These release notes for ExtremeCloud Tunnel Concentrator version 25.04.01, issued in October 2025, outlines new features, resolved issues, known issues, and documentation resources. This release introduces controls that let you manage the amount of broadcast and multicast traffic that crosses Tunnel Concentrator, the ability to disable ARP Proxy for deployments that are managed by ExtremeCloud IQ, and improvements to packet captures whereby captures for the bridge and listening interface are combined in a single capture file. The document provides links to installation, configuration, and maintenance guides, and offers multiple channels for obtaining technical support and subscribing to product announcements.