What is the switching performance?

The switch delivers 1.44 Tbps switching capacity and 1.08 Bpps forwarding rate, with support for 288,000 MAC addresses and 4,096 VLAN IDs. The Packet Forwarding Engine features 14 million gates, 48 GB DDR3 DRAM, and 72 MB QDR2+ SRAM, ensuring low-latency Layer 2/3 handling.[Juniper datasheet ]

What airflow and form factor does it use?

It's a 1U rackmount chassis with fixed-configuration and back-to-front airflow (AFI). Includes redundant hot-swappable fans and AC power supplies (approx. 175-263W max), plus status LEDs for monitoring ports, power, fans, and alarms.[Juniper datasheet ]

What protocols and features are supported?

Supports Layer 2/3, MPLS, PTP timing, Virtual Chassis Fabric, Junos Fusion, and QFabric. Runs Junos OS for consistent operations across Juniper infrastructure, with management via dual ports. Ideal for spine-leaf, aggregation, and virtualization bridging.[Juniper datasheet ]

What are the memory and processor specs?

Equipped with a 1.5 GHz dual-core Intel CPU, 32 GB DRAM, 8 GB CPU memory, and 32 GB SSD storage. The forwarding engine has 48 GB DDR3 DRAM and 72 MB QDR2+ SRAM, supporting high-scale routing like 128,000 IPv4 unicast prefixes.[NetworkTigers ; NetworkOutlet ]

Is it suitable for data center fabrics?

Yes, designed for Virtual Chassis Fabric, Junos Fusion, QFabric, and industry-standard spine-leaf or Layer 3 fabrics. High-density 10/40GbE ports and 1.44 Tbps throughput enable mixed-speed deployments with low latency for demanding datacenters.[Juniper datasheet ]

QFX5100-48T-AFI - Juniper QFX5100-48T-AFI 48-Port 10GbE 6x40GbE Data Center Switch

Name: Juniper QFX5100-48T-AFI 48-Port 10GbE 6x40GbE Data Center Switch
Brand: Juniper
SKU: QFX5100-48T-AFI
Price: 1138 USD
Availability: InStock

QFX5100-48T-AFI - Juniper QFX5100-48T-AFI 48-Port 10GbE 6x40GbE Data Center Switch | US IT Hardware

Product overview

The Juniper Networks QFX5100-48T-AFI is a 1U fixed-configuration data center access switch from the QFX Series, optimized for high-performance environments. It features 48 tri-speed RJ-45 ports supporting 100 Mbps, 1GbE, or 10GbE connectivity over copper cables, plus 6x40GbE QSFP+ ports that break out to 4x10GbE SFP+ for flexible uplinks. Delivering 1.44 Tbps switching capacity and 1.08 Bpps forwarding rate, it supports 288,000 MAC addresses and 4,096 VLANs. Powered by a 1.5 GHz dual-core Intel CPU with 32 GB DRAM and 32 GB SSD, it includes redundant hot-swappable AC power supplies and fans with back-to-front airflow (AFI). Running Junos OS, it enables Layer 2/3, MPLS, Virtual Chassis Fabric, Junos Fusion, and QFabric. Dual management ports and status LEDs ensure reliable monitoring. Ideal for spine-leaf, aggregation, and mixed-speed server access in datacenters.

1.44 Tbps switching, 1.08 Bpps forwarding rate
48x tri-speed 10GbE RJ-45 + 6x40GbE QSFP+ ports
288K MAC, 4K VLANs for large-scale Layer 2/3
1U rackmount with redundant PSUs and fans (AFI)
Junos OS: MPLS, VCF, Junos Fusion, QFabric
32 GB DRAM, 32 GB SSD, 1.5 GHz dual-core CPU

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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 #	QFX5100-48T-AFI
Brand	Juniper
Condition	Refurbished
Model	QFX5100-48T-AFI
Cooling	Redundant fans
Status LEDs	Port status, power, fan, alarm indicators
Product Line	QFX Series
Product Type	Data Center Access Switch
Supported Protocols	Layer 2/3, MPLS, PTP timing; Virtual Chassis Fabric; Junos Fusion; QFabric
Packet Forwarding Engine	14 million gates; 48 GB DDR3 DRAM; 72 MB QDR2+ SRAM

Compatible systems

Runs Junos OS; compatible with Juniper Virtual Chassis Fabric, Junos Fusion, QFabric, spine-leaf architectures

Best for

Data Center Access
Provides 48 tri-speed RJ-45 ports for direct 10GbE/1GbE/100 Mbps server connections and 6x40GbE QSFP+ uplinks with 1.44 Tbps capacity, enabling high-density top-of-rack deployments.
Spine-Leaf Fabrics
Supports Virtual Chassis Fabric and Layer 3 fabrics with low-latency 1.08 Bpps forwarding, 288,000 MAC table, and 4,096 VLANs for scalable spine-leaf architectures.
Aggregation Layer
6x40GbE QSFP+ ports breakout to 24x10GbE, combined with MPLS and Junos Fusion compatibility, suit aggregation in mixed 1/10/40GbE environments.
High-Performance Computing
1.5 GHz dual-core CPU, 32 GB DRAM, and PTP timing deliver reliable Layer 2/3 performance for demanding HPC and virtualization bridging.

Frequently asked questions

What ports does the QFX5100-48T-AFI have?

Details

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DRAM	32 GB DRAM; 8 GB CPU memory; 32 GB SSD storage

Processor	1.5 GHz dual-core Intel CPU

VLAN IDs	4,096
Forwarding Rate	1.08 Bpps
MAC Address Table	288,000 entries
Switching Capacity	1.44 Tbps; 1.08 Bpps

Max Wattage	Approx 175-263 W (model variant dependent)
Power Supplies	Redundant AC power supplies; Hot-swappable

Form Factor	1U Rackmount
Chassis Type	Fixed-configuration; Back-to-front airflow (AFI)

Interface/Ports

Port Speed	100 Mbps RJ-45: 48; 1GbE RJ-45: 48; 10GbE RJ-45: 48; 10GbE SFP+: 24 (breakout); 40GbE QSFP+: 6
Ethernet Ports	48 x tri-speed RJ-45 (100 Mbps/1GbE/10GbE); 6 x 40GbE QSFP+; QSFP+ breakout to 4x10GbE SFP+; Dual SFP/RJ-45 management ports
Management Interface	Dual SFP/RJ-45 management ports; Junos OS

Juniper QFX5100-48T-AFI 48-Port 10GbE 6x40GbE Data Center Switch

Product overview

Featuring

Compatible systems

Best for

Frequently asked questions

Details

Shipping, warranty & returns

Customer reviews

Storage

Processor

Network & Communication

Power Consumption

Physical Characteristics

Interface/Ports