Comment 1 for bug 1787792

That would IMO require to implement classful bandwidth limits but as for now I don't think we have resources to implement that.
If You would like to work on that - it would be great. I can of course help You with that as much as it will be possible.
We have Neutron QoS meetings on IRC every second Tuesday (http://eavesdrop.openstack.org/#Neutron_QoS_Meeting) - if You have any questions or You wants to discuss that, You are welcome :)