Hello, if the parameter you want to verify is bandwidth usage, I can recomend you a Tcl/Tk application made for FreeBSD that also runs on Linux. It's called Tele Traffic Taper and it is available in http://www.csl.sony.co.jp/person/kjc/kjc/software.html. There, you can find the code; it's not difficult to install. You can also find an application useful for CBQ controls but the author has told me that some changes should be done in code to make it ran on Linux (if somebody wants to try, it could be an interesting tool :-)))) Other apps like KSnuffle can also help you. For other parameters, I can not help you :-(( See you ! Esteve Camps Hoomaan Naimi wrote: > Dear Sir, > The question exactly arises from here: > How can I monitor the impact of these several settings on the network > performance? > How can I monitor the size of the queues, log the packets dropped ,....? > I would be thankful if you recommend me some tools or APIs for doing these > tasks.