[ovs-discuss] QoS

[Ben Pfaff]

On Fri, May 13, 2016 at 11:19:19PM -0700, Aravind Ganesan wrote:
> I have created QoS classes, and am able to separate the traffic based on
> source address.
> What I want to do now is enable QoS classes only when link is congested.
> For example, if there are 3 hosts, h1, h2, h3, connected by single switch
> s1.  Suppose h1 is sending file to h3. Simultaneously h2 wants to send file
> to h3. I measure the bandwidth of s1->h3. If it is less than say 100 Mbps,
> I invoke QoS class and give priority to packets from h2.
> Is it possible to do this?

OVS can't do that directly, but there's not much value in it anyway
because most QoS strategies don't do anything if the link is not
congested.