Open AI Rack Systems Might Change The Case For Investing In Arista Networks (ANET)

• Arista Networks recently announced an open Ethernet rack-scale portfolio for AI data centers, built with partners such as AMD, Arm, Broadcom, Meta, Microsoft, Qualcomm, and others, using the ESUN initiative to link up to 1,024 accelerators across liquid-cooled racks.
• The new Etherlink SU-144 architecture and rack-scale systems give large cloud buyers an Ethernet-based alternative to proprietary AI interconnects. This is directly tied to Arista Networks' push to serve high-density AI workloads with standardized, power- and cooling-aware designs.
• Attention now shifts to how Arista Networks' AI-focused rack-scale Ethernet portfolio could influence the longer-term investment narrative around open fabrics.

Scan beyond Arista Networks and size up other AI infrastructure plays with the hand-picked 92 AI infrastructure stocks that echo this same Ethernet driven data center shift.

Arista Networks Investment Narrative Recap

To own Arista Networks, you need to believe Ethernet-centered AI networking, open fabrics, and the EOS software stack can keep pulling in AI fabrics revenue that management has guided to at least US$3.5b to US$3.6b in 2026, while campus and enterprise help diversify. The key near-term swing factor remains whether hyperscale AI capex actually flows through at the pace implied by that outlook.

The new open Ethernet rack-scale portfolio speaks directly to that catalyst, since it targets the same high-density AI buildouts. It does not remove the biggest near-term risk, though. Reliance on a handful of very large AI and cloud customers, combined with heavy multiyear chip commitments and political scrutiny of AI data centers, still leaves earnings exposed if orders surprise on the downside.

Among recent commentary, the repeated lift in Arista Networks 2026 sales outlook and the AI fabrics revenue target of at least US$3.6b matter most against this launch. The new rack-scale systems sit inside that same thesis. They extend Etherlink and ESUN into denser AI domains, which is where that AI number needs to come from.

This is where execution risk clusters for you as a shareholder. Management is tying up significant supply for Ethernet scale-up products, even while expecting ESUN-driven revenue to skew toward 2028. If hyperscalers slow AI projects, consolidate vendors, or lean harder on proprietary stacks, Arista could be left with underutilized commitments and pressure on the current 38.4% net margin profile.

Arista Networks’ current analyst narrative points to forecast revenues of US$21.4b and earnings of US$8.2b in 2029, based on an assumed 26.6% yearly increase in revenue and a move in earnings from US$4.0b today to that US$8.2b level. This would be a little more than a 2x rise in profit over the period.

Uncover why Arista Networks' fair value indicates an 11% potential upside to its current price before this discount to expectations narrows.

Exploring Other Perspectives

One alternate angle on Arista Networks leans hard into the supply side. The most optimistic analysts focus on the US$9.7b in purchase commitments and the roughly US$6.9b in deferred product revenue already queued up. Before this rack scale news, they were modeling revenue reaching about US$25.2b and earnings of US$9.5b by 2029, so it is useful to see how far expectations can stretch and why it is worth comparing several viewpoints before deciding how this announcement might reshape the story.

Explore 8 other Arista Networks fair value estimates, including one that suggests as much as 32% upside from the current price!

The Verdict Is Yours

Don't just follow the ticker; dig into the data and build a conviction that's truly your own.

• A great starting point for your Arista Networks research is our analysis highlighting 2 key rewards and 1 important warning sign that could impact your investment decision.
• See our latest analysis for Arista Networks. The report includes a comprehensive fundamental analysis summarized in a single visual, the Snowflake, making it easy to evaluate Arista Networks' overall financial health at a glance.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.

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