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Arista Networks details FTAS 2.3 updates for soniC with expanded EVPN and VXLAN testing

Source Decision Insights Coverage Published November 29, 2025 Companies 3
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3 companies named across 6 categories, one of 228 articles referencing Sonic. Previous coverage: SONiC details open-source networking capabilities for scalable AI infrastructure (Nov 2025).

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Arista Networks has released version 2.3 of its Fabric Test Automation Suite (FTAS), which aims to enhance evaluation protocols for SONiC deployments in Data Center Interconnect (DCI) scenarios. This update is relevant to enterprise IT and security professionals seeking validation of scalable, resilient network configurations before production launch.

Research Overview

FTAS 2.3 integrates new test cases focusing on Ethernet Virtual Private Network (VPN) (EVPN) and Virtual Extensible LAN (VXLAN) technologies, critical components for extending Layer 2 connectivity over Layer 3 infrastructures. The suite also deepens coverage for Multi-Chassis Link Aggregation Group (LAG) (MCLAG) configurations, addressing redundancy and failover behavior.

The update responds to evolving SONiC versions and incorporates insights from customer deployments to align testing with operational environments. Emphasis is placed on DCI use cases that require coordinated management of EVPN VXLAN overlays, MCLAG redundancy, and Equal-Cost Multipath (ECMP) routing.

Technical Breakdown

FTAS 2.3 includes automated scenarios validating dynamic MaC and IP address learning, link failure recovery, and routing protocol convergence within VXLAN EVPN fabrics. MCLAG tests examine steady-state operation, member and peer link failures, as well as active/standby node reboots, simulating real-world failover conditions.

ECMP assessments have been expanded to test up to 64 ECMP paths and support eBGP scalability for route counts reaching 128,000. These parameters verify SONiC's capacity to maintain load balancing and fault tolerance across high-density, evolving network topologies.

Operational Impact

Through comprehensive test coverage across multiple SONiC-compatible hardware platforms, FTAS 2.3 evaluates interoperability, scalability, and resilience under failure scenarios. Enterprises can leverage this framework to mitigate risk associated with network outages and deployment delays.

The suite's ability to simulate link events, router failures, and protocol transitions supports validation of recovery mechanisms essential for data center fabrics supporting AI/ML workloads and cloud-scale applications.

Summary

FTAS 2.3 extends SONiC readiness testing by encompassing refined EVPN VXLAN overlays, MCLAG failover scenarios, and ECMP scalability validations. This release offers enterprises a structured approach to verifying network robustness and flexibility prior to deployment, aiming to reduce unexpected disruptions and enhance confidence in open networking environments.

This Blog Signals brief is a factual summary of the latest FTAS update as announced by Arista Networks.

Blog post, originally published by Naresh Kumar at Aviz Networks.

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