Avnu Alliance Plugfest: Why Test Speed, Automation and Insight Matter More Than Ever

Avnu Alliance Spring Plugfest is a central event in the development of interoperable, low-latency, high-reliability networking standards. VIAVI is a key member of the Avnu Alliance, contributing to testing events, governance, and the ongoing evolution of Time-Sensitive Networking (TSN), including leading test plan development for standards such as IEEE 802.1CB and 802.1Qci.

As TSN adoption accelerates across industries, Plugfest is increasingly where theory meets reality. The challenge is no longer just defining standards but validating them quickly and confidently across multi-vendor environments. This shift puts a spotlight on test speed, automation and the ability to gain actionable insight in real time.

Key Industry Trends from Plugfest

Several clear trends emerged over the course of the week, reflecting both the maturity of TSN and the challenges that remain as adoption scales.

• TSN has moved beyond “emerging” status: TSN is no longer a future-facing technology, it is being actively deployed today. What was once discussed in terms of potential is now visible in real-world implementations, with multi-vendor networks carrying live traffic in production-like environments.

• Adoption is expanding across industries: While the professional AV market continues to lead through initiatives such as the Milan profile, strong momentum is now visible in industrial automation. At this Plugfest, multiple Avnu members demonstrated real industrial application traffic running over TSN networks. Beyond this, automotive and aerospace sectors are advancing quickly, with ongoing work in defining standards and certification frameworks through Avnu working groups.

• Device management and automation are still catching up: In contrast to protocol conformance, which is progressing well, device management and automation capabilities remain less mature across the ecosystem. This gap is a natural part of the adoption cycle as we move from specification to deployment, but it also highlights where the industry must focus next.

• Interoperability events are accelerating real-world readiness: Plugfest continues to play a critical role in bridging the gap between standards and deployment. By bringing multi-vendor implementations together under real conditions, it enables faster identification of issues and greater confidence as technologies transition into production environments.

TTworkbench TSN Test Suite and TestCenter M1 Appliance

Plugfest reinforced a familiar reality: standards on paper and standards in silicon are two very different things. Written specifications leave room for interpretation, and incompatibilities only surface when multi-vendor devices interact under real network conditions.

To address this challenge, VIAVI showcased two complementary platforms: the TTworkbench TSN test suite and the TestCenter M1 Appliance, both recently recognized as Avnu Certification Test Tools (CTTs) for IEEE 802.1AS.

At Plugfest, these tools directly tackled one of the biggest bottlenecks on the test floor: time spent diagnosing issues.

Instead of relying on traditional log analysis, which can take hours to isolate root causes, TTworkbench and the TestCenter M1 Appliance provide real-time, graphical visibility into network behavior. Engineers were able to immediately see gate timing and scheduling interactions, packet priority and traffic flow behavior, and live packet exchanges across devices.

This reduced troubleshooting cycles from hours to minutes, enabling teams to iterate faster and test more device combinations within the limited Plugfest timeframe.

Equally important, the platforms enabled a shift from pass/fail testing to actionable insight. Rather than simply identifying whether a test succeeded or failed, engineers could quickly understand why issues occurred, critical in an environment where rapid iteration and cross-vendor collaboration are essential.

The response from engineers across multiple companies was telling. Many stopped to engage with the tools, recognizing a shared pain point: the industry has long relied on slow, log-based debugging methods that struggle to keep pace with the increasing complexity of TSN deployments.

Plugfest made it clear that as TSN adoption scales, test speed, automation and visibility are no longer optional. They are essential to maintaining productivity and ensuring confidence in multi-vendor interoperability.

Three Key Takeaways

Three key insights from Plugfest highlight how testing requirements are evolving as TSN adoption scales:

• Test speed directly impacts productivity: In a time-constrained environment like Plugfest, execution speed determines how much meaningful work can be completed. Faster test cycles enabled VIAVI’s platforms to validate more device combinations, accelerating interoperability progress within the same timeframe.

• Standards expertise accelerates problem resolution: Being directly involved in developing Avnu test plans fundamentally changed onsite interactions. Engineers were able to resolve issues faster by engaging with VIAVI as both a tool provider and a contributor to the standards themselves, bringing greater confidence to proposed fixes and design changes.

• Pass/fail is no longer enough. Insight is essential: As TSN implementations grow more complex, engineers need more than a binary result. Rapid access to why a test failed, particularly in environments where time is limited and configurations frequently change, is critical to maintaining momentum and avoiding delays.

Beyond the Plugfest

While these benefits were clearly visible during the event, the implications extend far beyond Plugfest itself. In day-to-day development, device manufacturers, silicon vendors, and test labs face the same core challenges: reducing time to certification, minimizing manual effort, and ensuring interoperability in increasingly complex, multi-vendor environments.

VIAVI’s integrated test platforms address these challenges by enabling:

• Faster certification cycles through automated, repeatable testing
• Reduced setup and manual intervention, lowering operational overhead
• Greater confidence in interoperability, before products reach deployment

Because these solutions are aligned with official Avnu conformance test plans, they go beyond basic compliance validation. They provide assurance that devices will perform reliably…not just in isolated tests, but in real-world, multi-vendor deployments.

As TSN adoption continues to expand across industries, the ability to combine speed, automation, and deep visibility will be critical across the entire product lifecycle.

Additional Resources

Read more here for further insight into TSN testing and the challenges associated with latency, QoS, synchronization and scalability.

For those we didn’t connect with at Plugfest, VIAVI will be participating in upcoming Avnu events and looks forward to continuing the conversation.