Overview
USB4™ brings high-speed connectivity and advanced tunneling capabilities to modern Windows devices. To help developers and IT professionals visualize and manage USB4 topologies, Windows provides the USB4 domain viewer via the Windows device portal.
Key Features of the USB4 Domain Viewer
- Topology Visualization
- Displays USB4 host routers (in green) and device routers (in blue).
- Supports click-and-drag navigation and zooming for detailed inspection.
- Automatically updates as the topology changes.
- Host Router Details
- Each host router includes Name, VendorId, and DeviceId.
- Selecting a router reveals additional details in the sidebar.
- Device Router Details
- Shows adapters and ports, distinguishing in-use adapters from unused ones.
- Selecting an adapter highlights it with a red circle for quick identification.
- Tunnel Visualization
- Tunnels between device routers are illustrated clearly.
- Each tunnel uses a colon-separated unique ID (e.g., 8:1:1:9) for easy reference.
- Context-Specific Sidebar
- Updates dynamically based on selected elements (routers, adapters, tunnels).
- Allows collapsing or expanding details for streamlined viewing.
Why It Matters
The USB4 Domain Viewer simplifies troubleshooting and topology analysis for OEMs, IHVs, and developers. By providing real-time visualization and granular details, it accelerates debugging and ensures compliance with USB4 standards.
Getting Started
Access the USB4 Domain Viewer through the Windows Device Portal on supported devices. For more details, visit the official Microsoft Learn documentation.
© 2025 Microsoft. USB4®, USB Type-C® and USB-C®, USB 2.0 Type-C™ are registered trademarks of USB Implementers Forum, Inc. Thunderbolt™ is a trademark of Intel Corporation. This article is not endorsed by or affiliated with USB-IF.