Configuring Remote Desktop Features

Configuring Device Splitting Policy Settings for Composite USB Devices
Composite USB devices consist of a combination of two or more dierent devices, such as a video input
device and a storage device or a microphone and a mouse device. If you want to allow one or more of the
components to be available for redirection, you can split the composite device into its component interfaces,
exclude certain interfaces from redirection and include others.
You can set a policy that automatically splits composite devices. If automatic device spliing does not work
for a specic device, or if automatic spliing does not produce the results your application requires, you can
split composite devices manually.
Automatic Device Splitting
If you enable automatic device spliing Horizon 7 aempts to split the functions, or devices, in a composite
device according to the lter rules that are in eect. For example, a dictation microphone might be split
automatically so that the mouse device remains local to the client, but the rest of the devices are forwarded
to the remote desktop.
The following table shows how the value of the Allow Auto Device Splitting seing determines whether
Horizon Client aempts to split composite USB devices automatically. By default, automatic spliing is
disabled.
Table 4‑4. Effect of Combining Disable Automatic Splitting Policies
Allow Auto Device Splitting Policy
on Horizon Agent
Allow Auto Device Splitting Policy
on Horizon Client
Combined Effective Allow Auto
Device Splitting Policy
Allow - Default Client Setting false (automatic spliing disabled)
Automatic spliing disabled
Allow - Default Client Setting true (automatic spliing enabled)
Automatic spliing enabled
Allow - Default Client Setting
Not dened Automatic spliing enabled
Allow - Override Client Setting
Any or not dened Automatic spliing enabled
Not dened Not dened Automatic spliing disabled
N These policies are included in the Horizon Agent Conguration ADMX template le. The ADMX
template le is named (vdm_agent.admx).
By default, Horizon 7 disables automatic spliing, and excludes any audio-output, keyboard, mouse, or
smart-card components of a composite USB device from redirection.
Horizon 7 applies the device spliing policy seings before it applies any lter policy seings. If you have
enabled automatic spliing and do not explicitly exclude a composite USB device from being split by
specifying its vendor and product IDs, Horizon 7 examines each interface of the composite USB device to
decide which interfaces should be excluded or included according to the lter policy seings. If you have
disabled automatic device spliing and do not explicitly specify the vendor and product IDs of a composite
USB device that you want to split, Horizon 7 applies the lter policy seings to the entire device.
If you enable automatic spliing, you can use the Exclude Vid/Pid Device From Split policy to specify the
composite USB devices that you want to exclude from spliing.
Chapter 4 Using USB Devices with Remote Desktops and Applications
VMware, Inc. 77