When you put everyone on a level playing field, the results become credible.
In the spring of 2021, Keysight Technologies convened a rare gathering of customers, vendors, and independent testers around a shared question that open-source networking had long deferred: does SONiC, the disaggregated Linux-based network operating system, actually perform when the stakes are real? The Plugfest was not merely a technical exercise but a rite of passage — the moment when community enthusiasm meets community accountability. For enterprises weary of vendor lock-in, the results would determine whether a more open path forward was truly walkable.
- SONiC's promise of vendor-neutral, mix-and-match networking had won industry enthusiasm, but no one had yet subjected it to rigorous, multi-vendor, community-witnessed stress testing.
- The gap between hyperscaler adoption and broader enterprise readiness created real urgency — organizations like LinkedIn were already committed, while others waited for proof before risking their infrastructure.
- Keysight and AVIZ Networks built a simulated hyperscale data center environment capable of scaling across servers, switch layers, and full fabric topologies, turning abstract claims into measurable outcomes.
- Three testing tiers — core features, maximum scale, and real-world operational conditions including failure recovery — were designed to expose not just whether SONiC worked, but whether it worked in ways that actually mattered to deployers.
- The virtual format, forced by pandemic constraints, paradoxically broadened participation, allowing customers, vendors, and testers across geographies to run against a common platform simultaneously.
- When results emerge, they will either accelerate enterprise adoption of open networking or surface the gaps that still stand between a compelling architecture and a production-ready one.
In May 2021, Keysight Technologies organized the first major community testing event for SONiC, an open-source network operating system that had been gaining quiet momentum among large technology companies. The event — called a Plugfest — was built around a deceptively simple question: how well does this software actually perform across different hardware platforms and vendors?
SONiC runs on Linux and operates across network switches from multiple manufacturers, built on a disaggregated architecture that allows organizations to mix switch hardware, silicon, and software from different vendors. This stands in direct contrast to traditional networking, where integrated systems from a single vendor are the norm. For organizations frustrated by lock-in, the promise was real — but promise and proven performance are not the same thing.
The plugfest assembled three groups: end-user customers including LinkedIn, Yahoo! Japan, and LINE; hardware and chip vendors; and independent test partners Keysight and AVIZ Networks. The structure was deliberate — by aligning all three groups around a common testing framework, the event could measure not just functionality but relevance to actual deployment scenarios.
Testing was organized into three tiers: an essential suite validating core features, a scale suite pushing the system to its limits, and an operations suite simulating real-world conditions including failure recovery and leaf-spine data center topologies. The test environment itself was built to replicate hyperscale infrastructure — the kind operated by the largest cloud companies — turning the exercise into genuine stress-testing rather than controlled demonstration.
LinkedIn's Shawn Zandi described the event as a validation moment, while Microsoft's Lihua Yuan noted that broad industry support and actual production readiness remain distinct achievements. SONiC had accelerated significantly through 2020, hardening itself for deployments beyond the hyperscalers that originally drove its creation. The Plugfest was the community's mechanism for turning that development into documented, public proof — results that would either clear the path for enterprise adoption or honestly identify what still needed fixing.
In May 2021, Keysight Technologies organized the first major community testing event for SONiC, an open-source network operating system that had been quietly gaining traction among large technology companies and infrastructure providers. The event, called a Plugfest, was designed to answer a straightforward but important question: how well does this software actually work when you put it to the test across different hardware platforms and vendors?
SONiC is built on Linux and runs on network switches from multiple manufacturers. What makes it significant is its disaggregated architecture—the idea that you can mix and match components: the switch hardware itself, the silicon chips inside it, and the operating system software, all from different vendors. This flexibility is the opposite of the traditional networking world, where you typically buy a complete, integrated system from a single company. For large organizations tired of vendor lock-in, the promise of SONiC was compelling. But promise and proven performance are different things.
