Hi all, I''ve tried quite a lot of different tc configurations. One of the key problem is how to graph the network traffic from a saved text file in order to show that PRIO works, CBQ works, etc... I have tried tcpdump and then use tcpstat to graph my results. But the results were grossly out!!! I then tried Tele Traffic Tapper and found that it tallies with my tc configuration!! I am not sure what TTT is using to sniff but apparently after i tcpdump to a file and then read off with TTT, it is grossly out again!! this implies either tcpdump not working properly or that during the writing of the data to a file, the time taken is significant!! TTT doesn''t saved its data into a file. Instead it just graphs it... prob that''s why! I''m really anxious to know what tools are you guys using to graph your results??? Regards.
Werner Almesberger
2001-Mar-27 11:55 UTC
Re: How do you know that traffic control is in place???
Rick Goh wrote:> I''m really anxious to know what tools are you guys using to graph your > results???I use tcsim ;-) You can think of tcsim as a poor man''s ns-2. tcsim uses the "real" Linux traffic control code (i.e. iproute2/tc and linux/net/sched), so it''s ideal for testing configurations. It comes with a few scripts to post-process simulation output, including plotting. ftp://icaftp.epfl.ch/pub/linux/tcng/tcsim-*.tar.gz BTW, I''d recommend using the 2.4.3-pre8 kernel, at least for tcsim, because several traffic control bugs were fixed there. - Werner -- _________________________________________________________________________ / Werner Almesberger, ICA, EPFL, CH Werner.Almesberger@epfl.ch / /_IN_N_032__Tel_+41_21_693_6621__Fax_+41_21_693_6610_____________________/