Hi Toke,
> On Jun 1, 2016, at 13:20 , Toke Høiland-Jørgensen <[email protected]> wrote:
>
> moeller0 <[email protected]> writes:
>
>> So, my take on this is that we want to be able to re-map DSCP to zero. On
>> ingress if we do not trust our upstream to do the right thing on egress if
>> we do
>> not want to leak internal information to our upstream. As far as I can tell
>> DSCP
>> is supposed to be domain specific and I consider a home net equivalent with a
>> domain. This is why I tried to argue for the existing squash/wash
>> combination.
>> Since Dave had already implemented the squashing on ingress per iptables in
>> SQM,
>> we will still be able to offer this functionality in SQM independent on
>> whether
>> cake offers this natively or not (but note the sqm implementation re-mapped
>> after using the DSCP marks)*. I tried to divine which mis-feature Jonathan
>> referred to and remembered his unhappiness with that feature, and since I
>> really
>> want to see cake go somewhere I am fine with “sacrificing” this feature to
>> make
>> upstreaming more likely.
>
> I'm guessing this was probably discussed before and I've simply
> forgotten; but why does this (rewriting dscp bits) need to be part of
> the qdisc when you can do it with iptables?
Well, cake looks at the DSCP bits already, if it can do the re-mapping
we potentially would not need to touch iptables at all, which cakes goal being
simplicity seemed on-focus. But since this feature turned out to be
contentious, I vote for throwing it out and just rely on iptables… I believe
Jonathan argued that the re-mapping really is an orthogonal issue that does not
conceptually belong into a qdisc, a valid points as by now everyone agrees…
Best Regards
Sebastian
>
> -Toke
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