20.16.11. Hub Devices
A hub is a device that expands a single port into several so that there are more ports available to connect devices to a host physical machine system.
To specify the hub devices configuration settings, use a management tool to make the following changes to the domain XML:
... <devices> <hub type='usb'/> </devices> ...
Figure 20.55. Hub devices
The hub element has one mandatory attribute, the type whose value can only be
usb. The hub element has an optional sub-element
type='usb'which can tie the device to a particular controller.