Hi Linus, Simon, Testing with static routes yields the same result. After thorough testing, i found strange throughput pattern on one of my radio. It's my hardware problem after all. Phew... Thanks a lot for your input. I appreciate it.
Rgds, Jack. On Thu, Oct 17, 2013 at 12:28 PM, Linus Lüssing <[email protected]> wrote: > Hi Jack, > > One more test could be interesting: What throughput do you get > with static routes over the wifi interfaces directly, without > batman-adv? > > Just to check whether it's batman-adv's fault or something else > (e.g. cheap, unshielded wifi chips, a bug in the test setup / > configuration). > > Cheers, Linus > > > On Thu, Oct 17, 2013 at 11:21:57AM +0800, Zaki wrote: >> Hi Linus, >> >> From A to B(radio 1) it is 5.24GHz. Throughput is 40Mbps. >> >> From B(radio 2) to C it is 2.412GHz. >> Throughput is 38Mbps. >> >> From A to C the throughput is just 20Mbps. >> >> Thanks. >> Jack. >> >> On Mon, Oct 14, 2013 at 11:37 PM, Linus Lüssing <[email protected]> >> wrote: >> > Hi Jack, >> > >> > what is the throughput you get from B to C? What was the >> > throughput you got on the 2.4GHz link alone? Did you change to >> > 2.4GHz on A-B or B-C? >> > >> > Cheers, Linus >> > >> > >> > On Mon, Oct 14, 2013 at 09:26:41AM +0800, Zaki wrote: >> >> Hi Simon, >> >> >> >> Thanks for your reply. I am using omni antenna right now and what i >> >> got when i did an iPerf from A to C is only 20Mbps. It looks like the >> >> throughput is cut to half (just like a single radio mesh). Tried 2.4G >> >> frequency in one of the pair, had the same result too. Anything in >> >> terms of setting of batman-adv i can look for?. >> >> >> >> Rgds, >> >> Jack >> >> >> >> On Sun, Oct 13, 2013 at 10:36 PM, Simon Wunderlich >> >> <[email protected]> wrote: >> >> > Hi Zaki/Jack, >> >> > >> >> > On Fri, Oct 11, 2013 at 11:11:04AM +0800, Zaki wrote: >> >> >> Hi, >> >> >> >> >> >> I am a newbie in batman-adv. I got a question regarding Hops and >> >> >> Throughput, especially in regards with a collocated dual-radio device. >> >> >> Hopefully somebody could offer some help here for me to fully >> >> >> understand batman-adv operation. I have 3 devices, namely A, B and C. >> >> >> >> >> >> A is only having single radio (operating at Freq 5.20G in AdHoc mode). >> >> >> Put this under bat0. Bridge bat0 with eth0. >> >> >> B is having dual-radio (radio1 operates at 5.20G in AdHoc mode, radio2 >> >> >> is at 5.24G in AdHoc mode). Put these under bat0. Bridge bat0 with >> >> >> eth0 >> >> >> C is like A (single radio, operating at 5.24G in AdHoc mode). Put this >> >> >> under bat0. Bridge bat0 with eth0. >> >> >> >> >> >> So, the wireless link will be like this : >> >> >> >> >> >> [A]::::::::::::::: [B(radio1)---B(radio2)]::::::::::::::::[C] >> >> >> >> >> >> 1) If i were to ping from A to C, how many hops is it considered?. Is >> >> >> it 2 hops or 3 hops?. >> >> > >> >> > that would be two hops. One hop is considered traversing one link, and >> >> > you have two links here. >> >> > >> >> >> 2) If my Iperf TCP throughput from A to B is 40Mbps, what is the >> >> >> expected throughput of Iperf from A to C ?. >> >> > >> >> > That depends. If the links are not interferring, you should get approx. >> >> > the maximum of both link throughputs. So if one link is 30 mbit/s, the >> >> > second >> >> > is 25 mbit/s, that whole path would yield 25 mbit/s - there might be tcp >> >> > effects further decreasing throughput (latency etc). >> >> > >> >> > However you use two frequencies adjacent to each other. If you use omni >> >> > antennas, expect a lot of interferences (even if the channels are not >> >> > overlapping). If you use directional antennas you should be fine. >> >> > >> >> > Cheers, >> >> > Simon >> >> > >> >> > >> >> >> >> >> >> Thanks a lot. >> >> >> >> >> >> Jack.
