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6.3. PCI passthrough device type field

The Compute service categorizes PCI devices into one of three types, depending on the capabilities the devices report. The following lists the valid values that you can set the device_type field to:

The device supports SR-IOV and is the parent or root device. Specify this device type to passthrough a device that supports SR-IOV in its entirety.
The device is a child device of a device that supports SR-IOV.
The device does not support SR-IOV. This is the default device type if the device_type field is not set.

You must configure the Compute and Controller nodes with the same device_type.