These release notes for ExtremeCloud Tunnel Concentrator version 25.03.01, issued in August 2025, outlines new features, resolved issues, known issues, and documentation resources. This release introduces the ability to run a backup of a Tunnel Concentrator instance. The document provides links to installation, configuration, and maintenance guides, and offers multiple channels for obtaining technical support and subscribing to product announcements. The AB revision includes updates to the list of Resolved and Known Issues.