Thank you for your answer. You're right. I also figured out that precising the qdisc kind of solves the problem. Thus, I make sure to configure the queue length in htb so the default queue length of a bridge is overwritten. On Sat, Feb 13, 2016 at 12:00 AM, Andy Furniss <adf.lists@xxxxxxxxx> wrote: > Ewa Janczukowicz wrote: >> >> Ok, I have just realized by doing ifconfig that the queue length of >> my bridge (br0) was 0. So I suppose this was causing the problem. >> >> However I still do not know whant happens it I use htb and netem in >> the above configuration and e.g. I change the queue length of htb to >> 1000. Will it be applicable to both netem and htb queueus? Or will I >> have one two queues of 1000, on after another. >> >> Thank you in advance. > > > Not sure about that specifically. > > Maybe you don't even need htb as netem now has a rate option which will > be useful to emulate bitrate latency and wasn't there when I tried this > around a decade ago. > > I am not sure whether or not netem will work with stab (which lets you > accurately add ATM/PPP overheads). > > With htb you can specify child qdiscs anyway to control length, I don't > know about netem - if you can't find a way you could try changing txqlen > on br0/eth0 with ip link set ... > > If bridging doesn't work out for some reason you can double queue using ifb. > > > >> On Thu, Feb 11, 2016 at 11:34 AM, Ewa Janczukowicz >> <janczukowicz.ewa@xxxxxxxxx> wrote: >>> >>> Hello, >>> >>> I want to emulate ADSL link behaviour. For that I decided to use >>> netem and configure its rate and delay parameters. >>> >>> Additionally I test different queuing configurations e.g. htb. >>> Since if I use htb, I can only configure netem on leaves, I decided >>> to create a virtual bridge. As a results I have the following >>> configuration: - I have virtual bridge (br0) and I attached the >>> phycical inerface to it. - On virtual bridge I configure htb - On >>> physical interface I configure netem. >>> >>> However using htb and netem changes the queue size. >>> >>> If I only use htb, the queue size is 1000. The same happens if I >>> only use netem. However when I use both of them, the queue size >>> becomes much shorter. >>> >>> Is there any way I can check what queue size is configured? I know >>> I can overwrite this configuration, however finally I am not sure >>> how netem and htb interact and what queue I configure. >>> >>> Thank you in advance for any help. >> >> -- To unsubscribe from this list: send the line "unsubscribe lartc" >> in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo >> info at http://vger.kernel.org/majordomo-info.html >> > -- To unsubscribe from this list: send the line "unsubscribe lartc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
