I think he did answer your question, if you read between the lines.. A session cannot be 'pushed' to max! It needs to demand the bandwidth in the first place. Try reading this; http://trash.net/~kaber/hfsc/SIGCOM97.pdf
This along side /many/ other Internet pages allowed us to fully implement and utilise hfsc and frankly it is awesome.. It is admittedly a complex system but is very powerful and does have a few shortcomings as Henning implied. At some point I'm planning to write an hfsc how-to for our guys in the company I work for as their are a lot of 'rules' which need to be follow to write effective hfsc queues which I will post here for others when I get to it. All that said, I myself have one last question... What is the difference if any between an hfsc 'priority' and a 'prio' metric? My understanding is that the hfsc priority has a lesser effect over prio. Hfsc 'priority' has a range double that of 'prio' but seeing as VLAN TOS is mapped into prio, I make sure that my hfsc 'priority'ies map to my 'prio' values as I don't know any better. I feel your pain though as hfsc is complex, but replaces cbq, and 'red' is dead (read up about ECN (explicit congestion notification)).. Good luck.. Andy Sent from my iPhone > On 18 Oct 2013, at 18:50, Boris Goldberg <bo...@twopoint.com> wrote: > > Hello Henning, > > Friday, October 18, 2013, 5:37:23 AM, you wrote: > >>> I extensively use cbq and very confused by the current queuing manual. It >>> seems that actual speed will be somewhere between "min" and "max" (and wont >>> be equal to "bandwidth"), but how to get an idea where? > > HB> bandwidth is the target bandwidth, the actual assigned one is > HB> somewhere between min and max indeed. > > You do realize that you haven't answered the question, don't you? Your > previous email and the presentation helps a bit, but not really. > Will the actual queue speed be pushed towards "max" or "bandwidth" (and > how close) if other "siblings" are almost still? > Will the actual queue speed be pushed towards "min" or "bandwidth" (and > how close) if other "siblings" are extremely busy? > Other tips to migrate extensive cbq queues (with borrowing) would be > very helpful and appreciated. > > -- > Best regards, > Boris mailto:bo...@twopoint.com
