On Monday 29 March 2004 01:44, Roy wrote: > > > Q2. What happens if the SUM of all the clients' class RATE > (+ > > the > > > > > default class RATE) is bigger than 256kbit? Will HTB > > work > > > correctly? > > Yes. > > -------- > > This is incorrect: > > of course it will work more or less, but nearly same as without > > any shaping > It will work more then you think. On the short term, traffic can be bursty > for the different classes, but each one will belimited to 8kbit. But on > the long term, each class will get the same share of bandwidth. > ------ > basicaly this may work if difference is not big, There is one thing I learned: each setup and problem requires a different aproaches. Sometimes, you can shape without being the bottlenek, sometimes you can"t. > but it was not working for me, I was trying to set rate 8kbit for everyone, > since the sum of rates was 3 times biger than parent ceil, trafic was > divided in unpredictable way. > then I set rate to 1 kbit and everything worked well filling syslog by > warnings that quantum is too small. > > logicaly this should not work because htb guarantee the rate amount trafic, > so what if there is not so much available? I 'm afraid the answer depends also on the client. The client that pushes the most, will get the most. > I'm not sure but, isn't quanum only used for leaf classes? So the quantum > of > parent classes doesn't mather ? > --------- > You may be right, since I did not checked source code for this, but > logicaly quantum is very significant part > and shoud work everywhere, I suppose quantum is about same as cburst, but > even more significant, > sems it is only way to divide bandwitch between classes with some > proportion. Quantum is only used if each child class is sending the configured rate and the parent class has some bandwidth left. So if sum (rate of child classes) = parent rate, quantum is never used. The class with the lowest prio will get the remaining bandwidth, so the configured rate is the minimum rate of a class. > ----------------- > I found strange limitation, if class have leafs, then I cant attach sfq to > it. You can, but it will never be used. > where will go unclasified packets from that class? Into root's default? In previous versions, it hangs your system. I think the packets are send in the :0 class, this is a passthru class. Stef -- stef.coene@xxxxxxxxx "Using Linux as bandwidth manager" http://www.docum.org/ #lartc @ irc.openprojects.net _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
