Hi there Nimit, : >>Can there be any problem if I set 10 classes each restricted to 24kbit : >>under a class which has been restricted to 128Kbit. : >> : >>My point is what happens if total of child classes, is more than the : >>parent class itself. Does it distribute fairly ie equally to all 10 : >>classes or will there be a problem. : > : > Each class should be able to het 1/10 of 128kbit. But it can be bursty. : : It can burst to some extent but I could see the rate going more than : double in some cases why is it so? In HTB, all shaping happens in the leaf classes. For ease on the CPU (and apparently, the difficulty of the algorithm), HTB is designed to believe you when you say that each of your 10 leaf classes should get 24kbit, and it does not check the parent class to make sure the parent class is throttling all of the children. You had used a 24kbit rate and no specified ceiling on each of these 10 classes. This means that you have the equivalent of 24kbit rate and 24kbit ceil. You are guaranteeing 24kbit at all times to every class! You might end up sending up to 240kbit (not accounting for your burst setting either). In order to approach better your 192kbit line with 10 classes, I would recommend trying a configuration more like this. Use a rate 16kbit and ceil 24kbit for each of your classes. This means that a leaf class will consult the parent class for leftover bandwidth above 16kbit. And above 24kbit, it will cease asking the parent to borrow bandwidth. This means that all of your classes would send a maximum of 160kbit of guaranteed traffic before consulting the parent class which has a bandwidth to divide amongst the children. : Yes, now I have removed the burst parameter but can you explain me why : to limit all bandwidth to 188 when I have 192, I am having DSL : connection. It is immaterial what sort of connection (speed) you have. The key (and secret) is that you must be the bottleneck. In order for you to control latency and bandwidth use, you must ensure that you are the slowest point. Annoyingly, the only successful way to identify exactly what speed to use as a bandwidth cap is experimentation. A good general suggestion is to lop off a couple of kbit and try capping your bandwidth exactly as Stef suggests. Try using 188kbit, and see if your apparent control increases. Best of luck, -Martin -- Martin A. Brown --- SecurePipe, Inc. --- mabrown@xxxxxxxxxxxxxx _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
