Comment 1 for bug 1796410

i am rather conflicted on how to triage this bug.

while still possible the use of the vif quotas e.g.
quota:vif_inbound_average='4882813', quota:vif_outbound_average='4882813'

is strongly discuraged in favour of neuton qos policies.

they are not supported by all hyperviors and the range of values may be hyperviour specific.
beyond the interop concerns these options also have no effect for ovs-dpdk vpp or other vhost-user based VIF and likely do not work for hardware offloaded ovs or directmode sriov.

with that in mind however we have not deprecated the bandwith io quotas as such they should still be supported to at least some degree.

i think we should really consider deprecateing the option in Stein and remove in the T release.
for now however we should also update the documention to refect the valid range and direct people to the neutron qos policies instead.