Vikram Sekar/Why Optical Circuit Switching is Arista Networks’ Long-Term Problem

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Why Optical Circuit Switching is Arista Networks’ Long-Term Problem

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This deep-dive report cuts through the noise to analyze the coming battle for the data center. It reveals why the rise of Optical Circuit Switching (OCS)—a technology championed by hyperscalers like Google—poses a significant, long-term threat to the market dominance of Arista Networks and its "blue-box" networking model built on Broadcom silicon.

Contents

Inside, you will discover:

  • The critical difference between Arista’s software-defined, packet-switching moat and the fundamentally optical architecture of OCS.

  • How Google achieved massive savings (30% capex, 41% power) by deploying OCS and why other hyperscalers like Microsoft and Meta are actively exploring the technology.

  • Why Arista's explosive near-term growth is blinding the market to a possible long-term contraction in their high-margin spine switch business.

  • A critique of sell-side commentary, contrasting Arista's current position with the inevitable pressure to adapt to an optical-first world.

  • Three scenarios for how the optics-vs-copper debate will play out, determining whether Arista can extend its relevance through optical network orchestration.

This essential read is for investors, technologists, and industry professionals seeking an unvarnished view of the AI networking landscape and the structural risks facing one of the industry's biggest players.

Get the insights you need to understand the future of the data center—before the shift is complete.

VNL_AristaOCSThreat_03112026.epub
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VNL_AristaOCSThreat_03112026.pdf
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