I'm not aware of a way to do quite what you describe. Port stats include drops and errors, but there's no way to tell what type of packets (TCP, UDP, etc.) were involved... the port doesn't care, after all. Flow stats include byte and packet counters, but not drops and errors.
If you're willing to ignore drops and errors, I think you can pretty much do what you want. For each class of flows you're interested in, install a table entry. For example, if you're interested in TCP flows from port 4, install an entry which matches that, and then query that flow's statistics. Doing more complex statistics (e.g., independent TX and RX counters) can probably be accomplished on Open vSwitch by using multiple tables (e.g., one table for RX and another for TX). Alternatively, you could install narrow flows (i.e., exact matches), and sum the results in the controller yourself. Hope that helps. -- Murphy On Dec 1, 2013, at 9:37 PM, Sadia Bashir <11msccssbas...@seecs.edu.pk> wrote: > Thank you so much for your guide Murphy. Yeah the "Example - Web Flow > Statistics" helped me to count flows but port statistics is still not getting > cleared up. I want to get count values for rx_packets, rx_dropped, rx_errors > etc individually from a specific port based on packet type such as tcp, udp, > ip, arp, icmp, source/destination IP/MAC addresses etc. > > I looked into flow_stats.py example here > https://github.com/hip2b2/poxstuff/blob/master/flow_stats.py and checked out > some previous posts regarding getting port statistics but couldn't get what I > am looking for . > Please tell me if there is a way possible to get port statistics based on a > certain condition as I described above. > > Thank you for any hints/help. > > Kind Regards; > > > > > > On Fri, Nov 29, 2013 at 9:47 AM, Murphy McCauley <murphy.mccau...@gmail.com> > wrote: > A good starting point might be "Example - Web Flow Statistics" in the POX > manual. > > As far as uniquely identifying a flow, the original idea was to use the match > itself (since it certainly should identify the flow). There's also a flow > "cookie". In OpenFlow 1.0, this was only useful in very limited contexts, > but has become more useful with Nicira extensions and higher versions of > OpenFlow. > > -- Murphy > > On Nov 27, 2013, at 6:59 PM, Sadia Bashir <11msccssbas...@seecs.edu.pk> wrote: > > > Hi everyone, > > > > I want controller to get flow statistics from a switch such as the > > count-value associated with each flow installed on a switch, how do I > > uniquely identify a flow and then retrieve associated statistics. > > > > I am using Dart branch for POX-Controller, which files should I look into > > in order to get an idea in this regard. > > > > Thank you for your help. > > -- > > Sadia > > > > -- > >
