On Thu, Jun 13, 2013 at 01:17:39PM -0400, jinho hwang wrote:
> On Thu, Jun 13, 2013 at 12:16 PM, Ben Pfaff <b...@nicira.com> wrote:
> 
> > On Thu, Jun 13, 2013 at 10:37:49AM -0400, jinho hwang wrote:
> > > I am new to ovs. I am trying to set up userspace switch using
> > > INSTALL.userspace. There are many commands to add bridge and interfaces
> > > using ovs-vsctl, but ovs-vsctl does not return (infinite loop). How do I
> > > have to run these commands? Just ctrl-c is ok? I may not have a good
> > > understanding of the system yet. If you can refer me to any good
> > > documentation related to this, it would be appreciated as well.
> >
> > Is ovs-vswitchd running?
> >
> 
> Thanks, Ben.
> 
> I have figured out how the system works now. I thought ovs-vsctl does not
> return to the user, but it was controlled by ovs-vswtichd that signals to
> close. Like you said, my fault was that I did not run ovs-vswitchd
> properly.
> 
> A couple of more questions if you can provide some more information:
> 
> 1. Logging:
> ovs-aptctl shows all INFO in file column, but I can not find any file
> logging messages. Not in /var/log and in /usr/local/var/log/
> Is there any global knob I should control?

Use --log-file, see the manpage for details.

> 2. Userspace datapath:
> - Does this mean netdev is used by datapath?

Yes.

> - If so, how can I query stat information of datapath? Is there even one to
> query? I want to see something like "ovs-dpctl show br0", if there is one.

You can use "ovs-appctl dpif/show".

> - What are the limitations if I use userspace datapath? I know performance
> can not be good, and some functionalities (tunneling) may not work. Right?

Yes.
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