[ovs-dev] asking about flow rate limiting feature

[Justin Pettit]

I doubt FlowVisor speaks Open vSwitch's configuration protocol, but that would be a question better suited to the FlowVisor mailing list:

	http://mailman.stanford.edu/mailman/listinfo/flowvisor-users

If you just want to make those changes remotely, you can use ovs-vsctl over TCP/SSL.  You'll just need to tell ovsdb-server to listen with the appropriate method.  For example:

	ovs-vsctl set-manager ptcp:6634

Then, when you want to remotely configure OVS, tell ovs-vsctl to use that connection method.  Something like:

	ovs-vsctl --db tcp:<ip_of_ovs>:6634 set port eth0 qos <blah,blah,blah>

I didn't test those commands, so they may be slightly off, but it should point you in the right direction.

--Justin


On Aug 31, 2011, at 4:01 AM, Trinh Minh Tri wrote:

> Dear Mr Justin!
>  
> I followed your suggestion and can set the qos for each flow but completely on openflow switch.
> Now I want to periodically change the rate provide to each queue. I mean if I have a program that can calculate the best rate providing to each queue and base on that program result I want to change the rate set to each queue periodically (e.g time interval = 5 mins).
> I intend to implement it in FlowVisor. So, is it possible to control the queue rate of openvswitch from FlowVisor?
> Could you suggest me the part in openvswitch that I can send the command from outside to control?
>  
> Thank you very much
> Trinh Minh Tri
>  
>  
> On Tue, Aug 30, 2011 at 1:19 PM, Justin Pettit <jpettit at nicira.com> wrote:
> This is a bit trickier, but it's certainly possible.  First, you'll need to configure queues on the egress ports.  You can see how to do this in the "Quality of Service (QoS)" section of the ovs-vsctl man page:
> 
>        http://openvswitch.org/cgi-bin/ovsman.cgi?page=utilities%2Fovs-vsctl.8
> 
> Then, you can add flows with the "enqueue" action from your controller or the ovs-ofctl command.  The enqueue action takes the port number and the queue id you configured earlier.  You can see some documentation about the enqueue action in the OpenFlow spec or the ovs-ofctl man page:
> 
>        http://openvswitch.org/cgi-bin/ovsman.cgi?page=utilities%2Fovs-ofctl.8
> 
> Good luck!
> 
> --Justin
> 
> 
> On Aug 29, 2011, at 8:58 PM, Trinh Minh Tri wrote:
> 
> > Dear openvswitch dev!
> >
> > I'm newbie in openvswitch but feel very interested in it to set up my experimental evvironment. In my experiment, I need to use the flow rate limiting feature to limit the rate of each flow comming in to openvswitch. I have searched in the openvswitch website and found out this document of QoS rate limiting http://openvswitch.org/?page_id=267. But this document only limit the rate for all traffic entering the openvswitch port. I would like to ask whether is there any solution in openvswitch to classify the traffic as flow and apply the QoS rate limiting to each flow.
> >
> > Thank you very much
> > Trinh Minh Tri
> >
> >
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> 
>