Thank you for your answer Zoltan. I'm actually working with OF1.4. I don't see a reason to not add acknowledgment messages. Increase of complexity is not really a good excuse simply because, yes the protocol may be simpler but the software implementation complexity increases.
I hop this changes in the future. I would also like to contribute with proposals but I don't know how, without paying to become a ONF member. On 6 May 2014 13:07, Zoltán Lajos Kis <zoltan.lajos....@ericsson.com> wrote: > Hi Carlos, > > > > I definitely agree with you that a positive acknowledgement is needed in > OpenFlow; especially since the introduction of groups (and meters). In fact > I made a proposal more than two years ago in ONF for this feature. Some > were objecting it, as it would add complexity to the protocol, or as > barriers can already provide similar function. So this feature never got > into the specification. > > > > My guess is that most people are still using OpenFlow in an OF 1.0 style, > and so are fine without acknowledgements of any sort. Now that we are > getting more and more OF 1.3 features supported in both controllers and > switches I hope people will start using those features and realize the need > for a light-weight positive acknowledgements. > > > > For now you can use barrier request/reply after messages to get the > acknowledgment, or in OF 1.4 you execute one or more messages within a > bundle. > > > > Regards, > > Zoltan > > > > > > *From:* openflow-discuss [mailto: > openflow-discuss-boun...@lists.stanford.edu] *On Behalf Of *Carlos > Ferreira > *Sent:* Monday, May 05, 2014 7:35 PM > *To:* openflow-discuss@lists.stanford.edu > *Subject:* [openflow-discuss] OFP_FLOW_MOD response from OF Switch to > Controller. > > > > Hi! > > Can anyone explain me why is that in the specs, there are error messages > specified to respond to a bad configuration but, there is no specification > for a simple OK of ACK message for a good configuration. > > Is there a good reason or a good programming principle for not specifying > OK responses for successful configuration operations? > > > > -- > > > > Carlos Miguel Ferreira > > Researcher at Telecommunications Institute > > Aveiro - Portugal > > Work E-mail - c...@av.it.pt > > Skype & GTalk -> carlosmf...@gmail.com > > LinkedIn -> http://www.linkedin.com/in/carlosmferreira > -- Carlos Miguel Ferreira Researcher at Telecommunications Institute Aveiro - Portugal Work E-mail - c...@av.it.pt Skype & GTalk -> carlosmf...@gmail.com LinkedIn -> http://www.linkedin.com/in/carlosmferreira
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