Hello,

I'm not sure if this is the right place to ask this, but i'm stuck on a trafic 
priority problem since some time.

I have 2 10Gb interfaces (bnx2x) bonded in a 802.3ad aggregate. On this 
aggregate, 2 vlans are configured (let's INT and EXT) I need to ensure that, 
when sending traffic at near line rate via EXT, all packets targeted to INT are 
sent in priority (dropping EXT traffic as needed).

My devices have the mq qdisc by default (running CentOS 7, kernel 3.10).

After googling for documentation about the mq qdisc, I saw it was a stub to 
have one root qdisc per tx queue, so I expected that below were standard 
pfifo_fast qdiscs and that I should be able to just mark traffic as 
Minimize-Delay via iptable's TOS target, but it seems that it has no visible 
effect when mq+pfifo_fast are in effect.

I played with various qdiscs, and I think I got the right behavior when 
replacing the mq root qdisc by a prio qdisc (along with using TOS target), but 
then I was loosing the per-queue lock aspect of the mq qdisc. I did not manage 
to reproduce this with mq yet.

Could you recommend a way of achieving my goal with the maximum performance ?

Should more details be needed about my setup, i'll collect and send them.

Thanks for your help,

Best regards,
-- 
Aurélien--
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