Juniper EX4300-48P 48-Port PoE+ Ethernet Switch

High-Performance Access Switch with 40GbE Uplinks and Virtual Chassis Technology

PLEASE NOTE:  STANDARD AIRFLOW IS AFI

The Juniper EX4300-48P is a high-performance Gigabit Ethernet PoE+ access switch designed for enterprise campus networks, branch offices, and high-density access layer deployments. Developed by Juniper Networks, this switch combines advanced switching performance, flexible stacking capabilities, and reliable Power over Ethernet (PoE+) support to power modern network infrastructures.

Equipped with 48 × 10/100/1000BASE-T PoE+ ports, the EX4300-48P can deliver up to 30 watts of power per port, enabling seamless connectivity for devices such as IP phones, wireless access points, surveillance cameras, and IoT devices. With a maximum PoE power budget of up to 870W (depending on PSU configuration), the switch supports large-scale deployments of powered devices without requiring additional power infrastructure.

The switch includes four high-speed 40GbE QSFP+ uplink ports, providing fast connections to aggregation or core switches. These ports can also function as Virtual Chassis Ports (VCPs), allowing multiple switches to be stacked together. Using Juniper Virtual Chassis technology, up to 10 EX4300 switches can operate as a single logical device, simplifying management and improving network resilience.

Powered by Junos OS, the EX4300-48P supports advanced Layer 2 and Layer 3 networking features, including routing protocols such as OSPF, BGP, and IS-IS, as well as MPLS and VPLS for advanced network segmentation and service provider environments.

The switch also supports Unified In-Service Software Upgrade (ISSU), enabling administrators to upgrade system software without interrupting network traffic. This feature reduces downtime and ensures continuous network availability during maintenance operations.

Designed for reliability, the EX4300-48P includes dual hot-swappable AC or DC power supplies and redundant cooling modules, ensuring consistent performance in mission-critical environments. Flexible airflow options - front-to-back (AFO) or back-to-front (AFI) - allow the switch to integrate seamlessly into various rack configurations.

With its high-density PoE+ connectivity, scalable stacking capabilities, and advanced routing support, the Juniper EX4300-48P provides a powerful and flexible switching solution for enterprise campus access networks, branch deployments, and converged data, voice, and video environments.

Product Specifications – Juniper EX4300-48P Ethernet Switch
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FAQs:

Q1. Does the EX4300-48P support 10GbE uplinks?
The base model features four fixed 40GbE ports. To add 10GbE SFP+ uplinks, you must install an optional uplink module such as the EX-UM-4X4SFP.

Q2. How many switches can I stack together?
Using Virtual Chassis technology, you can stack up to 10 EX4300 switches together using the 40GbE QSFP+ ports or the dedicated VCP ports on the rear.

Q3. Can this switch power all 48 ports with 30W simultaneously?
The standard 950W power supply provides a 715W PoE budget. To provide full 30W (PoE+) to all 48 ports (1440W total), you would need to add a second redundant power supply.

Q4. Is the airflow configurable?
Yes. Depending on the fan and power supply modules installed, the switch can support either Front-to-Back (AFI) or Back-to-Front (AFO) airflow patterns.

Q5. Does it support MACsec?
Yes. The EX4300-48P supports IEEE 802.1ae MACsec for link-layer data confidentiality, data integrity, and data-origin authentication.