No part of the POX framework tracks counter values. You can ask the switches to send results. Switches send the counters. You can see the counters the switches send. That's it. For more information on OpenFlow's counters, see the OpenFlow specification.
-- Murphy On Dec 12, 2014, at 12:03 AM, nor masri sahri <masri.sa...@gmail.com> wrote: > hi all, when POX decide the forwarding rules, it has capability to send > statistic request message to gather per flow statistic (duration, bytes, > packet count,etc) from all OF switches. For example during initialization, at > t=1, the value of bytes counter of OF switch is 10, so the controller update > the counter value in the controller to 10. At t=2, the value has change to > 30, so when the controller get the new value updated by the switches, it will > replace the previous value (10) to new value (30). > My question is, how the controller decide to update the counter value for > each flow entries it stored in the controller? How is the value replacement > mechanism?for example, does it use EWMA (moving average calculation) to > replace to new value? please advice, thanks > > -- > Regards, > > masri.sahri >
