On Thu, Feb 23, 2006 at 06:38:09PM +1000, Russell Stuart wrote: > For example, lets say we have a 1000kbit link, and two > classes sharing that link: > > - Voip - ie high prio real time, and > - Web - background traffic. Have you measured this link, i.e. when there is no activity and you start some Voip sessions, do they get a constant downstream of 1000kbit? It may very well be that you have to measure the real throughput and then go a little lower (since you have to be the bottleneck), however having to throw 30% of bandwidth away sounds a bit too harsh to me. > Guaranteed Rate Ceiling Prio > Link 700kbit 700kbit > |--Voip 200kbit 700kbit 1 > \--Web 300kbit 700kbit 2 Are there other classes as well, because the sum of Voip + Web rate is just 500kbit, where the parent class offers 700kbit? You should make sure that the sum of child class rates equals the parent class rate. HTB results get more predictable that way. > To be more precise, I want to create some "headroom" that > VOIP can use, but Web traffic can't. Usually, this "headroom" is the rate. In your example, Voip has 200kbit of bandwidth guaranteed. Web traffic can't use it unless of course there is no Voip traffic at all. Another way of indirect headroom would be to hard limit the Web class, i.e. give the Web class a lower ceil than the other classes. This way, there is bandwidth that the Web class can't use no matter what, even if the link is completely empty. Regards Andreas Klauer _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
