Comment 9 for bug 1730605

Reviewed: https://review.openstack.org/519573
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=c43317e380d90a9b1eab4f3c5058b770b43dcf96
Submitter: Zuul
Branch: master

commit c43317e380d90a9b1eab4f3c5058b770b43dcf96
Author: Zachary <mazengxie@126.com>
Date: Tue Nov 14 15:48:54 2017 +0800

    [Qos] ingress bandwidth limit by ovs is not accurate

    According to Open vSwitch FAQ [1], max-rate value which is set for
    all queues in qos is set as link speed in case when it is not specified.
    This can lead to inaccurate ingress bandwidth limits in case when QoS is
    applied e.g. directly on tapXXX port (which is "tun" interface type) and
    configured bandwidth limit is higher than interface's link_speed.
    This patch set max-rate parameter in qos's other_config table to not use
    default value determined by Open vSwitch and to make rate limits more
    accurate.

    The modification is covered by functional tests in
    https://github.com/openstack/neutron/blob/master/neutron/tests/
    functional/agent/test_ovs_lib.py.

    [1] http://docs.openvswitch.org/en/latest/faq/qos/

    Change-Id: Id937216a724fbf776298efd11f74ac71056cfe06
    Closes-Bug: #1730605