What is the switching performance?

Provides 1.28 Tbps throughput and 960 Mpps capacity with cut-through/store-and-forward modes. Supports 120,000 MAC addresses, 4,095 VLAN IDs, 63 LAGs (32 ports each), and 4,095 FCoE VLANs/12 VFGs. Jumbo frames reach 9,216 bytes for efficient high-speed forwarding.

What power and cooling options are available?

Redundant hot-pluggable power supplies support 110-240V AC single phase or -36 to -72V DC (extra). Fan trays are redundant/hot-pluggable with front-to-back airflow for hot/cold aisle. 1U chassis weighs 30.75 lb (13.95 kg) with rear ports.

Is it suitable for FCoE and converged networking?

Yes, 12 ports support 2/4/8 Gbps FC alongside 10GbE, with 4,095 FCoE VLANs and 12 VFGs (up to 4 VLANs/gateway). Enables iSCSI/NAS/FC convergence in data centers, compatible with QFabric and Virtual Chassis.

What form factor and deployment flexibility?

1U rackmount with rear port connections and configurable airflow (front-to-back or back-to-front). Ideal for top-of-rack in high-density data centers, supporting QFX3600/EX4300/QFX5100 in Virtual Chassis Fabric.

QFX3500-48S4Q-AFI - Juniper QFX3500-48S4Q-AFI 48 SFP+ 4 QSFP+ Data Center Switch

Name: Juniper QFX3500-48S4Q-AFI 48 SFP+ 4 QSFP+ Data Center Switch
Brand: Juniper
SKU: QFX3500-48S4Q-AFI
Price: 720 USD
Availability: InStock

QFX3500-48S4Q-AFI - Juniper QFX3500-48S4Q-AFI 48 SFP+ 4 QSFP+ Data Center Switch | US IT Hardware

Product overview

The Juniper Networks QFX3500-48S4Q-AFI is a 1U data center switch from the QFX Series, designed for high-performance environments including traditional and virtualized data centers, high-performance computing, and cloud deployments. It features 48 dual-mode SFP+/SFP ports: 36 supporting 10GbE/1GbE and 12 supporting 10GbE or 2/4/8 Gbps Fibre Channel, plus 4 QSFP+ ports configurable as 4x10GbE or 40Gbps. Delivering 1.28 Tbps throughput and 960 Mpps switching capacity with cut-through and store-and-forward modes, it supports 120,000 MAC addresses, 4,095 VLAN IDs, and up to 63 LAGs with 32 ports each. Redundant hot-pluggable power supplies (110-240V AC or DC) and fan trays ensure high availability with front-to-back airflow. Management includes dual ports, USB, and console. Ideal for top-of-rack connectivity to servers, storage, and QFabric architectures, it provides Layer 2/3 features and FCoE support for converged networking.

1.28 Tbps throughput, 960 Mpps switching
48 dual-mode SFP+ ports: 10GbE/1GbE/FC
4 QSFP+ ports: 40GbE or 4x10GbE
Redundant hot-pluggable PSUs & fans
120K MAC, 4K VLANs, 63 LAGs
1U rackmount, front-to-back airflow

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 #	QFX3500-48S4Q-AFI
Brand	Juniper
Condition	Refurbished
Model	QFX3500-48S4Q-AFI
Product Line	QFX Series
Product Type	Data Center Switch
Certifications	REACH; WEEE; EN 60950-1; IEC 60950-1 Information Technology Equipment Safety

Network & Communication

VLAN IDs	4,095
FCoE VLANs	4,095 FCoE VLANs/FC Virtual Fabrics; 12 VFGs (up to 4 VLANs per gateway)

Compatible systems

Junos OS network OS; specific compatibility not detailed in sources

Best for

Data Center Top-of-Rack
Provides high-density 10GbE connectivity with 48 SFP+ ports and 1.28 Tbps throughput for rack servers and storage in demanding environments.
Virtualized Data Centers
Supports Layer 2/3 features, 4,095 VLANs, and FCoE with 12 FC-capable ports for converged I/O in virtualized setups.
High-Performance Computing
Delivers 960 Mpps low-latency switching and 120,000 MAC addresses for HPC clusters requiring wire-speed performance.
Cloud Computing
Configurable QSFP+ ports for 40GbE uplinks and QFabric integration enable scalable cloud fabrics with investment protection.

Frequently asked questions

What ports does the QFX3500-48S4Q-AFI support?

Details

Shipping, warranty & returns

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Switching Mode	Cut-through and store-and-forward

Switching Capacity	1.28 Tbps throughput; 960 Mpps switching capacity

Link Aggregation Groups	Up to 63 LAGs; 32 ports per LAG

Power Supplies	Redundant hot-pluggable; 110-240V AC single phase or -36 to -72V DC (extra, not included)

Weight	30.75 lb (13.95 kg) with dual power supplies and fan modules
Form Factor	1U rackmount chassis; Rear port connections

Airflow	Front-to-back or back-to-front for hot aisle/cold aisle deployment
Fan Modules	Redundant hot-pluggable fan trays for FRU side-to-port (front-to-back) airflow

Interface/Ports

SFP+ Ports	48 dual-mode SFP+/SFP ports: 36x 10GbE/1GbE, 12x 10GbE/2/4/8 Gbps FC
QSFP+ Ports	4x QSFP+ ports configurable as 4x10GbE or 40Gbps
Management Ports	Dual management ports (copper and fiber); USB port; Console port
Supported Transceivers	SFP+ 10GbE optical; SFP+ DAC 1-10m twinax; SFP FC 2/4/8 Gbps; SFP GbE optical/copper

Juniper QFX3500-48S4Q-AFI 48 SFP+ 4 QSFP+ Data Center Switch