Hi, I''m trying to figure out how to use Linux QoS. Default setting has three queues (bands) and should prioretise outgoing tarffic based on TOS field. I try to test that by flooding Ethernet interface by netperf or iptraf and running ping -f with -Q and without Q. -Q doesn''t affect ping results, it suffers anyway. It seems that I don''t understand something. I verified that -Q traffic goes through higher prority queue. I can make it work if I shape traffic at lower priority queue, but I would like to avoid that, becuase can''t always predict bandidth of connection. I would appreciate any insight on that. Thanks, Serge. ____________________________________________________________________________________ We have the perfect Group for you. Check out the handy changes to Yahoo! Groups (http://groups.yahoo.com)
Sergiy Lozovsky wrote:> Hi, > > I''m trying to figure out how to use Linux QoS. Default > setting has three queues (bands) and should prioretise > outgoing tarffic based on TOS field. I try to test > that by flooding Ethernet interface by netperf or > iptraf and running ping -f with -Q and without Q. -Q > doesn''t affect ping results, it suffers anyway. It > seems that I don''t understand something. I verified > that -Q traffic goes through higher prority queue. > > I can make it work if I shape traffic at lower > priority queue, but I would like to avoid that, > becuase can''t always predict bandidth of connection. > > I would appreciate any insight on that.Works for me - well if you don''t shape then you will have a nic driver dependant buffer after the queue maybe yours is bigger - but if you start enough tcps to get a big backlog then you should be able see the difference. Andy.