This release notes document for ExtremeCloud IQ (Classic) version 25.15.0-53 (October 2026) provides technical information on new platform capabilities, supported software and hardware, resolved defects, known issues, and deployment requirements for cloud-managed wired and wireless networking environments. The release introduces Fabric Engine/VOSS 9.4.2 support, enabling onboarding, monitoring, configuration management, image management, and firmware distribution for supported Universal Switch and VSP platforms. It details compatibility with IQ Engine 10.9.2, Switch Engine 33.6, Fabric Engine/VOSS 9.4.x, ExtremeCloud IQ Site Engine, CoPilot, and A3 integrations, including SSO-enabled management, licensing, telemetry, and device lifecycle operations. Addressed issues include CAPWAP timeout failures, user authentication and account-unlocking errors, access point template creation problems, and dashboard reporting inaccuracies. Known issues describe API behavior changes, configuration audit limitations, SSO session persistence problems, firmware upgrade logging gaps, telemetry inconsistencies, AP configuration restrictions, stack-management caveats, and upgrade migration dependencies. The release notes also provide browser and firmware prerequisites, supported device matrices, troubleshooting workarounds, configuration considerations such as Supplemental CLI usage, interoperability guidance for Site Engine and A3 deployments, and operational recommendations for enterprise-scale network administration, making the content suitable for intermediate to advanced network engineers, administrators, and technical support personnel responsible for deployment, upgrades, monitoring, and troubleshooting.
