HFSC doesn't support strict priorities (and neither does HTB, the priorities just affect unused bandwidth and is still limited by the ceiling). At least in the case of HFSC this is intentional, strict priority is not very friendly because it allows traffic to be entirely excluded, HFSC's goals are to enable flexible sharing by allowing to seperately specify bandwidth and delay requirements. If you really want strict priority you can use the prio qdisc as _child_ of HFSC.
I always forget this about the prio and HTB. With HSFC does use of the the max latency settings possibly get the desired goal from using prio? I think this is what always appealed to me about HSFC from the little I could understand. That if I had an interactive class, it'd always favor getting those packets through sooner than others, trying to honor a latency, if I set it up correctly.
> What is there for good HSFC documentation out there right now anyways? There is the original papers by Hui Zhang et al., which is mostly about the theory and not very suitable for users - but still worth reading if you're not scared by use of some math. There used to be some documentation called "HFSC for Router Plugins", which is partially applicable for Linux .. and some ALTQ and *BSD documentation which is partially applicable as well. Besides that there seem to be a few german student research projects about this subject, but all I know of are in german. Last thing I know of is an article written by a friend of mine for the german Linux Magazin, unfortunately also only in german, but reviewed by myself and mostly correct (klaus.geekserver.net/hfsc/hfsc.html) - translations are welcome :)
Unfortunately the original papers were a bit too confusing for me when I last read them. I could understand parts of it, but translating that into hsfc options I would actually want to use, I couldn't do. This german article looks like it'd have a lot of the clerification I'd need, but a babelfish translation was still too difficult to understand. If someone's up for writing a good translation I'd greatly appreciate it. - Jody _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
