[ovs-discuss] general question with configuration and qos

Justin Pettit jpettit at nicira.com
Thu Apr 8 07:43:05 UTC 2010

Hi, Patrick.  Open vSwitch, itself, does not provide a way to centralize configuration of virtual ports and VMs.  Since OVS supports the OpenFlow protocol, it is possible to write such an application on a platform such as NOX (http://noxrepo.org).  As discussed in the paper, we have written such an application, but it is not available as an open source project.

OVS has supported traffic policing for quite a while.  If you are using one of the "official" releases, you should find a description of how to configure it in the "Interface Rate-Limiting" section of the ovs-vswitchd.conf man page.  If you are working from the "master" branch of the git tree, then you will need a special incantation for ovs-vsctl command, since it's not documented yet.  Let us know if you need that soon, and we'll bump up documenting it on our priority list.  In general, we've found that tuning policing to do what you want is kind of tricky, so it will take some trial and error.

Getting around to adding QoS support has taken a lot longer than we'd hoped.  We have an internal deadline that will require it in the next couple of months.  Stay tuned, and we should have some announcements about that before too long.


On Apr 7, 2010, at 10:50 AM, Patrick Mullaney wrote:

> Hi,
> I've started to successfully use openvswitch with kvm for basic
> communication between VMs. The paper "Extending Networking
> into the Virtualizaiton Layer" implied that there was a
> centrailized cli that supported uniquely mapping virtual
> ports and VMs. Also in the paper, it mentions supporting
> QOS several times and I'm having trouble finding any
> support in that area. I'm looking for configuration of
> traffic shaping/policing and not just matching or setting
> of the priority bits. I should mention that I'm currently
> using the unstable 99.2 release. Any pointers would be
> greatly appreciated.
> Thanks.
> Patrick
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> discuss at openvswitch.org
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