Hi, I think the closest thing that openflow can provide would be information about how many bytes have been sent on one side and received on the other side of a link. So you could infer an approximation of active rates on the link by polling 2 neighboring switches from NOX at some regular intervals. This can not be very accurate because there are factors like round-trip-times for the requests/replies from NOX to the 2 switches and back, these times will be different, also there are packets travelling between the switches that should be taken into account etc. But this is definitely a place to start if you want to do such measurements from NOX.
The "monitoring" component on the destiny branch (netapps/monitoring) does something like that (it regularly polls all switches for all kinds of statistics), so it's a good place to look at. 2011/6/29 Min-Hyup KANG <kang-min-h...@hanmail.net> > Hi, > > > I would like to measure bandwidth between switches. > > > I am reading openflow spec 1.0, but there are not existing exactly. > > > please can you give me some tips ? > > > > Best Regards, > Min-Hyup KANG > > <kang-min-h...@hanmail.net> > _______________________________________________ > nox-dev mailing list > nox-dev@noxrepo.org > http://noxrepo.org/mailman/listinfo/nox-dev > >
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