Ramin Alidousti wrote: > > Thanks Stef :-) > > On Fri, Jun 15, 2001 at 07:57:12AM +0200, Stef Coene wrote: > > > - allot 1514 cell 8 maxburst 10 avpkt 1000 : forget these options for > > now, just set them > > That's exactly what I meant. > > > - split 1:0 defmap c0 : ? ? ? ? Maybe to split the traffic? I never > > needed this options, so I don't know what this mean. Just forget this > > option for now. > > You will never need something when you don't know of its existance ;-) > > > > A small note on all these options would have saved me a lot of guess-work. > > Better? ;-) > > Yes. Much better :-) > > > > But anyway, don't take me wrong. I think that iproute2 is one of the coolest > > > networking tools I've ever seen. > > Me to, you can do great things with CBQ but it really sucks and is not > > accurate enough. > > Why do you need accuracy when you're doing "Traffic Engineering" ;-) I did some tests : I tried to give 2 hosts a bandwidth og 128kbit/s. Host A needs 75% of this bandwidth and host B 25%. They share the same 128kbit/s so they may borrow unused bandwidth. The only way to do this is to create a qdisc on a bounded class of 128kbit/s (I tried all other things and this was the only way to get it working). On this qdisc you can attach 2 classes for the two hosts with appropriate optiones and it works perfect. Host A gets 75% of the bandwidth and they can borrow bandwidth. BUT, the problem is the bounded class and qdisc. I did some tests and CBQ is very bad when it has to bound a class, but the problem is that you need a bounded class with his rate equal to the link-bandwidth. You can find some nice pictures on my website and they are very clear (http://users.belgacom.net/staf/qos/tests/cbq/bounded/bounded-accuracy.html): CBQ is not accurate when bounding a class. So it's working but not accurate enough. There are some other problems, but this the most inportant. So if anyone out there has other results or find a solution, plz let us know. I did a lot of testing and I'm surre I didn't made a mistake. I made all the possible combinations of options, and each time it was not working like I wanted to. -- Stef More QOS info : http://users.belgacom.net/staf/
