On 2014-02-17 12:08, kirill wrote: > > On 17.02.2014 14:20, Felix Fietkau wrote: >> On 2014-02-17 10:46, kirill wrote: >>> Most of the stations us 2.4 GHz frequency band now. So the environment >>> is rather noisy. It leads to a packet loss rate increase. >>> I've changed my Fragmentation Threshold to 400 and RTS/CTS Threshold to >>> 40. After a weeks of testing I have 0% packet loss. This values probably >>> are not optimal, but it solves the problem. >> Just out of curiosity: What hardware, what OpenWrt version, and what >> kind of client devices (802.11n capable or not) are you using? > Router is TP_LINK TL_WR1043ND running ATTITUDE ADJUSTMENT (12.09, r36088) > Laptop has Intel 4965agn card You might already be able to get much better wireless behavior by trying out a more recent version (e.g. current trunk). Maybe your config change will turn out to be completely unnecessary, maybe not.
>>> I think that most users will benefit from changing default settings. >> I strongly disagree. Just one data point of an environment with >> significant packet loss is no reason to strongly reduce throughput in >> the default settings for everybody else. > I did some testing: > Copy ~2GB file from NFS storage (ordinary PC connected via gigabit Ethernet) > With new values: 9.1 MB/s > Old values (both reset 2400 > Ethernet MTU): 9.1 MB/s > And I see no throughput reduce. May be my test case is wrong. It would > be nice to see yours. > BTW, How many stations around you use 2.4 GHz frequency? I'm not speaking based on one random test that I did at home, I'm speaking from experience of knowing the protocol, maintaining wireless drivers and working with many different setups and environments. Comparing fragmentation on wireless to MTU changes on ethernet makes no sense whatsoever. 802.11 behaves *very* differently. > My point is: > 1. Most 2.4 Ghz band users are in noisy environment > 2. Packet loss slows down many applications (youtube is probably the > most common one) significantly > 3. I have a solution that works for me. May be it will help others. May > be there is a better one You still assume way too much about how similar your setup might be compared to other people's setups. - Felix _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
