What is the maximum PoE power available on the EX4300-48MP-S?

The switch delivers 95W PoE++ per port across all 48 ports, totaling 4,560W maximum PoE budget. Dual redundant hot-swap power supplies ensure continuous operation. This supports high-density deployments of IP phones, wireless access points, and network cameras without auxiliary power infrastructure.

Does the EX4300-48MP-S support multigigabit speeds?

Yes. All 48 ports support IEEE 802.3bz-compliant speeds: 100 Mbps, 1 Gbps, 2.5 Gbps, 5 Gbps, and 10 Gbps. Four fixed 40GbE QSFP+ ports provide uplink connectivity, with optional modules supporting 2-port 100GbE QSFP28 or 4-port 10GbE SFP+ configurations for flexible network architecture.

What is the switching capacity and throughput?

The EX4300-48MP-S delivers 928 Gbps bidirectional switching capacity and 960 Gbps maximum packet throughput with 64-byte packets, achieving 95.2 Mpps forwarding rate. The 2.2 GHz Dual-Core Intel Broadwell processor ensures wire-speed Layer 2/3 switching without bottlenecks.

Can multiple EX4300-48MP-S switches be stacked together?

Yes. Virtual Chassis technology enables up to 10 EX4300 switches to operate as a single logical unit with unified management and 320 Gbps backplane speed. This simplifies network operations and enables seamless scaling across campuses and data centers.

What management capabilities does the EX4300-48MP-S provide?

The switch runs Junos OS and supports CLI, SNMP, and web-based GUI management interfaces. It provides Layer 2/3 routing, advanced security policies, QoS with 12 queues per port, sFlow traffic monitoring, and supports 4,096 VLANs with 32,000 MAC addresses for enterprise-grade network control.

Is the EX4300-48MP-S suitable for data center deployments?

Yes. The switch is designed for data center access with 928 Gbps bidirectional throughput, optional 100GbE uplinks, hot-swappable redundant components, and Virtual Chassis stacking. It supports 32,000 IPv4 routes and 18,000 IPv6 routes, making it ideal for virtualized server environments and storage networks.

What redundancy features does the EX4300-48MP-S include?

The switch features dual redundant hot-swap AC/DC power supplies, field-replaceable fan modules, and graceful Routing Engine switchover (GRES) in Virtual Chassis configuration. These features ensure continuous operation during maintenance or component failures in mission-critical environments.

EX4300-48MP-S - Juniper EX4300-48MP-S (spare chassis, 48-port multigigabit) 48 x multigigabit 100M/1/2.5/5/10GBASE-T PoE++ ports (IEEE 802.3bz); 4 x

Name: EX4300-48MP-S - Juniper EX4300-48MP-S (spare chassis, 48-port multigigabit) 48 x multigigabit 100M/1/2.5/5/10GBASE-T PoE++ ports (IEEE 802.3bz); 4 x
Brand: Juniper
SKU: EX4300-48MP-S

EX4300-48MP-S - Juniper EX4300-48MP-S (spare chassis, 48-port multigigabit) 48 x multigigabit 100M/1/2.5/5/10GBASE-T PoE++ ports (IEEE 802.3bz); 4 x | US IT Hardware

Product overview

The Juniper EX4300-48MP-S is a 1U rack-mountable, stackable Layer 2/3 Ethernet access switch designed for enterprise data centers, campuses, and branch offices. It features 48 multigigabit ports supporting IEEE 802.3bz speeds (100M/1G/2.5G/5G/10G), four fixed 40GbE QSFP+ ports, and optional uplink modules for 100GbE connectivity. The switch delivers 928 Gbps bidirectional switching capacity and 960 Gbps packet throughput with a 2.2 GHz Dual-Core Intel Broadwell processor. It supports 95W PoE++ per port across all 48 ports via dual redundant hot-swap power supplies, enabling high-density IP telephony and wireless deployments. Virtual Chassis technology enables seamless stacking for simplified management. The EX4300-48MP-S includes 8 GB ECC DRAM, 64 GB flash storage, and supports 4,096 VLANs with 32,000 MAC addresses. Junos OS provides comprehensive Layer 2/3 routing, security, and traffic management capabilities.

