[ovs-discuss] Openflow Port Status

S Suresh sureshkumarr.s at gmail.com
Tue Jul 23 02:09:15 UTC 2019


Hi Ben,

My reply inlined.

>Or are you saying that, when
>you take the link down, you get an "up" and then a "down" message
>quickly in succession?
YES. I see when i bring the link down, i get UP and then DOWN message.

Thanks
Suresh.



> On Mon, Jul 22, 2019 at 09:34:46PM +0530, S Suresh wrote:
> > Hi Ben,
> >
> > My test environment is,
> > Mininet, RYU SDN Controller.
> >
> > 2) Mininet shell provides the "link" command , which brings downs the
> link
> > between two switches(port interfaces).
> > mininet>link s1 s2 down
> > which brings the s1 to s2 link down (s1 port connected to s2)
> >
> > 3) Captured the open flow messages in Wire shark, as well as in RYU SDN
> > Controller.
> >
> > Thanks
> > Suresh
> >
> >
> >
> >
> >
> >
> >
> > On Mon, Jul 22, 2019 at 9:15 PM Ben Pfaff <blp at ovn.org> wrote:
> >
> > > On Mon, Jul 22, 2019 at 10:02:33AM +0530, S Suresh wrote:
> > > > I am testing the Openflow Port Status message.
> > > >
> > > > My observations are as follows,
> > > > 1)
> > > > When the port(switch s1, port 1) is down.
> > > > (Note: i was expecting only one PORT Status message with PORT DOWN
> set)
> > > > But I have received two OpenFlow Port Status messages.
> > > > The first message shows  PORT UP (for S1 , port 1).
> > > > Immediately , the second message show PORT DOWN (for S1 , port1).
> > > >
> > > > Is it correct behavior?
> > >
> > > It's surprising behavior.
> > >
> > > Can you explain how to reproduce it?
> > >
>
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