Arista Networks Vs. Cisco Systems: Modern AI Data Center Networking vs. Legacy Enterprise Switch Leader
Both Arista and Cisco just posted record AI-driven results, yet their stocks sold off hard. One company offers margin-rich focus while the other controls its own silicon, and the scale-across design wins separating them could define data center networking for…
Arista Networks (NYSE:ANET | ANET Price Prediction) and Cisco Systems (NASDAQ:CSCO) both reported in August, and both said AI networking powered record results. Arista posted its first $3B quarter on Ethernet AI fabrics. Cisco closed a record year on hyperscaler orders and a campus upgrade. Both now compete for the same scale-across traffic between data centers.
AI Fabrics Lift Arista While a Supercycle Lifts All of Cisco
Arista’s revenue reached $3.04B, up 37.7% YoY and ahead of the $2.83B estimate. Arista’s focused product line benefited from strong AI demand. CEO Jayshree Ullal said EtherLink adoption “now exceeds 100 cumulative customers from the initial four to five customers I spoke of in 2024.” Management also raised its 2026 outlook to about $12.6 billion, which works out to 40% growth.
Cisco’s demand spreads much wider. Networking revenue rose 28% to $9.791B, and product orders climbed 35%, or 25% ex-hyperscalers. Growth that strong outside the cloud giants points to a real enterprise upgrade. Hyperscaler AI orders hit $4 billion in the quarter. CEO Chuck Robbins said: “We are not accidental recipients of what’s going on in this AI transition.”
| Business Driver | Arista | Cisco |
|---|---|---|
| Main Growth Engine | EtherLink AI fabrics, campus | AI infrastructure, campus upgrade, security |
| Revenue Growth | 37.7% | 17.6% |
| Non-GAAP Operating Margin | 49.9% | 35.9% |
| Next-Quarter Revenue Guide | ~$3.30B | $18.0B-$18.2B |
Arista Sells Focused Switches, Cisco Sells the Whole Stack
Arista competes on EOS software. Ullal said that buyers working against tight AI deployment timelines prefer integrated systems over white-box switches. Its 1.6 Tbps 7060XE7 needs liquid cooling, so trials run through the back half of 2026, with production expected in 2027. Concentration still concerns me: Ullal expects “one, maybe two, 10% customers” next to Microsoft (NASDAQ:MSFT) and Meta Platforms (NASDAQ:META).
Cisco controls more of its own supply chain. It buys Silicon One chips directly from Taiwan Semiconductor Manufacturing (NYSE:TSM) and has secured three Scale Across design wins for the P200. That control weighs on margins. Non-GAAP gross margin slipped to 66.3% from 68.4% as hardware took a bigger share of the mix. Price increases also added about five points to revenue growth, which masks the volume picture.
Scale-Across Wins Will Decide Who Pulls Ahead
I want to see whether Arista can hold its 62% to 64% gross margin target while Ullal warns of a supply crunch lasting “until 2028.” For Cisco, watch whether AI revenue moves toward $7.5B when the company reports on November 12, 2026. Both stocks fell last week: Arista dropped 11.41% and Cisco 7.27%. The declines came despite record results at both companies.
Arista Offers Faster Growth While Cisco Adds Dividends and Buybacks
For research purposes, Arista offers the more focused exposure to AI networking. Its margins and customer momentum stand out, but a P/E near 65 leaves little room for a stumble. Cisco offers wider, steadier exposure. It pays a $0.42 quarterly dividend and has $8.1B left in buyback authorization. A key risk to monitor is whether Arista’s gross margin slips below its target range.
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Alex Sirois is a financial writer with experience spanning both retail and institutional investing. He has written for InvestorPlace and held roles at BNY Mellon and Bernstein, giving him a perspective that bridges Main Street portfolios and Wall Street analysis.
Alex holds an MBA from George Washington University and has built his career across multiple industries, including e-commerce, education, and translation — a breadth of experience that informs how he breaks down complex financial topics for everyday investors. His writing is conversational, actionable, and grounded in long-term, buy-and-hold investing principles.
At 247 Wall St., Alex focuses on delivering analysis that is both accessible and useful, with a clear emphasis on helping readers make more informed decisions with their money.
