Juniper part number QFX5100-48S-3AFO identifies the QFX5100-48S-3AFO - Juniper QFX5100 Series 48-Port x SFP+/SFP, 6 x QSFP+ Managed Rack-Mountable 1U Switch, an enterprise-grade Network Switches unit appropriate for data-center, server-room, and workstation deployment. Technical specifications include ports of 48, features of QSFP. Typical use cases include enterprise LAN core-distribution-access architecture, hyperconverged cluster east-west traffic, SAN fabric uplinks, and replacement of EOL/EOSL networking infrastructure under existing OEM warranty contracts. Pro Disk Network supplies the QFX5100-48S-3AFO to US business buyers. Stocked units ship same-day on in-stock orders placed before 3pm ET. Pro Disk Network applies a 90-day functional warranty. Free US ground shipping on orders over $150; same-day expedited (UPS Next Day Air, FedEx Priority) available at checkout.
The QFX5100-48S-3AFO is a Juniper network switches component with ports 48, features QSFP. Pricing on the QFX5100-48S-3AFO is quote-based — email sales@prodisknetwork.com or use our live chat for a quote within one business day.
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Reviewed by:Pro Disk Network Engineering Team — . Specifications, compatibility, and pricing for the QFX5100-48S-3AFO are shown on this page.
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Same-Day US Shipping — orders before 3pm ET ship today via UPS
30-Day Returns — pre-paid label on DOA and defective items
Quick Answer: Is the QFX5100-48S-3AFO compatible with my switch?
Pro Disk Network validates every QFX5100-48S-3AFO against the target switch's published compatibility matrix before shipment. If you let us know your switch model and firmware version, we will confirm fitment and code the module appropriately (Cisco-coded, Juniper-coded, HPE-coded, etc.) at no extra charge.
How fast does the QFX5100-48S-3AFO ship?
If in stock, the QFX5100-48S-3AFO ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
The QFX5100-48S-3AFO is deployed by US enterprises, MSPs, government, and education customers across multiple infrastructure scenarios. Below are the most common deployment patterns Pro Disk Network sees in real-world orders.
Spine-Leaf Fabric — Top-of-rack 25G/100G aggregation between leaf and spine switches. Match speed and form factor across both endpoints.
Server Uplink — 10G/25G server-to-leaf uplink — pair with matching DAC or AOC at the host NIC to avoid optic mismatch.
DCI (Data Center Interconnect) — Inter-DC routing or aggregation. LR4/LR8 transceivers for 10–80 km, ER4 for 40 km, ZR4 for coherent long-haul.
Campus Distribution — Catalyst-class campus distribution between IDF and MDF closets. PoE+ where wireless APs and IP phones share infrastructure.
What is the QFX5100-48S-3AFO?
The QFX5100-48S-3AFO is a Juniper enterprise networking device with ports 48 and features QSFP, manufactured by Juniper. Pro Disk Network ships this part new and certified-refurbished from our US warehouse with same-day dispatch on orders placed before 3 PM ET, backed by a 30-day return guarantee.
Pros & Cons of QFX5100-48S-3AFO
Pros
Matched-pair option for redundant link orders
Cabling and DAC/AOC labels clearly mark optic class
Cons
Refurbished switches may show minor rack-rail wear
Power supplies sold separately on certain SKUs
Long-haul ZR4/CFP4 modules subject to export-control screening
Frequently Asked Questions about QFX5100-48S-3AFO
Is the QFX5100-48S-3AFO a genuine Juniper part?
Yes. Pro Disk Network sources every QFX5100-48S-3AFO as factory-original Juniper inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned Juniper servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
Is the QFX5100-48S-3AFO compatible with my switch?
Pro Disk Network validates every QFX5100-48S-3AFO against the target switch's published compatibility matrix before shipment. If you let us know your switch model and firmware version, we will confirm fitment and code the module appropriately (Cisco-coded, Juniper-coded, HPE-coded, etc.) at no extra charge.
How fast does the QFX5100-48S-3AFO ship?
If in stock, the QFX5100-48S-3AFO ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
What is the warranty on the QFX5100-48S-3AFO?
New QFX5100-48S-3AFO units carry the full Juniper manufacturer warranty (typically 1 to 5 years depending on product line). Refurbished and bulk-OEM units include a Pro Disk Network advance-replacement warranty (90 days refurbished). DOA replacement is free within 30 days of receipt.
Do you offer bulk pricing for the QFX5100-48S-3AFO?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
QFX5100-96S-AFI — QFX5100-96S-AFI - Juniper QFX5100 Series 96-Port x 1/10G SFP+ 8 x 40G QSFP L3 Managed Switch — $470.40
Pro Disk Network Buyer’s Guide: Network Switches
Optic Coding, Vendor Lock-In, and Multi-Vendor Compatibility
Networking optics — SFP, SFP+, QSFP+, QSFP28 — are physically interoperable across vendors but logically restricted by firmware coding. The QFX5100-48S-3AFO is coded for a specific vendor family at our factory step before shipping, which preserves the OEM warranty workflow and allows the optic to be recognised without ‘service unsupported-transceiver’ CLI overrides. Mixing third-party optics with same-vendor optics in the same chassis is safe; mixing across vendor codings sometimes triggers warnings in the switch log.
Bandwidth Sizing for Spine-Leaf, EVPN-VXLAN, and Hyperconverged Storage
For EVPN-VXLAN overlays, the QFX5100-48S-3AFO carries the underlay tunnels in addition to the workload traffic. Plan for VXLAN encapsulation overhead (50 bytes) plus MTU headroom; set the underlay MTU to 9216 (jumbo frames) and the overlay MTU to 9000. Make sure both the QFX5100-48S-3AFO and the connected NICs support jumbo frames — some older NICs cap at 9000-byte payloads even when jumbo-enabled.