红帽全球峰会23.17.10. hub Devices
hub 是一个将单个端口扩展到多个设备的设备，以便将设备连接到主机物理机器系统有更多端口。
要指定 hub 设备配置设置，请使用管理工具对域 XML 进行以下更改：
图 23.66. hub 设备
...
<devices>
<hub type='usb'/>
</devices>
...
...
<devices>
<hub type='usb'/>
</devices>
...hub 元素有一个强制属性，键入，它只能设置为 usb。hub 元素有一个可选的 sub-element 地址为，类型为='usb'，可将设备绑定到特定控制器。
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