System | Field-replaceable fan trays |
| Airflow Direction | Front-to-Back (Standard) or Back-to-Front (Optional) |
| Latency | Low latency architecture suitable for data center workloads |
| Jumbo Frame Support | Up to 9,216 bytes |
| Stacking Ports | 40GbE QSFP+ ports can be used as Virtual Chassis Ports (VCPs) |
| Form Factor | 1U Rack Mount |
| Rack Units | 1 RU |
| Typical Power Consumption | ~180–250 W depending on configuration |
| Operating Temperature | 0°C to 45°C |
| Storage Temperature | -40°C to 70°C |
| Deployment Scenarios | Enterprise access layer, campus aggregation, data center top-of-rack networking |
FAQs:
Q1. What is the difference between the EX4300-48T and the EX4300-48P?
The "T" in 48T stands for "Trio/Termination" (standard copper), while "P" in 48P stands for PoE+. The EX4300-48T does not provide Power over Ethernet for devices like IP phones or APs.
Q2. Can I use 10GbE uplinks on this switch?
Yes. While the 40GbE ports are fixed, you can add an optional uplink module (such as the EX-UM-4X4SFP) to the expansion slot to gain four 10GbE SFP+ ports.
Q3. Does this switch support front-to-back airflow?
Yes. The standard configuration is front-to-back. However, by selecting specific power supplies and fan modules (AFI models), you can configure the switch for back-to-front airflow for hot-aisle/cold-aisle data center designs.
Q4. Are the stacking cables included?
No. Stacking requires either QSFP+ DAC cables for the fixed ports or specialized Virtual Chassis cables if using the dedicated VCP ports on the rear.
Q5. How many MAC addresses does the EX4300-48T support?
The switch supports up to 64,000 MAC addresses, making it highly capable for large-scale enterprise campus environments.
