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When used in conjunction with USB device splitting (see below), the configuration options can be very powerful. USB device filtering is often used by companies to disable the use of mass storage devices on virtualized desktops, or perhaps to block a specific device which a user never wants to be forwarded (e.g., USB-to-Ethernet adapter).Ĭomplex filter rules can be constructed – for example, to disallow all products from a specific vendor, except for a specific device model. Administrative group policy (GPOs) can be applied, too, allowing company-wide configurations to be applied across all or some desktops. These rules can be applied locally at the client, or at the virtualized desktop. USB device filtering allows specific devices, device families (e.g., storage devices), or vendor product models to be restricted from being forwarded to the virtualized desktop. In general, most devices redirect correctly, although, depending on latency, the performance may be slower than if they were connected locally. These devices will therefore present problems for redirection.

Some security USB devices explicitly check if they are plugged into a local machine and are not being redirected.

If the network latency causes messages to exceed these timeouts, then the device may not work.

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Some third-party device drivers contain internal timeouts.Note that they should not be forwarded via USB redirection as that has the same issues as identified above. See Real-Time Audio-Video (RTAV) for Horizon View Blog Post for more information. Webcams are now supported via the Real-Time Audio-Video functionality which ships as part of Feature Pack 2. Testing in our lab shows that some webcams running at 640×480 at 15 fps can consume 62Mbps! Therefore, redirected webcams are unsuitable for large-scale use. Webcams typically send uncompressed images, which require a huge amount of bandwidth. Some may work, but it is not recommended to use them at any scale. Webcams are not officially supported in Horizon View via USB redirection.However, some devices are not designed to work in a virtualized environment.

Horizon View does not implement anything to explicitly block USB devices from working. USB Device Support in Virtual Environments

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This support was added to the Linux and Arm clients in v1.5, and more recently we added it to the Mac OSX client in v1.7.

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The Horizon View Windows client v5.1 and later supports the new USB redirection functionality. The latest Horizon View clients can be downloaded from here. Horizon View Clients to Support New USB Redirection Features

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The driver for a device does not need to be installed on the client machine.įor details about USB device redirection in Horizon View, read on.

Devices that reset themselves during operation are automatically re-forwarded (notably, Blackberry or iPhone system updates, SanDisk Cruzer, and IronKey).

A splitting mechanism allowing complex composite USB devices to be partially forwarded.

These filtering rules can be applied locally on a client or via administrative policy using GPOs.

A new filtering mechanism on the client and agent, which allows specific devices to be blocked from redirection.

Broader device support, adding devices such as SanDisk Cruzer and IronKey.

Integration with other VMware components (allowing devices to be used between VMware applications, such as between Horizon View, VMware Workstation, and VMware Fusion).

Recent enhancements in VMware View 5.1 have greatly improved device compatibility as well as support for USB redirection on Windows, Mac, and Linux hosts.Īt a high level, the changes between VMware View 5.0 and 5.1 include: The USB device driver needs to be installed on the VDI desktop (but it does not need installing on the client machine). The USB device is redirected from the physical device to the virtual desktop using network redirection of the USB request block (URB). USB Redirection Changes in VMware View 5.1 USB device redirection is functionality in Horizon View that allows the USB device to be connected to the virtualized desktop as if it had been physically plugged into it. If you are working in a VDI environment such as VMware Horizon View*, you may want to use your USB devices in that virtualized desktop too. We are all used to USB devices on laptop or desktop machines. With the EUC Solutions Management and Technical Marketing team What Is USB Device Redirection?

By Peter Brown, Senior R&D Manager, VMware, London, UK