48x 10GbE + 4x 40GbE ports with optional 100GbE uplinks
928 Gbps bidirectional switching, 960 Gbps max throughput
95W PoE++ per port on all 48 ports, dual redundant PSU
Virtual Chassis stacking up to 10 switches, unified management
2.2 GHz Broadwell CPU, 8GB ECC RAM, 64GB flash storage
1U rack-mount, 4,096 VLAN support, 32,000 MAC addresses

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 #	EX4300-48MP-S
Brand	Juniper
Condition	New
Model	EX4300-48MP-S (spare chassis, 48-port multigigabit)
Product Line	EX4300 Series
Product Type	Stackable Ethernet Access Switch with Virtual Chassis
Operating System	Junos OS
MAC Address Table	Maximum 32,000 MAC addresses
Management Interface	CLI, SNMP, web-based GUI; Junos OS
Compliance Certifications	IEEE 802.1Q, 802.3, 802.3az, 802.3af/at, 802.3bz; CE, FCC, UL

Compatible systems

Virtual Chassis compatible with other EX4300 series switches

Best for

Data Center Access
Provides high-density 10GbE connectivity with 928 Gbps bidirectional throughput and optional 100GbE uplinks via QSFP28 modules, supporting virtualized server environments and storage networks.
Campus Networks
Delivers multigigabit access with Virtual Chassis stacking for simplified management across multiple buildings, supporting 4,096 VLANs and 32,000 MAC addresses for large-scale deployments.
Branch Offices
Combines 48 multigigabit ports with 95W PoE++ per port to support IP phones, wireless access points, and surveillance cameras in compact 1U form factor.
High-Density PoE Deployments
Delivers 95W PoE++ on all 48 ports simultaneously via dual redundant power supplies, enabling dense IP telephony and 802.11n/802.11ac wireless access point installations.
Stackable Enterprise Networks
Virtual Chassis technology enables up to 10 switches to operate as single logical unit with unified management, reducing operational complexity in multi-switch environments.

Frequently asked questions

Details

Shipping, warranty & returns

Customer reviews

No reviews yet — be the first to review this part.

DRAM	8 GB with Error Correcting Code (ECC)
Storage	64 GB on-board flash

Processor	2.2 GHz Dual-Core Intel Broadwell CPU

Network & Communication

VLAN Support	Maximum 4,096 VLANs
Forwarding Rate	95.2 Mpps
Switching Capacity	464 Gbps (unidirectional); 928 Gbps (bidirectional)
Packet Switching Capacity	960 Gbps (maximum with 64-byte packets)

Max Wattage	200W maximum
Power Supplies	Dual redundant hot-swap AC/DC power supplies; supports up to 95W PoE++ per port

Weight	Approximately 12 lbs (5.4 kg)
Dimensions	17.5 x 12 x 1.75 in (44.5 x 30.5 x 4.4 cm) (W x D x H)
Rack Units	1 RU
Form Factor	1U rack-mountable

Interface/Ports

Uplink Ports	Optional 4-port dual-mode 10GbE/1GbE SFP+/SFP or 2-port QSFP+/1-port QSFP28 module
Ethernet Ports	48 x multigigabit 100M/1/2.5/5/10GBASE-T PoE++ ports (IEEE 802.3bz); 4 x 40GbE QSFP+ ports (fixed)
10GbE Port Density	24 fixed + 4 optional (uplink module)
40GbE Port Density	4 fixed + 2 optional (uplink module)
100GbE Port Density	2 (uplink module)

Juniper EX4300-48MP-S (spare chassis, 48-port multigigabit) 48 x multigigabit 100M/1/2.5/5/10GBASE-T PoE++ ports (IEEE 802.3bz); 4 x