Mikael, Any chance you can repeat the tests using multi and broadcast traffic? May not be enough clients...
Thanks! Chris. On Friday, October 16, 2015, Mikael Abrahamsson <[email protected]> wrote: > > Hello. > > I have spent a large chunk of today doing wifi testing with the quagga > implementation of homenet isis. > https://plus.google.com/110006881111138232905/posts/UwYS9h2n7eM > > I have been using iperf3 sending 2 megabit/s of UDP: > > iperf3 -l 1400 -R -u -b 10M -t 6000 -c 10.0.58.140 > > The setup is that I set up a WDR4900 with one connection to the Internet > (not really relevant), and one wired connection to an Ubuntu machine. I > then set up two additional WDR4900 on my sons tricycle, plus a laptop. > > +----W1-----+R1 > C1 +----+R3 + > + + > +----W0-----+R2+---+C2 > > C1-R3, R2-C2, R1-R2 are wired connections. > > W0 is 5GHz radio. > W1 is 2.4GHz radio. > > I'm running all radios at 10mW. > > If I position the setup just outside the room the R3 is located in, W0 has > better SNR and lower metric, and is thus used. As I move further away from > R3, W1 will start to get better SNR compared to W0, as W0 is degrading more > per physical distance compared to W1. > > Generally I only see very little packet loss as long as at least one of > the radios has decent radio performance. I can go back and forth between W0 > and W1 being the best radio with usually just 0-10 packets lost out of 893 > packets per second, usually it's 0-3. > > I spent part of the day doing testing between laptop and a VM on my normal > laptop, but I just in the past hour discovered that this VM causes packet > loss. I replaced it with another computer and now all the spurious packet > loss I was seeing before even using cable, is gone. > > So this is a very simple setup, and it's also loop-free at least in one > direction, traffic R3->C2 is loop-free either via R2 and R1, whereas R2->C1 > can loop at R1 until R1 has converged its routing table due to a change > received from R2. > > Also, the above UDP test is only in one direction. How should I record the > testing, should I have two sessions, one in each direction, and just log > the results to file, so we see per-second result of packets sent/received > and packet delay variance (iperf3 will give a value there). > > I mean, from setting up everything and then just powering it up and moving > it around, it basically "just works". I can move the rig out of coverage, > it'll connect and start working as soon as the radios are up, and when > there is a lower SNR radio, it'll move to it without any major packet loss. > > I could for instance make a screen shot video of 10 minutes of testing > with all the values scrolling, on the screen including the homenet web > "bubble" diagram in the corner somewhere, and "ip monitor" running so the > metrics can be seen continously. > > Suggestions for tests greatly appreciated. > > -- > Mikael Abrahamsson email: [email protected] > > _______________________________________________ > homenet mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/homenet > -- Chris Elliott CCIE # 2013 “You and I are mirages that perceive themselves” --Douglas Hofstadter
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