If a QoS config is working on actual 9K hardware, but throwing an error on XRv9K, the issue is almost certainly a less-than-complete emulation of the hardware’s data plane. When the XR control plane tries to program a QoS policy that is unsupported b...

The data plane of the XRv9K is, of course, implemented in software, but in order to re-use as much of the ASR9K's code as possible, the XRv9K software data plane emulates the A9K forwarding hardware to some degree (allows re-use of the API calls to t...