[pox-dev] Modifying existing flows on a switch periodically

[Murphy McCauley]

Set your flow-mod's .command attribute to OFPFC_MODIFY (or OFPFC_MODIFY_STRICT).  If you've imported libopenflow as "of" (the POX convention), it's something like:

fm = of.ofp_flow_mod()
...
fm.command = of.OFPFC_MODIFY_STRICT
...
connection.send(fm)


-- Murphy

On Dec 15, 2013, at 10:16 PM, Sadia Bashir <11msccssbashir at seecs.edu.pk> wrote:

> Thank you Junaid Khalid and Murphy!
> 
> I just got this from pox.openflow.libopenflow_o1
> 
> ofp_flow_mod_command_rev_map = {
>   'OFPFC_ADD'           : 0,
>   'OFPFC_MODIFY'        : 1,
>   'OFPFC_MODIFY_STRICT' : 2,
>   'OFPFC_DELETE'        : 3,
>   'OFPFC_DELETE_STRICT' : 4,
> }
> 
> 
> I am not getting clear how do I use it in flow-mods. Please refer me to some example for it. Thank you for your guide and help. Thanks a lot!
> 
> sadia
> 
> 
> On Mon, Dec 16, 2013 at 7:20 AM, Murphy McCauley <murphy.mccauley at gmail.com> wrote:
> On Dec 14, 2013, at 1:56 PM, Sadia Bashir <11msccssbashir at seecs.edu.pk> wrote:
> 
> > Hi,
> >
> > I want to modify queue_id in installed flows on a switch periodically by sending a flow_mod message from controller(i.e., controller-to-switch message) I tried it using this way on pox-controller:
> >
> > def _timer_func ():
> >     for connection in core.openflow._connections.values():
> >            connection.send(of.ofp_action_nw_tos(port = 1, queue_id = 2))
> 
> This isn’t a flow-mod.  This is just an action!  Construct flow mods for the flows you want to change and include the new action.
> 
> > def launch():
> >      from pox.lib.recoco import Timer
> >      Timer(4, _timer_func, recurring=True)
> >
> > Please tell me if there is a way to modify a value in already existing flow entries on the switch.
> >
> > Thanks in advance for any hint or help.
> > --
> > sadia
> 
> Hope that helps.
> 
> — Murphy
> 
> 
> 
> -- 
> 
>  

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.noxrepo.org/pipermail/pox-dev-noxrepo.org/attachments/20131215/df05a324/attachment-0002.htm>