Hi, I have a cable modem with a bandwidth capped upload rate. I'd like to prioritize packets going outbound according to the TOS header of the IP field. I've read through the LARTC Howto several times, and I think I have a good feel for the information it it. It also seems that what I'm trying to do is pretty straight-forward and common. Unfortunately, the HOWTO doesn't seem to have a good answer for this simple problem, nor have I been able work out how to do this from wading through a lot of other documentation. It appears that the pfifo_fast qdisc has most of what I want - prioritizing by TOS header. Unfortunately, it is a "work conserving" queue, and won't work with my cable modem unless I can artificially slow down the link. The tbf qdisc seems like it has the second part of what I want - an artificial upload cap. Unfortunately, it doesn't do prioritizing. I'm using just the tbf qdisc right now with decent results, but it still isn't exactly what I want - sometimes bulk connections will cause latency for interactive sessions and I find that my maximum upload rate is slightly impaired on bulk connections. So the question is, how do I successfully combine the above two qdiscs? Ideally, I'd like to have three queues (interactive, normal, and bulk) like pfifo_fast has, with maximum latencies (or queue size) for each of the queues (eg, 50ms, 100ms, 500ms respectively). And then prioritize the queues so that interactive data is always taken first and bulk data last. It would seem the htb qdisc has what I want. Unfortunately, the documentation (in both the howto and the htb website) all describe complicated scenarios where I need something much simpler. Also, I can't seem to find the answer to simple questions like - how do I set the maximum queue size (and/or maximum latency) for a qdisc that is a child of an HTB qdisc? Any help would be appreciated. If I can get this going, I'd be happy to contribute a section in the HOWTO for this. (And, I think it would make a good addition as this seems like a common task.) -Kevin -- ------------------------------------------------------------------------ | Kevin O'Connor "BTW, IMHO we need a FAQ for | | kevin@xxxxxxxxxxxx 'IMHO', 'FAQ', 'BTW', etc. !" | ------------------------------------------------------------------------ _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
