Re: Traffic shaping at 10~300mbps at a 10Gbps link

["Ethy H. Brito" <ethy.brito@inexo.com.br>]

On Wed, 9 Jun 2021 21:11:03 +0200
Adam Niescierowicz <adam.niescierowicz@justnet.pl> wrote:

> How you make filters, it's one level or multilevel based?

Multi level.

First test IPv4, IPv6 or Other Protocols.
Then test for two cidr "/19" and one /20 blocks we use.
Then for every /24 block inside the selected cidr block.

I can send some fragments of each "test" block, if you want.

Cheers

Ethy


> 
> W dniu 09.06.2021 o 17:04, Ethy H. Brito pisze:
> > Hi Guys!
> >
> > Doesn't anybody can help me with this?
> > Any help will be appreciated.
> >
> > Cheers
> >
> > Ethy
> >
> >
> > On Mon, 7 Jun 2021 13:38:53 -0300
> > "Ethy H. Brito" <ethy.brito@inexo.com.br> wrote:
> >  
> >> Hi
> >>
> >> I am having a hard time trying to shape 3000 users at ceil speeds from 10 to 300mbps in a 7/7Gbps link using
> >> HTB+SFQ+TC(filter by IP hashkey mask) for a few days now tweaking HTB and SFQ parameters with no luck so far.
> >>
> >> Everything seems right, up 4Gbps overall download speed with shaping on.
> >> I have no significant packets delay, no dropped packets and no high CPU average loads (not more than 20% - htop info)
> >>
> >> But when the speed comes to about 4.5Gbps download (upload is about 500mbps), chaos kicks in.
> >> CPU load goes sky high (all 24x2.4Ghz physical cores above 90% - 48x2.4Ghz if count that virtualization is on) and as a
> >> consequence packets are dropped (as reported by tc -s class sh ...), RTT goes above 200ms and a lots of ungry users. This
> >> goes from about 7PM to 11 PM every day.
> >>
> >> If I turn shaping off, everything return to normality immediately and peaks of not more than 5Gbps (1 second average) are
> >> observed and a CPU load of about 5%. So I infer the uplink is not crowded.
> >>
> >> I use one root HTB qdisc and one root (1:) HTB class.
> >> Then about 20~30 same level (1:xx) inner classes to (sort of) separate the users by region
> >> And under these inner classes, goes the almost 3000 leaves (1:xxxx).
> >> I have one class with about 900 users and this quantity decreases by the other inner classes having some of them with just
> >> one user.
> >>
> >> Is the way I'm using HTB+SFQ+TC suitable for this job?
> >>
> >> Since the script that creates the shaping environment is too long I do not post it here.
> >>
> >> What can I inform you guys to help me solve this?
> >> Fragments of code, stats, some measurements? What?
> >>
> >> Thanks.
> >>
> >> Regards
> >>
> >> Ethy  
> >  
> -- 
> ---
> Pozdrawiam
> Adam Nieścierowicz
> 


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