Re: [Ryu-devel] [RYU] Delete flow entry basing on priority

[IWAMOTO T. <iw...@va...>]

At Tue, 30 Aug 2016 19:40:20 +0700,
Quân Nguyễn Thanh wrote:
> 
> [1  <text/plain; UTF-8 (quoted-printable)>]
> Hi,
> 
> It doesn't work. When I use with OFPFC_DELETE option, it remove all flow
> entry.
> I also try remove by ovs-ofctl command on openvswitch.
> 
> # ovs-ofctl del-flows s3 "priority=50" -O OpenFlow13
> ovs-ofctl: unknown keyword priority
> 
> It means that openvswitch doesn't support, right?

The short answer would be you cannot do what you want with a single
openflow command.

I checked the OpenFlow spec.
The priority field is used by OFPFC_DELETE_STRICT messages but not by
OFPFC_DELETE messages. And OFPFC_DELETE_STRICT messages don't do
wildcard matches.

You'll need to dump the entire flow table (OFPFlowStatsRequest) and
filter by priority in your python code.

> On Tue, Aug 30, 2016 at 10:35 AM, IWAMOTO Toshihiro <iw...@va...>
> wrote:
> 
> > At Tue, 30 Aug 2016 11:49:27 +0900,
> > Iwase Yusuke wrote:
> > >
> > > Hi,
> > >
> > > Please CC ryu...@li... and keep this mailing this.
> > >
> > > How about specifying out_port=ofproto.OFPP_ANY and
> > out_group=ofproto.OFPG_ANY
> > > to OFPFlowMod message?
> > >    e.g.)
> > >      mod = parser.OFPFlowMod(datapath=datapath, cookie=0,
> > >                              priority=priority,
> > >                              out_port=ofproto.OFPP_ANY,
> > >                              out_group=ofproto.OFPG_ANY,
> > >                              command=ofproto.OFPFC_DELETE_STRICT)
> > >
> > > Thunks,
> > > Iwase
> >
> > Use OFPFC_DELETE instead of OFPFC_DELETE_STRICT?
> >
> > >
> > > On 2016年08月30日 09:44, Quân Nguyễn Thanh wrote:
> > > > Hi Iwase Yusuke,
> > > >
> > > > Sorry, if I borther you.
> > > > I'm using OF1.3 with RYU, I would like to remove flow entry basing on
> > the
> > > > priority at all. As below function, but it doesn't work, could you
> > please
> > > > point out my mistake?
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > *def del_flow(self, datapath, priority):        ofproto =
> > > > datapath.ofproto        parser = datapath.ofproto_parser        #match
> > =
> > > > {}        mod = parser.OFPFlowMod(            datapath=datapath,
> > cookie=0,
> > > > priority=priority,             command=ofproto.OFPFC_DELETE_STRICT)
> > > > datapath.send_msg(mod)*
> > > >
> > > > Thank you for your help.
> > > >
> > >
> > > ------------------------------------------------------------
> > ------------------
> > > _______________________________________________
> > > Ryu-devel mailing list
> > > Ryu...@li...
> > > https://lists.sourceforge.net/lists/listinfo/ryu-devel
> >
> 
> 
> 
> -- 
> Best regards,
> Quan Nguyen
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