The plugfest brought together three distinct groups. First came the customers—companies like LinkedIn, Yahoo! Japan, LINE, World Wide Technology, and others who had already begun experimenting with SONiC or were considering it. Then came the vendors: the manufacturers of switches, chips, and related equipment. Finally, there were the test partners: Keysight and AVIZ Networks, who built the actual testing infrastructure. This structure was deliberate. By having end users, vendors, and independent testers all working from the same playbook, the event could measure not just whether SONiC worked, but whether it worked in ways that mattered to the companies actually trying to deploy it.
The testing itself was organized into three tiers. An essential test suite would validate the core features that the SONiC community had identified as critical. A scale test suite would push the system to its limits, measuring how many devices it could handle and how fast it could process data. An operations test suite would simulate real-world conditions: how the system performed under load, how it recovered from failures, and how it behaved in the leaf-spine topology that modern data centers use. The virtual format—necessary because of pandemic travel restrictions—meant participants could run tests from their own locations while working against a common testing platform.
Linkedin's head of network engineering, Shawn Zandi, framed the event as a validation moment. As an early adopter, LinkedIn had skin in the game. The plugfest offered a chance to see not just whether SONiC was ready, but how other organizations planned to use it. Microsoft's Lihua Yuan emphasized that while SONiC had won broad industry support, this was the first time the end-user community could test it under diverse conditions with multiple vendors involved. The distinction mattered: industry support and actual production readiness are not the same thing.
Keysight and AVIZ Networks built a test environment that could simulate a hyperscale data center—the kind of massive, distributed infrastructure that companies like Google and Amazon operate. The platform could scale in multiple dimensions: the number of servers, the number of switches at different layers of the network, all the way up to a full replica of how a giant data center fabric actually works. This wasn't theoretical testing. It was stress-testing SONiC the way real customers would use it.
The timing was significant. SONiC had accelerated its development throughout 2020, gaining complex features and hardening itself for deployments beyond the hyperscalers—the massive cloud companies that had originally driven its creation. But moving from hyperscaler use cases to broader enterprise adoption required proof. A plugfest, in the world of open-source networking, is that proof. It's a public, community-witnessed validation that the software works as advertised across different vendors and configurations. The results, once announced after the event concluded, would either accelerate adoption or expose gaps that needed fixing. Either way, the community would have data.
Citações Notáveis
This plugfest is an opportunity to validate SONiC readiness and to see how others plan to use SONiC in their environments.— Shawn Zandi, Head of Network Engineering at LinkedIn
While community tests have taken place, this is the first time that each of these groups have the opportunity to understand the maturity of each level of SONiC system integration from an end user's point of view.— Dean Lee, Senior Director of Cloud Solutions at Keysight Technologies
A Conversa do Hearth Outra perspectiva sobre a história
Why does it matter that this testing is happening now, in 2021? SONiC has been around for a few years already.
Because there's a difference between a project gaining momentum and a project being ready for production. SONiC had support from major companies, but most of that support came from hyperscalers—the Googles and Facebooks of the world. What enterprises wanted to know was whether it worked for them, with their hardware, their vendors, their constraints.
So this plugfest is really about proving it works outside the hyperscaler bubble.
Exactly. And not just proving it works—proving it works in a way that different vendors can all agree on. When you have a common test framework, you eliminate excuses. Everyone is measured the same way.
The source mentions this is the first time customers, vendors, and test partners are all working together on this. Why is that significant?
Because it changes the power dynamic. If vendors test their own software, they have an incentive to make the results look good. If customers test it privately, nobody else learns from it. But when you bring everyone together under the same roof, with independent testers running the same tests, the results become credible. It's peer review for infrastructure.
What happens if the plugfest reveals that SONiC isn't ready?
Then the community knows what to fix. That's actually valuable. It's better to find problems in a controlled test than to have them blow up in production. And the companies involved—LinkedIn, Yahoo! Japan, the others—they get to see exactly where the gaps are.
Does this feel like a turning point for open-source networking?
It feels like the moment when open-source networking stops being a promise and starts being a product. The infrastructure exists now. The vendors are aligned. The customers are ready. All that's left is to prove it works.