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.
