EX4300-48P-S - Juniper EX4300-48P-S 48x1GbE PoE+ 4xQSFP+ Switch

Name: Juniper EX4300-48P-S 48x1GbE PoE+ 4xQSFP+ Switch
Brand: Juniper
SKU: EX4300-48P-S

EX4300-48P-S - Juniper EX4300-48P-S 48x1GbE PoE+ 4xQSFP+ Switch | US IT Hardware

Product overview

The Juniper EX4300-48P is a fixed-configuration 1U rackmount Layer 3 Ethernet switch delivering 48 ports of 10/100/1000BASE-T PoE+ connectivity with four 40GBASE QSFP+ uplink ports. It provides 496 Gbps switching capacity and 369 Mpps wire-speed throughput, supporting up to 30W per port for high-density IP telephony and wireless access points. The switch features a 1100W AC power supply with 950W PoE+ budget, dual hot-swappable redundant power supplies, and field-replaceable fans for maximum uptime. Running Junos OS, it supports Virtual Chassis technology, allowing up to 10 switches to be managed as a single device with 320 Gbps backplane speed. Ideal for campus networks, branch offices, and data center access layers, the EX4300-48P combines carrier-class reliability with scalable, pay-as-you-grow economics for enterprise environments.

496 Gbps switching capacity with 369 Mpps wire-speed
48x PoE+ ports delivering 30W per port, 950W total
4x 40GBASE QSFP+ uplinks for core connectivity
Virtual Chassis support: scale to 10 switches, 320 Gbps
Hot-swappable redundant PSU and field-replaceable fans
1U rackmount, Junos OS, Layer 2/3 switching

Expedited and overnight shipping options are available at checkout, priced by destination and service.
Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	EX4300-48P-S
Brand	Juniper
Condition	New
Model	EX4300-48P-S
Product Line	EX4300
Product Type	Ethernet Switch
Operating System	Junos OS

Storage

Flash Memory	2 GB

Processor

Compatible systems

No specific compatibility lists found for EX4300-48P-S

Best for

Campus Networks
Deploy as a core or access switch in large campus environments. The 48 PoE+ ports support high-density IP telephony and 802.11n wireless access points at 30W per port, while Virtual Chassis technology scales to 10 switches for seamless management across multiple buildings.
Data Center Access
Provides 496 Gbps switching capacity and 369 Mpps throughput for data center access layers. Four 40GBASE QSFP+ uplink ports enable high-speed connections to core infrastructure, with redundant power supplies and hot-swappable components ensuring continuous operation.
Branch Offices
Compact 1U form factor fits standard racks in branch locations. PoE+ support eliminates separate power infrastructure for endpoints, while Junos OS and Virtual Chassis enable centralized management across distributed branch deployments.
IP Telephony Deployments
All 48 ports support 802.3at PoE+ delivering up to 30W per port, making it ideal for high-density VoIP phone installations without requiring additional power infrastructure or separate PoE injectors.
Wireless Network Infrastructure
Supports 802.11n wireless access point deployments with PoE+ power delivery on all 48 ports. The 496 Gbps capacity and wire-speed throughput handle aggregated wireless traffic from multiple access points without bottlenecks.

Details

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Data Rate	496 Gbps
Throughput	369 Mpps (wire speed)
Backplane Speed	320 Gbps (Virtual Chassis)

Power Supplies	1100 W AC PSU (hot-swappable redundant); Provides 950 W PoE+ power

Dimensions	17.4 x 1.7 x 16.4 in (44.2 x 4.3 x 41.7 cm) (W x H x D)
Rack Units	1 RU
Form Factor	Fixed-configuration 1U rackmount

Interface/Ports

PoE Ports	48 ports supporting PoE+ up to 30W per port
Ethernet Ports	48 x 10/100/1000BASE-T PoE+ ports; 4 x 40GBASE QSFP+ ports
QSFP+ Port Density	4 per switch; Up to 20 in Virtual Chassis (2 ports per switch for VChassis)

How many powered devices can the EX4300-48P support simultaneously?

The switch provides 950W of PoE+ power budget across 48 ports at 30W per port maximum. This supports approximately 31 devices at full 30W power draw, or more devices if they consume less power. The 1100W AC power supply includes redundancy for high availability in critical deployments.

What is the maximum throughput and switching capacity?

The EX4300-48P delivers 496 Gbps switching capacity with 369 Mpps wire-speed throughput. This ensures non-blocking performance across all 48 Gigabit ports plus four 40GBASE QSFP+ uplinks, guaranteeing that traffic is never dropped or delayed due to switch limitations.

Can multiple EX4300-48P switches be managed as one device?

Yes, Virtual Chassis technology allows up to 10 EX4300 and/or EX4600 switches to be interconnected and managed as a single logical device with 320 Gbps backplane speed. This enables seamless scaling from 48 ports to 480+ ports while maintaining unified management and consistent policies.

What uplink options are available for core connectivity?

The switch includes four fixed 40GBASE QSFP+ ports for high-speed uplinks to core infrastructure. An optional four-port 1/10GbE uplink module can be added for additional flexibility. In Virtual Chassis configurations, up to 20 QSFP+ ports are available across 10 switches.

What redundancy features ensure high availability?

The EX4300-48P includes hot-swappable redundant internal power supplies, field-replaceable fans, and graceful Routing Engine switchover (GRES) in Virtual Chassis configurations. These features minimize downtime during maintenance and ensure continuous operation in mission-critical environments.

Is this switch suitable for wireless access point deployments?

Yes, all 48 ports support 802.3at PoE+ delivering up to 30W per port, making it ideal for high-density 802.11n wireless access point deployments. The 496 Gbps switching capacity and wire-speed throughput handle aggregated wireless traffic without bottlenecks.

What operating system and management capabilities does it support?

The switch runs Junos OS, providing comprehensive Layer 2 and Layer 3 switching capabilities, advanced security features, QoS management with 12 queues per port, and cloud-managed options. It supports sFlow for traffic monitoring and integrates with enterprise management platforms for centralized control.

Juniper EX4300-48P-S 48x1GbE PoE+ 4xQSFP+ Switch