Arista DCS-7124S — 24x SFP+ 10GbE 1U Data Center Switch (Arastra-era 7100 Series)
Technical Identity
The Arista DCS-7124S (7124S) is a 1U data-center Ethernet switch from the Arista 7100 series with 24x SFP+ ports supporting 1/10GbE modules and wire-speed L2/3/4 forwarding. It is one of Arista's earliest products, first shipped in the company's founding Arastra era, and the unit in this listing may carry ARASTRA branding on its label. Condition: Refurbished.
Specifications
Brand: Arista Networks (early units branded Arastra)
Model / MPN: DCS-7124S
Product type: Data-center Ethernet switch (fixed configuration)
Product family: Arista 7100 Series
Ports: 24x SFP+ (1/10GbE SFP and SFP+ options)
Aggregate capacity: wire speed on all 24 ports (480 Gbps full duplex)
Forwarding: L2/L3/L4 per the Arista 7100 series datasheet
Form factor: 1U rack-mount, redundant power and cooling
Airflow / PSU: per unit label — verify before order
Operating system: Arista EOS (legacy trains only; platform end-of-life)
Condition: Refurbished
Engineering Context
The 7124S is a piece of data-center history: the platform on which Arista EOS first shipped, launched while the company still operated as Arastra (renamed Arista Networks in 2008). It delivered wire-speed 10GbE switching with EOS's Linux-based architecture at a time when dense low-latency 10GbE was new. Today it is relevant as a legacy spare, a lab/collector unit, or a low-cost 10GbE switch where software currency is not a requirement.
Use Cases
Spare unit for legacy 7100-series deployments still in service
Lab, test-bench and training environments needing inexpensive 10GbE ports
Collector / demonstration interest as an early Arastra-era Arista platform
Basic 1/10GbE aggregation where modern EOS support is not required
What This Is NOT
NOT the DCS-7124SX. The SX is a later, lower-latency 7100-series model; this is the original 7124S.
NOT a 25/40/100GbE switch. SFP+ 1/10GbE only; SFP28, QSFP+ and QSFP28 are not supported.
NOT an InfiniBand switch. Ethernet only.
NOT a currently supported Arista platform. The 7100 series is end-of-life with no current EOS train support.
NOT supplied with transceivers, cables, rail kits or other accessories unless explicitly stated.
NOT sold with any EOS software license or support entitlement. Software and support arrangements are between the buyer and Arista.
Compatibility & Hard Constraints
Optics/cabling: 10GbE SFP+ and 1GbE SFP optical or copper modules; SFP+ DAC subject to platform support — verify module compatibility for this legacy platform before deployment.
Typical peer platforms: 1/10GbE servers and switches of the same era.
Software: legacy EOS images only; availability requires an Arista account/entitlement.
Pre-deployment verification: confirm airflow, PSU type, module compatibility and EOS image availability against the unit label and Arista documentation.
Frequently Asked Questions (FAQ)
Q. What is the Arista DCS-7124S?
The DCS-7124S is a 1U data-center Ethernet switch from the Arista 7100 series with 24x SFP+ ports supporting 1/10GbE optics, providing wire-speed L2/L3/L4 switching across all 24 ports (480 Gbps aggregate full duplex), running Arista EOS.
Q. Why does the unit carry ARASTRA branding?
The 7124S is one of the earliest Arista platforms, originally launched when the company operated under its founding name, Arastra (renamed Arista Networks in 2008). Units from early production runs may carry ARASTRA branding on the chassis or label - it is the same product line.
Q. Is the DCS-7124S the same as the DCS-7124SX?
No. The 7124SX is a later, lower-latency member of the 7100 series. This listing is for the original 7124S.
Q. Does the DCS-7124S support 25GbE, 40GbE or QSFP ports?
No. All 24 ports are SFP+ cages for 1/10GbE SFP/SFP+ modules. SFP28 25GbE, QSFP+ 40GbE and QSFP28 100GbE are not supported.
Q. Which Arista EOS versions support the DCS-7124S?
The 7100 series is a legacy, end-of-life product line that no longer receives EOS software support. The final supported EOS release should be verified against Arista's end-of-support notices. No software entitlement is included with this hardware.
Q. What condition is the DCS-7124S supplied in by T.E.S IT-SOLUTIONS?
Refurbished. The unit is tested, inspected and professionally packed, shipping from EU stock with global B2B delivery. Airflow and PSU configuration are per unit label - confirm before order.
Why T.E.S IT-SOLUTIONS
Every DCS-7124S unit ships with: (1) power-on and functional testing, (2) configuration reset and inspection, (3) full cosmetic inspection, (4) professional packaging for freight, (5) global B2B shipping from EU stock, (6) technical consultation for data-center network design at no extra cost.
Condition: Refurbished. Tested working. May carry early ARASTRA branding per unit label. EU stock, global B2B shipping.