KVM
Temporary Network Bridge (USB-LAN)
The USBridge appliance can function as a plug-and-play USB-LAN adapter for the target host. This architecture allows the device to forward its own uplink connectivity (via Wi-Fi or an external USB Ethernet dongle) directly to the server through the primary USB control interface.
Core Use Cases
The USB bridge mode is strictly designed for out-of-band setup, maintenance, and recovery workflows where direct host network access is unavailable or temporarily compromised.
- Bare-Metal OS Installation: When a Windows or Linux installer lacks native drivers for the server's built-in NIC, USBridge exposes a standard USB Ethernet interface to fetch required packages and updates.
- Rescue Environments: Grants immediate network access to remote repositories and recovery images in environments where host networking is unconfigured or malfunctioning.
- Pre-OS Automation: Provides a dedicated connectivity channel for BIOS and bootloader automation tasks before the primary operating system initializes its own network stack.
Technical Characteristics
USBridge presents itself to the target host as a standard USB network interface, ensuring zero-agent operation with no proprietary driver dependencies.
| Feature | Specification |
|---|---|
| Device Type | Standard USB Ethernet emulation (CDC-ECM / RNDIS) |
| Host Dependency | None (Native OS/BIOS driver support) |
| Expected Bridging Latency (LAN) | Approximately 80–150 ms |
| Expected Bridging Latency (Wi-Fi) | Approximately 120–250 ms |
Architecture Constraints
This capability is engineered exclusively as a temporary bridge for commissioning and out-of-band recovery. It is not intended to serve as a permanent gateway for production traffic. Because the RK3566 SoC shares computational resources between network routing and video encoding, sustained high-bandwidth transfers across the USB bridge may introduce minor latency fluctuations in the UVC video stream.