[Codel] Codel configuration

[Rodrigo Alvarez Dominguez]

Hi Jonathan
Thanks for your quick answer. REally appreciate it!!!
I wil try later the cake statement (is it the same as codel)?. I am
starting with Codel. So I need to have a better understanding of codel.
I have the following scenario
[image: image.png]
Where client asks for a FTP file to server. Link between router-server has
a 150MBit speed with a delay of 250 ms.
Then link between client and router has 10 Mbit and the Codel algorithm. So
I am checking the differences between having codel or not.
*Do you have an advice to have a good scenario for testing Codel properly?
Or a document to know how the differences parameter can affect to the
communication?*
In my scenario it seems it is better not having Codel.  See attached
ClientFTPCodelNO-NO-NO (nocodel) versus ClientFtpCodel1000..
where a Codel Algorithm of 1000 packets, 13 ms target and 100 interval is
configured
Regards.



El lun., 14 ene. 2019 a las 16:24, Jonathan Morton (<chromatix99 at gmail.com>)
escribió:

> > On 14 Jan, 2019, at 12:54 pm, Rodrigo Alvarez Dominguez <
> rodroleon at gmail.com> wrote:
> >
> > I would like to know if it is possible to have the following
> configuration where there is a rate limit and codel algorithm configured
> over the same interface
> >
> > tc qdisc add dev r1-eth0 root handle 1: htb
> > tc class add dev r1-eth0 parent 1: classid 1:1 htb rate 10000kbit burst
> 15kbit
> > tc qdisc add dev r1-eth0 parent 1:1 handle 10: fq_codel limit 1000
> target 5000 interval 10000 noecn
> > tc filter add dev r1-eth0 protocol ip prio 1 u32 match ip dst 0.0.0.0/0
> flowid 1:1
>
> Yes, this is an extensively tested configuration.  Have you tried it?
>
> You could also just use Cake, which does all the above, better, with only
> one tc invocation:
>
>         tc qdisc replace dev r1-eth0 root handle 1: cake bandwidth
> 10000kbit besteffort flows
>
>  - Jonathan Morton
>
>
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