On 9 Oct 2017, at 12:15, Moh'd Reza Abbasi <mr.mrabb...@gmail.com> wrote:
> 
> I would like to know how can I ensure that flow_mods sent to the switches are 
> processed by the switches before sending another batch of flow_mods. 

Look for the ‘Barrier Message’.  In my OF v1.4.1 doc, it is section 7.3.7.  It 
has a reply component which can be used to then send flow_mods to the other 
switch.

> 
> For e.g I want to insert rules on the switches 1, 2, 3, 4 in two steps. 
> First, the controller should insert the rules on the switches 1-3, 
> ONLY after the controller is sure that these switches have processed the 
> flow_mods then insert the rule on the switch no.4.
> 
> I would appreciate any feedback.
> 
> Regards Reza.
> 


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