(2014¦~07¤ë22¤é 18:45), Dickens wrote:
> Hi,
> My goal is to calculate the traffics from flows and switch ports.
> So that, I try to get the counts, set the tx_bytes, rx_bytes(port stats), and
> bytes_count(flow stats) with zero, but I¡¦m stuck with sending by RESTful api.
>
> I trace the Ryu source code and openflow spec, it seems Ryu support the
> OPFlowMod with attributes.
> But, is there any way to do that by using RESTful api?
1) set to zero the counts of "port stats"
As far as I know, it is impossible in the spec of OpenFlow.
2) set to zero the counts of "flow stats"
Is possible.
When sending a flow_mod, please set to "4" flags.
"4" means OFPFF RESET COUNTS.
OF 1.3.4 spec (6.4 Flow Table Modification Messages) says:
If the OFPFF_RESET_COUNTS flag is set, the flow entry counters must be
cleared.
Examples are as follows.
curl -d '{"cookie": "1",
"dpid": "1",
"priority": "23999",
"idle_timeout": "0",
"hard_timeout": "0",
"flags":"4",
"table_id": "0",
"match": {"in_port": "1"},
"actions": [{"type":"OUTPUT","port":"5"}]}'
http://127.0.0.1:8080/stats/flowentry/modify";
> Or any suggestions to do calculating the traffic?
I would like suggest the following, what do you think?
1. get stats
2. wait for a certain period of time
3. get stats again
4. calculates the difference between 1 and 3
>
> Thanks for your answering.
>
>
>
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