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

[Murphy McCauley]

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