Key takeaways from Arista's Q3 financials
Arista Networks continues to report solid financial performance. This week, the networking vendor announced third-quarter revenue of $2.3 billion, which is up 4.7% over the second quarter of 2025 and an increase of 27.5% compared to the third quarter of 2024. Here are some of the networking highlights from Arista’s latest financial results conference call.
AI networking megatrend
“We find ourselves amid an undeniable and explosive AI megatrend,” Arista CEO Jayshree Ullal told analysts on the earnings call. “As AI models and tokens grow in size and complexity, Arista’s driving network scale of AI XPUs handling the power and performance. Basically, the tokens must translate to terawatts, teraflops, and terabits. We are experiencing a golden era in networking with an increasing TAM [total addressable market] now of over $100 billion in forthcoming years.”
Arista is building the modern AI stack, which “includes the trio of compute, memory storage, and a solid network foundation to run training and inference models. Our stated goal of $1.5 billion AI aggregate for 2025, comprising both backend and frontend, is well underway,” Ullal said. “We are experiencing momentum across cloud and AI titans, near cloud providers, and the campus enterprise. The demanding scale of AI buildouts is clearly unprecedented as we look to move data faster across multi-planar networks.”
In a research note about the results, Sebastien Naji, an analyst with Willim Blair, wrote: “Arista’s management remains confident that we are still in the early innings of an AI megatrend. In particular, while Arista is increasingly well positioned to capture its fair share of the AI backend scale-out opportunity (a market that should continue to expand as more GPUs/ASICs are deployed) it is also benefiting from increasing demand for AI front-end networking (driven in part by growth in inference), as well as ramping-up scale-across (between data centers as clusters scale beyond a single physical location) and scale-up opportunities (for connecting GPUs within racks).”
Ethernet’s growing role in AI networking
Arista this quarter joined with AMD, ARM, Broadcom, Cisco, HPE Networking, Marvell, Meta, Microsoft, and Nvidia to form the Ethernet for Scale-Up Networking (ESUN) initiative. The group expects ESUNto advance the Ethernet networking technology to handle scale-up connectivity across accelerated AI infrastructure.
In terms of how AI racks and networks are designed, Ullal said she expects a variety of options will be developed around Ethernet-based systems in the future.
“I think a lot of these designs will materialize as the standards for Ethernet are getting stronger and stronger. We now have a UEC [Ultra Ethernet Consortium] spec. You heard me talk about the Scale-Up Ethernet spec for ESUN where we can bring different work streams onto the same Ethernet headers, transport headers, data link layer, et cetera. So I think a lot of this will be underway in 2026 and really emerge in 2027 as Scale-Up Ethernet becomes a more important part of that,” Ullal said.
“Arista’s Ethernet portfolio is entirely UEC capable, compatible, and we will continue to add more and more compliance, packet trimming, packet spring, dynamic load balancing. These are all important features that our switches support. And we will augment that with the ESUN specification,” Ullal said.
“We’ve been an early pioneer, 4 vendors started this together, including Broadcom, Arista and a couple of our cloud titan customers. I’m pretty sure it will be 20, 25, 30 over time. And having a standards-based ESUN agreement will allow us to expand UEC into the scale-up configuration as well, leveraging UEC and IEEE specs.”
Accelerating the accelerators
When asked about the growing convergence between compute and networking and how Arista will handle that integration, Ullal noted Arista’s current development and testing of a significant number of these racks.
“I think at any given time, we have five to seven projects with different accelerator options. Obviously, Nvidia is the gold standard today, but we can see four or five accelerators emerging in the next couple of years. Aristo is being sought to bring all aspects, the cradling, the co-packaging, the power, the cooling, as well as the connection to different XPU cartridges as the network platform of choice in many of these cases. So we are involved in a lot of early designs. I think a lot of these designs will materialize,” Ullal said.
