> the linux box uses redhat 7.2 with 2.4.18 kernel patched with htb 2 + bridge firewalling, i have 60 htb classes (from 64 to 512 kbit)each with sqf leaf and I am using U32 filter to select source, destination or port.I also have some firewalling iptables rules. I tested the setup for 15 days and then put it in production enviroment since it was very urgent for me. I am very happy with the erformance and it seems to be rock solid. I read something about htb3 and the new aproachso I was thinking to swithch to htb3. > Daes somebody have some results about htb3 stability in production? > In what shall I expect improvement? Somebody out there did the same thing? You can stay with versio 2 if you are ok. The main difference in htb3 is speed and ability to handle large number of classes. Qualitative parameters should be the same. devik