Hello, I'm asking some questions about the configuration of the queueing discipline with tc and the implementation in the kernel. 1) What is the difference between the pfifo an bfifo queues ? 2) It seems that we can configure two queueing disciplines on a interface. Indeed, ingress seems to have a particular behavior. You can give two different informations : tc qdisc add dev eth0 root handle 10: cbq ...... tc qdisc add dev eth0 ingress ...... In tc command, we can use "ingress" instead of "root" parameter. Well, in fact, i don't really understand the utility of ingress in that case !! Can anybody explains this ? Thanks, Laurent Foucher