[Cake] [Bloat] [Cerowrt-devel] heisenbug: dslreports 16 flow test vs cablemodems

[Alan Jenkins]

On 18/05/15 16:09, dpreed at reed.com wrote:
>
> I'm curious as to why one would need low priority class if you were 
> using fq_codel?  Are the LEDBAT flows indistinguishable?  Is there no 
> congestion signalling (no drops, no ECN)? The main reason I ask is 
> that end-to-end flows should share capacity well enough without 
> magical and rarely implemented things like diffserv and intserv.
>
>
>
> On Monday, May 18, 2015 8:30am, "Simon Barber" <simon at superduper.net> 
> said:
>
> I am likely out of date about Windows Update, but there's many other 
> programs that do background downloads or uploads that don't implement 
> LEDBAT or similar protection. The current AQM recommendation draft in 
> the IETF will make things worse, by not drawing attention to the fact 
> that implementing AQM without implementing a low priority traffic 
> class (such as DSCP 8 - CS1) will prevent solutions like LEDBAT from 
> working, or there being any alternative. Would appreciate support on 
> the AQM list in the importance of this.
>
> Simon
>
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> http://www.aqua-mail.com
>
> On May 18, 2015 4:42:43 AM "Eggert, Lars" <lars at netapp.com> wrote:
>
>     On 2015-5-18, at 07:06, Simon Barber <simon at superduper.net
>     <mailto:simon at superduper.net>> wrote:
>
>         Windows update will kill your Skype call.
>
>
>     Really? AFAIK Windows Update has been using a LEDBAT-like
>     scavenger-type congestion control algorithm for years now.
>     Lars
>
>
>
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