thanks Murphy for your attention
i have another question, i want send, request_port_stats for 2 port of a
switch(port_no=3, port_no=4), in pox, I want send my request twice within
five seconds for both(port_no=3, port_no=4),also, I have
written _handle_portstats_received(event) method out of class , and
writhed core.openflow.addListenerByName("PortStatsReceived",
_handle_portstats_received) in the lunch method. my question is how can i
send my request for 2 port, twice within five seconds? and i want
_handle_portstats_received method show report for Both time and for both
port?
can you body help me?
On Tue, Oct 28, 2014 at 11:25 AM, Murphy McCauley <murphy.mccau...@gmail.com
> wrote:
> I think this has come up a number of times in the past few years on
> nox-dev, pox-dev, and openflow-discuss. For example, see:
>
> https://www.mail-archive.com/pox-dev@lists.noxrepo.org/msg01244.html
>
> The basic idea is that you sample the counters at time A and you sample
> them at time B, subtract the first from the second and then divide by the
> time between samples. The biggest gotcha here is that it assumes the
> traffic to and from the switch for the counter request/response, the
> processing in the switch, and the processing in the controller take equal
> time for each sample. Depending on your needs for accuracy, you may want
> to implement a strategy for detecting/mitigating the variance.
>
> Alternatively, if your switch supports some other monitoring system, it
> may be more suitable for this task. For example, IPFIX puts a timestamp in
> the report packets, so variance in communication time between switch and
> controller and within the controller don't matter.
>
> -- Murphy
>
> On Oct 28, 2014, at 12:16 AM, saeedeh karami <saeedehkaram...@gmail.com>
> wrote:
>
> hi all,
> i have some information about flow on links(for example, links between
> s1 and s2) by run of flow-state-request function in pox, now i want know,
> how can i calculate traffic rate with this data?
> can any body help me?
>
> On Mon, Oct 27, 2014 at 4:47 PM, saeedeh karami <saeedehkaram...@gmail.com
> > wrote:
>
>>
>> hi all,
>> i have some information about flow on links(for example, links between
>> s1 and s2) by run of flow-state-request function in pox, now i want know,
>> how can i calculate traffic rate with this data?
>> can any body help me?
>> --
>> SaeedehKarami
>>
>
>
>
> --
> SaeedehKarami
>
>
>
--
SaeedehKarami
