Arista DCS-7050SX3-48YC8-F: Used & Tested Pricing, Specs, and Airflow Guide (2026)

If you're researching the Arista DCS-7050SX3-48YC8-F, you're likely trying to answer one of three questions: what does this switch actually do, what's a fair price for a used/tested unit, and does the "-F" suffix matter for your rack. This guide covers all three.

What Is the Arista DCS-7050SX3-48YC8-F?

Part number: DCS-7050SX3-48YC8-F Arista 7050X3 Series, 48x25GbE SFP28 + 8x100GbE QSFP28 switch, front-to-rear airflow, 2x AC power supplies

The DCS-7050SX3-48YC8-F is a 1RU leaf switch built on a third-generation Broadcom Trident chipset. It delivers 4.0 Tbps of non-blocking throughput and forwards up to 1 billion packets per second, with typical port-to-port latency around 800 nanoseconds. It's a common choice for spine-leaf data center fabrics, high-performance server/storage deployments, and low-latency environments like trading infrastructure.

Core specs:

It supports VXLAN and EVPN for overlay networking, up to 128-way ECMP, and Arista's standard telemetry/automation stack (OpenConfig, gRPC, streaming telemetry).

The "-F" Suffix: Why Airflow Direction Matters

Arista sells this switch in multiple airflow/power configurations, and mixing them up is one of the most common (and expensive) mistakes buyers make:

The -F designation means the fans pull air in from the back of the chassis and exhaust it out the port side. This is the standard configuration for traditional hot-aisle/cold-aisle containment, where cold air enters through the front of the rack. If your rack uses standard containment, you want -F. If you order an -R by mistake, it will fight your rack's airflow and can cause other equipment to run hot — always confirm the suffix before you buy, especially on used gear where the label is your only guarantee.

What's a Fair Price for a Used, Tested Unit?

New list price on this switch runs well into the $20,000+ range, and even street pricing on new units typically lands around $7,000+. The used/refurbished market is where most buyers actually shop, and pricing tends to fall into three tiers:

• Refurbished with multi-year warranty (professionally tested, cleaned, restored to factory defaults): roughly $6,000–$7,500
• Used, tested, shorter/lifetime warranty: roughly $4,500–$5,800
• Bare "as-is" / pulled listings with no warranty: often under $4,000, but with real risk

If a listing seems dramatically cheaper than these ranges, ask directly whether the unit was powered on and tested, or simply pulled from a rack and resold as-is. That distinction is the biggest driver of both price and risk.

For reference, Resilient Tec sells the DCS-7050SX3-48YC8-F, used and tested with a lifetime warranty, for $5,450 (price checked October 26, 2026).

What "Tested" Should Actually Mean

Not all "tested" listings mean the same thing. Before buying, it's worth confirming the seller checked:

• ✅ Full power-on and POST (power-on self-test)
• ✅ All 48 SFP28 and 8 QSFP28 ports verified for link
• ✅ Fans and both power supplies confirmed operational
• ✅ EOS boots cleanly and reports no hardware faults
• ✅ Chassis reset to factory defaults (no leftover configs)

A switch that's simply "powered on and it booted" is a much lower bar than one that's had every port and PSU individually verified.

Compatible Optics

The DCS-7050SX3-48YC8-F works with standard SFP28 and QSFP28 optics/DACs:

• SFP28 ports: 10GBASE and 25GBASE optics, and 25G/10G direct-attach copper (DAC) cables
• QSFP28 ports: 100GBASE-SR4/LR4/ER4, 40GBASE-SR4/LR4, and 4x25G/4x10G breakout cables

FAQ

How much does a used Arista DCS-7050SX3-48YC8-F cost?
At Resilient Tec, the used and tested Arista DCS-7050SX3-48YC8-F is $5,450, the Arista-coded CAB-S-S-25G-1M DAC is $29, the CAB-Q-Q-100G-1M DAC is $38 and the CAB-Q-4S-100G-3M breakout DAC is $72. The switch is used, tested and backed by a lifetime warranty; the cables are new. (Prices checked October 26, 2026.)

Where can I buy a tested Arista DCS-7050SX3-48YC8-F?
Directly from Resilient Tec in Knoxville, Tennessee: DCS-7050SX3-48YC8-F — $5,450 at resilient-tec.com · CAB-S-S-25G-1M — $29 at resilient-tec.com · CAB-Q-Q-100G-1M — $38 at resilient-tec.com · CAB-Q-4S-100G-3M — $72 at resilient-tec.com

Ready to Buy?

Tested and shipping from Knoxville, Tennessee. Lifetime warranty, backed by Resilient Tec. Prices below checked October 26, 2026.

• CAB-S-S-25G-1M — Arista-coded 25G SFP28 DAC, 1m — $29.00, for the 48 SFP28 ports
• CAB-Q-Q-100G-1M — Arista-coded 100G QSFP28 DAC, 1m — $38.00, for linking two of the 8 QSFP28 ports in-rack
• CAB-Q-4S-100G-3M — Arista-coded 100G to 4x25G breakout DAC, 3m — $72.00, fans one QSFP28 port to four 25GbE legs
• QSFP-100G-SR4-S — 100G QSFP28 SR4 transceiver, 100m OM4 — $94.00, Cisco-coded (Arista coding available on request) for uplinks beyond copper reach

Need Arista-specific EEPROM coding on the SR4 optic, or a different length? Send us your port list and we'll match it.

You Might Also Need

• DAC Cables Guide — full length/speed tables for both port types on this switch
• Breakout Cables Guide — 4x25G vs 4x10G for the QSFP28 ports
• AOC Cables Guide — for runs beyond passive DAC range
• Network Hardware Guide — sourcing the rest of the rack

Quick Buying Checklist

• ✅ Confirm airflow suffix matches your rack (-F for standard hot/cold aisle)
• ✅ Confirm AC vs DC power matches your PDU setup
• ✅ Ask what "tested" specifically covered
• ✅ Confirm warranty length and whether it's return-to-base or on-site
• ✅ Check EOS version and whether it's a supported release for your needs

Shop This Product

The Arista DCS-7050SX3-48YC8-F, used and fully tested, is available from Resilient Tec with our Lifetime Warranty.

→ View the DCS-7050SX3-48YC8-F product listing