There is lot of HFSQ info around the net, just use google. Some fine examples: http://www.cs.cmu.edu/~hzhang/papers/SIGCOM97.pdf - A Hierarchical Fair Service Curve Algorithm for LinkSharing, RealTime and Priority Services https://calomel.org/pf_hfsc.html - Hierarchical Fair Service Curve (HFSC) of OpenBSD http://www.openbsd.org/faq/pf/queueing.html - PF: Packet Queueing and Prioritization The last two are not linux implementations, but may put some light into the qdisc itself. Greets, Ivan -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html