Corey, I believe that what I said previously is not correct. Marcio has corrected me.
By passing the necessary information to the addLink, the restrictions will be applied. I honestly didn't remember about this... For that, I apologise if I have mislead you. My regards, Carlos On 7 September 2017 at 12:37, Marcio Minicz <marciomin...@gmail.com> wrote: > Carlos, > > Emulation and simulation is not the same thing. > > Any way, look this two links: > https://github.com/mininet/mininet/wiki/pdf/mininet-hifi-bdh2.pdf > https://reproducingnetworkresearch.wordpress.com/ > > And explore the parameters bw, delay, loss and max_queue_size in the Mininet > addLink. > > Regards, > > Minicz > > 2017-09-07 7:51 GMT-03:00 Carlos Ferreira <carlosmf...@gmail.com>: >> >> Hello again Mr. Ross, >> >> Yes, you are correct. An emulator should emulate every single aspect >> of a network, from network equipment's to network links. That is why >> simulators such as NS3 and Opnet exist. >> But mininet is a different type of emulator. It uses OpenVSwitch and >> the Linux kernel software bridges to "emulate" the network. I >> emphasise the "emulate" because there's no real emulation of a >> network. Its just a bunch of software switches logically connected to >> software bridges, moving memory pointers from one interface to the >> other. >> This is why you won't see any packet errors or collisions. Regarding >> the packet losses, I'm pretty sure that will only happen if the system >> runs out of memory, since the packets aren't really moving in memory >> when crossing interfaces... it's just pointers at the end of the day. >> >> >> On 7 September 2017 at 09:57, corey ross <coreyvr...@gmail.com> wrote: >> >> I don't think there will ever be any packet drops or network >> >> >> >> congestion, since all network adaptors are software adaptors. >> > >> > >> > Mr. Ferreira but I thought mininet is an emulator! shouldn't a netowrk >> > emulator behave like a real world network? >> > >> > -------------- >> > >> > Mr. Iwase thanks for your reply. I think the rx_dropped, tx_dropped, and >> > collisions are the values that I need. >> > >> > Would you also guide me on what is the best way to calculate the overall >> > packet drops and congestion in the network for a period of time (because >> > there are 9 switches and each switch have number of ports)? should I >> > take >> > the average these values or you suggest any other methods to calculate >> > the >> > packet drops and congestion? >> > >> > >> > On Thu, Sep 7, 2017 at 5:52 AM, Iwase Yusuke <iwase.yusu...@gmail.com> >> > wrote: >> >> >> >> Hi, >> >> >> >> Excuse me for jumping in. >> >> >> >> I don't know whether it is able to reproduce drops or network >> >> congestion >> >> on mininet, but for getting their statistics, you can use OFPPortStats >> >> request and reply. >> >> >> >> >> >> >> >> http://ryu.readthedocs.io/en/latest/ofproto_v1_3_ref.html#ryu.ofproto.ofproto_v1_3_parser.OFPPortStatsReply >> >> >> >> Thanks, >> >> Iwase >> >> >> > >> > >> > ------------------------------------------------------------------------------ >> > Check out the vibrant tech community on one of the world's most >> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> > _______________________________________________ >> > Ryu-devel mailing list >> > Ryu-devel@lists.sourceforge.net >> > https://lists.sourceforge.net/lists/listinfo/ryu-devel >> > >> >> >> >> -- >> >> 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 >> >> >> ------------------------------------------------------------------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> _______________________________________________ >> Ryu-devel mailing list >> Ryu-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/ryu-devel > > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Ryu-devel mailing list Ryu-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ryu-devel
