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FTAS 3.5 outlines EVPN VXLAN validation updates for scale and convergence

Source Decision Insights Coverage Published July 8, 2026
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FTAS 3.5 expands EVPN VXLAN validation with higher MAC and ARP scale testing, broader IPv4/IPv6 routing coverage, and enhanced convergence and failure recovery checks, plus tighter control-plane to data-plane and multi-VRF segmentation validation for large multi-tenant fabrics.

Research Overview

The release adds validation enhancements aimed at scale expansion, deterministic convergence, and deeper segmentation coverage across EVPN VXLAN data center fabrics. It frames the work around improving confidence in production behavior under steady state load and failure conditions.

FTAS 3.5 also extends validation for control-plane and data-plane consistency, with attention to route and forwarding synchronization. The goal is to strengthen repeatable regression testing in environments with high route and endpoint scale.

Key Findings

FTAS 3.5 validates up to 30K MAC and ARP entries and checks consistency between BGP advertisements and hardware forwarding behavior. It also performs EVPN Route Type 2 propagation validation alongside ARP cache synchronization across VTEPs.

Routing validation is expanded across IPv4 numbered underlay, IPv6 numbered underlay, and IPv6 unnumbered deployments. The release includes coverage up to 64K host routes and up to 128K prefix routes.

Technical Breakdown

In EVPN VXLAN scale validation, FTAS 3.5 focuses on ensuring advertised routes, ARP state, and forwarding entries remain synchronized across VTEPs. The described approach includes automated state comparison between control-plane tables and forwarding-plane tables to confirm accurate route installation and forwarding consistency.

For convergence and resiliency, FTAS 3.5 enhances testing for VTEP failure recovery, spine node failover convergence, and uplink failure handling. The scenarios validate recovery timing, forwarding stability, and packet loss characteristics.

Operational Impact

The release adds multi-VRF and segmentation validation, including port channel sub-interface and BGP peering checks across multiple VRFs. This is intended to support segmented designs where tenant isolation and uplink aggregation operate at large scale.

FTAS 3.5 strengthens monitoring and automation hardening by validating legacy monitoring with SNMP alongside modern automation workflows. It also reports automation stability improvements to reduce regression flakiness under high scale and failure conditions.

FTAS 3.5 expands scale, routing, convergence, segmentation, and monitoring validation for EVPN VXLAN deployments, pairing higher MAC and ARP testing with failure recovery scenarios and control-plane to data-plane consistency checks. Blog Signals brief is a fact-based summary of the vendor blog.

Blog post, originally published at aviznetworks.com.

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