VIAVI TestCenter 400G Appliances provide comprehensive validation for data center, cloud, service provider, and enterprise networks transitioning to higher speeds. Built on the TestCenter A1, A2, A3 appliance families and dX and pX TestCenter test modules, these solutions enable engineering and operations teams to confidently design, deploy, and optimize 400G infrastructure while preparing for future migration to 800G and beyond.
400G Ethernet has become the foundation for modern data center fabrics, high-speed routing, and AI-ready infrastructures. While widely deployed, 400G networks still present significant challenges related to scale, interoperability, latency, and resiliency.
TestCenter 400G Appliances and Test Modules deliver a mature, field-proven platform for validating performance, conformance, and interoperability across Layer 2 through Layer 3. With support for multiple appliance form factors and port densities, TestCenter enables flexible testing strategies for labs, manufacturing, and live network environments.
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Comprehensive 400G TestingComplete 400G Ethernet testing across QSFP-DD interfaces
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AI/ML Workload GenerationAdvanced AI/ML testing and workload traffic generation
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Full Line-Rate ValidationIntegrated Layer 2–3 validation on a single platform at full line rate
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Advanced Performance MetricsPrecise, repeatable latency, jitter, throughput, and loss measurements
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Multi-Vendor InteroperabilityValidate 100G/200G to 400G migration across multi-vendor ecosystems
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Automated Regression TestingRegression testing for software, hardware, and topology changes
Award Winning Design
A two-time Lightwave Innovation Reviews honoree, the A1 and A3 400G platforms deliver industry-leading port density, scalability, and testing range across 400G, 200G, and 100G speeds. Supporting both PAM4 and NRZ with MACsec and Auto Negotiation & Link Training on all ports, the A1 and A3 are purpose-built for cloud and AI-driven data center validation.
Use Cases
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TestCenter 400G Appliance Family
The VIAVI TestCenter 400G appliance family gives teams a purpose-built path to validate modern high-speed Ethernet networks with the right balance of density, scale, and performance. From cost-efficient functional coverage to deep stress and interoperability testing, the A Series helps accelerate development, expand validation coverage, and confidently qualify switching, routing, and AI-ready data center infrastructures at 400G.
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A1 Appliances
Delivers high-density, cost-effective 400G validation for large-scale functional testing, regression, and broad port-count coverage. VIAVI’s A1 16-port 400G appliance is positioned as the company’s highest-density 400G QSFP-DD platform, with support for multi-speed operation, Auto Negotiation and Link Training, L2/3 routing and switching, and AI infrastructure test use cases including RoCEv2 and CCL traffic generation.
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A2 Appliances
Provides the best balance of density, flexibility, and value, making them ideal for comprehensive system validation and interoperability testing. The VIAVI A2 is a high-density 400G QSFP-DD platform at optimum price-to-performance, giving teams a practical middle ground for broad validation needs without stepping up to the highest-performance tier.
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A3 Appliances
Designed for maximum performance and scale, enabling advanced performance characterization, deeper stress testing, and more demanding validation scenarios. VIAVI’s A3 is the highest-performance 400G appliance in the appliance family, suited for teams that need to push devices, systems, and fabrics harder and extract richer performance insights.
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TestCenter 400G Chassis-Based Solutions
VIAVI TestCenter 400G chassis-based solutions deliver scalable, centralized testing for large validation environments. Combining pX3 and dX3 400G modules with the N12U Mainframe and N4U Compact chassis, they provide a flexible, slot-based architecture that grows port density, performance, and capacity as needs evolve. This modular approach supports development, interoperability, regression, and system validation within a consistent TestCenter workflow.
- pX3 TestCenter modules
High-density modules designed for scalable 400G Ethernet testing in centralized labs—ideal for large testbeds, regression, and topology scaling. - dX3 TestCenter modules
High-performance modules built for advanced validation, including system, interoperability, scale, and stress testing.
These modules are supported in VIAVI’s modular chassis platforms, including the N12U Mainframe supports high-density, centralized deployments, while the N4U Compact offers a space-efficient alternative. Together, they scale from compact setups to full 400G validation infrastructures, supporting 1G–400G modules.
- pX3 TestCenter modules
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