Juniper

Juniper QFX5120-48T-AFI 48x10G Copper 6x100G 2.16Tbps Switch

Name: Juniper QFX5120-48T-AFI 48x10G Copper 6x100G 2.16Tbps Switch
Brand: Juniper
SKU: QFX5120-48T-AFI
Price: 15220 USD
Availability: InStock

MPN: QFX5120-48T-AFI·By: Juniper

Part #:QFX5120-48T-AFINewIn stock

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Juniper QFX5120-48T-AFI 48x10G Copper 6x100G 2.16Tbps Switch-

$15,220.00

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Product overview

The Juniper QFX5120-48T-AFI is a versatile, high-performance Ethernet switch optimized for data center leaf/spine, top-of-rack, and campus distribution roles. It features 48 dual-speed 1GbE/10GbE RJ45 copper downlink ports for direct server connectivity and 6 dual-speed 100GbE/40GbE QSFP28 uplink ports for aggregation. With 2.16 Tbps bidirectional switching capacity and 1.62 Bpps forwarding rate, it supports wire-speed performance across all ports with latency as low as 550 ns. Powered by Junos OS, it enables advanced L2/L3 features including VXLAN, EVPN, Virtual Chassis, and EVPN-VXLAN overlays for modern cloud-native architectures. The 1U rackmount design includes dual hot-swappable AC PSUs, front-to-back or side-to-port airflow options (AFI variant), and 32MB shared packet buffer for bursty traffic. Environmental specs support 0-40°C operation, making it reliable for high-density HPC, enterprise data centers, and cloud providers demanding scalable, low-latency networking with comprehensive security and automation via CLI, SNMP, REST API.

2.16 Tbps bidirectional switching capacity supports wire-speed performance.
48x dual-speed 1/10GbE RJ45 ports enable high-density copper server access.
6x 100/40GbE QSFP28 uplinks provide scalable aggregation to spine layers.
Sub-1 microsecond latency ensures low-delay for HPC and trading applications.
32MB shared buffer handles microbursts in bursty data center traffic.
Junos OS with VXLAN/EVPN delivers cloud-native overlay networking capabilities.

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 #	QFX5120-48T-AFI
Brand	Juniper
Condition	New
Model	QFX5120-48T-AFI
Software	Junos OS with L2/L3, VXLAN, EVPN
Management	CLI, SNMP, REST API, Web GUI
Product Line	QFX Series
Product Type	Ethernet Switch

Network & Communication

Latency	550 ns (cut-through)
VLAN IDs	4,093
Jumbo Frames	9216 bytes
MAC Addresses	288,000
Packet Buffer	32 MB shared
Forwarding Rate	1.62 Bpps / 1001.7 Mpps
Switching Capacity	2.16 Tbps bidirectional

Power Consumption

Max Power	450 W (max load)
Power Supply	Dual hot-swappable AC PSUs

Physical Characteristics

Weight	24.25 lb (11 kg)
Dimensions	1.72 x 17.36 x 20.48 in (HxWxD)
Form Factor	1U rackmount

Environmental

Airflow	AFI: Side intake, port-side exhaust
Humidity	5-90% non-condensing
Operating Temp	0 to 40°C (32 to 104°F)

Interface/Ports

Ports Uplink	6 x dual-speed 100/40GbE QSFP28/QSFP+
Ports Downlink	48 x dual-speed 1/10GbE RJ45 copper

Compatible systems

Optimized for Juniper QFX ecosystems; supports standard QSFP28 optics and Junos-compatible racks.

Juniper QFX
Model: QFX5120 Series
Form factor: 1U Rackmount
Part of QFX5120 family, interoperable in Virtual Chassis.

Best for

Data Center Leaf
High-density 10GbE copper access for server pods with 100GbE uplinks to spine.
Spine/Super-Spine
Non-blocking aggregation layer with 2.16Tbps throughput for east-west traffic.
Top-of-Rack
Direct server connectivity via RJ45 ports supporting 1/10GbE dual-speed.
High-Performance Computing
Sub-microsecond latency for low-latency HPC clusters and high-frequency trading.
Cloud Provider
VXLAN/EVPN overlays for multi-tenant cloud networking with automation.
Campus Distribution
Enterprise aggregation with L3 routing and security features.

Frequently asked questions

What is the port configuration of the Juniper QFX5120-48T-AFI?

It features 48 dual-speed 1GbE/10GbE RJ45 copper downlink ports for server connectivity and 6 dual-speed 100GbE QSFP28/40GbE QSFP+ uplink ports. Uplinks support breakout to 4x10/25GbE, enabling flexible densities up to 56x10GbE total.

What switching performance does the QFX5120-48T-AFI provide?

Offers 2.16 Tbps bidirectional switching capacity and 1.62 Bpps forwarding rate with cut-through and store-forward modes. Latency is sub-microsecond (~550 ns), supporting non-blocking wire-speed across all ports for high-throughput data center environments.

What airflow and power options are available?

AFI variant provides Airflow Intake from side with port-side exhaust. Includes dual hot-swappable AC PSUs, max power 450W under load, typical 300W. Front-to-back airflow also supported via fan modules.

Is it suitable for top-of-rack deployments?

Yes, the 1U form factor with native 10GbE RJ45 ports connects directly to copper servers without transceivers. Dual-speed 1/10GbE support fits legacy and modern 10G servers in ToR roles.

What software features does it support?

Runs Junos OS with L2/L3 routing, VXLAN, EVPN-VXLAN overlays, Virtual Chassis, QoS policing/shaping, and security policies. Management via CLI, SNMP, REST API, and automation tools.

What are the environmental operating ranges?

Operates at 0-40°C (32-104°F), 5-90% humidity non-condensing, up to 6000 ft altitude. Storage -40-70°C. Compact dimensions: 1.72 x 17.36 x 20.48 inches, weight 24.25 lb.

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Manufacturer part #

QFX5120-48T-AFI

Brand

Juniper

Condition

New

Model

QFX5120-48T-AFI

Software

Junos OS with L2/L3, VXLAN, EVPN

Management

CLI, SNMP, REST API, Web GUI

Product Line

QFX Series

Product Type

Ethernet Switch

Latency

550 ns (cut-through)

VLAN IDs

4,093

Jumbo Frames

9216 bytes

MAC Addresses

288,000

Packet Buffer

32 MB shared

Forwarding Rate

1.62 Bpps / 1001.7 Mpps

Switching Capacity

2.16 Tbps bidirectional

Max Power

450 W (max load)

Power Supply

Dual hot-swappable AC PSUs

Weight

24.25 lb (11 kg)

Dimensions

1.72 x 17.36 x 20.48 in (HxWxD)

Form Factor

1U rackmount

Airflow

AFI: Side intake, port-side exhaust

Humidity

5-90% non-condensing

Operating Temp

0 to 40°C (32 to 104°F)

Ports Uplink

6 x dual-speed 100/40GbE QSFP28/QSFP+

Ports Downlink

48 x dual-speed 1/10GbE RJ45 copper