REFURBISHED
Juniper
Juniper QFX5100-48T-AFO Refurbished 48x10GbE + 4x40GbE Switch
MPN: QFX5100‑48T-AFO
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Lifetime
Warranty
ISO 9001
Certified Testing
R2v3
Responsible Refurb
25+
Years
5K+
Customers
ISO
Certified
✓
Tested
Every WhaleyComm unit is professionally tested, reset to factory defaults, and certified by our in-house engineers — the same standard trusted by 5,000+ organisations across 25 years. Not a refurb marketplace. A certified lifecycle partner.
Enterprise-grade 10GbE copper access. Professionally tested. Backed by a Lifetime Warranty.
This refurbished Juniper QFX5100-48T-AFO is a high-density, high-performance data center switch professionally tested and reset to factory defaults. Delivering 48 x 10GbE RJ-45 copper ports and 4 x 40GbE QSFP+ uplinks, it is purpose-built for top-of-rack server access and spine-leaf aggregation in demanding enterprise and data center environments. The AFO variant provides front-to-back airflow for hot-aisle containment, while the companion AFI model provides back-to-front airflow for cold-aisle configurations — both are available from WhaleyComm, allowing precise alignment to your rack deployment standard.Powered by Junos OS, the QFX5100-48T supports a rich protocol suite including OSPF, BGP, IS-IS, EVPN-VXLAN, and MPLS, enabling scalable overlay fabrics and seamless integration into modern cloud and hybrid architectures. MACsec encryption secures east-west traffic across interconnects, while native support for NETCONF, RESTCONF, gRPC, and streaming telemetry empowers automation-first operations teams.
At $699, this unit delivers enterprise switching capability at a fraction of new-hardware cost. WhaleyComm is ISO 9001, R2v3, and e-Stewards certified with 25+ years of experience serving 5,000+ enterprise customers — every unit ships with our Lifetime Warranty.
Technical Specifications
Port Configuration
48 x 10GbE RJ-45 + 4 x 40GbE QSFP+
Downlink Speed
10GbE (10GBASE-T) copper
Uplink Speed
40GbE QSFP+
Airflow — AFO Model
Front-to-Back (hot-aisle exhaust)
Airflow — AFI Model
Back-to-Front (cold-aisle exhaust)
Operating System
Junos OS
Layer Support
Layer 2 / Layer 3
Routing Protocols
OSPF, BGP, IS-IS
Overlay Protocols
EVPN-VXLAN
MPLS
Supported
Security
MACsec encryption
Automation Interfaces
NETCONF, RESTCONF, gRPC, streaming telemetry
Form Factor
1U rack-mount
Power Supplies
Redundant hot-swappable
Fan Modules
Hot-swappable
Ideal Use Cases
Top-of-Rack Server Access
The 48 x 10GbE RJ-45 ports deliver wire-speed copper connectivity to high-density server rows, eliminating the need for SFP+ transceivers and reducing per-port cost in large deployments.
Spine-Leaf Data Center Fabric
Four 40GbE QSFP+ uplinks provide high-bandwidth connections to spine switches, making the QFX5100-48T an ideal leaf node in scalable Clos fabric architectures.
EVPN-VXLAN Overlay Networks
Native EVPN-VXLAN support enables multi-tenant overlay fabrics for private cloud and virtualized environments, with seamless integration into existing Juniper QFX infrastructure.
Hot-Aisle or Cold-Aisle Rack Deployments
The availability of both AFO and AFI airflow variants allows precise alignment to rack containment strategy, simplifying thermal management in structured data center builds.
Automation-Driven Network Operations
NETCONF, RESTCONF, gRPC, and streaming telemetry interfaces support zero-touch provisioning and real-time visibility workflows for teams running modern network automation pipelines.
Secure Campus Core or Aggregation
MACsec encryption and full L2/L3 protocol support make this switch a capable aggregation layer node for security-conscious enterprise campus and edge deployments.
What's Included
Juniper QFX5100-48T (AFI or AFO airflow variant as ordered)
Rack-mount kit and mounting hardware
Hot-swappable fan modules
Redundant hot-swappable power supplies
Console cable (RJ-45 to USB/DB-9)
Power cord
Lifetime Warranty — No Time Limits. No Questions.
Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it. We have stood behind our hardware for 25 years and 5,000+ customers — that is not a marketing line, it is our operating standard.
Compatibility Details
Review supported optics, cables, software, management protocols, and environment-specific compatibility guidance.
COMPATIBLE PLATFORMS
✓
The switch integrates with Juniper QFX spine platforms and other QFX5100 leaf nodes in spine-leaf fabric designs.
COMPATIBLE OPTICS & CABLES
✓
Compatible uplink hardware includes standard 40GbE QSFP+ transceivers and direct-attach cables.
ADDITIONAL COMPATIBILITY
✓
The Juniper QFX5100-48T is designed to operate within the Juniper QFX5100 Series ecosystem.
For compatibility verification specific to your environment, contact our engineering team: +1 214 607-4800 or sales@whaleycomm.com
Shipping & Returns
Clear fulfilment, tracking, return, warranty, and support information for enterprise hardware orders.
Shipping
Orders typically ship within 1-2 business days after payment confirmation. Tracking details are shared once the order has been dispatched.
Returns
Eligible products can be returned according to WhaleyComm's return policy. For DOA, warranty, or product-related issues, contact the support team for replacement or resolution.
Frequently Asked Questions
Product-specific answers about compatibility, testing, warranty, fulfilment, and purchase confidence.
The AFO model provides front-to-back airflow, exhausting heat into the hot aisle — the standard for most data center hot-aisle containment setups. The AFI model provides back-to-front airflow for cold-aisle configurations. Both models are otherwise identical in port count, performance, and software capability.
Yes. Running Junos OS, the QFX5100-48T supports EVPN-VXLAN natively, enabling multi-tenant overlay fabrics and cloud-ready architectures without additional licensing hardware. Ensure your Junos OS version supports the specific EVPN features required for your deployment.
The four QSFP+ ports are primarily designed for spine or aggregation uplinks, but can be used for any 40GbE QSFP+ connection depending on your topology. Contact our engineering team at +1 214 607-4800 or sales@whaleycomm.com to discuss your specific use case.
Yes. Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it at no cost — no time limits, no questions asked.
Every unit goes through our ISO 9001-certified testing process: full power-on diagnostics, port-by-port functionality testing, firmware verification, factory reset, and final inspection. A Certificate of Testing ships with every unit.
Juniper QFX5100-48T-AFO Refurbished 48x10GbE + 4x40GbE Switch
$599.00
Juniper
Juniper QFX5100-48T-AFO Refurbished 48x10GbE + 4x40GbE Switch
MPN: QFX5100‑48T-AFO
$599.00
In Stock — Ships Same Day
