[LARTC] Still a question about qdiscs

Linux Advanced Routing and Traffic Control

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Hello,

There is one thing that stays in the deep of my brain (where i can't access)
:
which qdisc exactly send the paquets: the root or the leafs ?

I explain:

You must have a root qdisc
then you have classes (don't care about how much)
and leaf classes MUST have qdisc to send the bits

in the howto 9.5.2.1 it's writen:
"Packets get enqueued and dequeued at the root qdisc, which is the only
thing the kernel talks to."

In the FAQ of docum.org article "root qdisc - class - qdisc - filter", Stef
Coene writes :
"Each leaf class has exactly 1 qdisc attached to it that actual sends the
packets."

These are only 2 sources and everybody say the same thing. So which qdisc
sends the trafic, the root or the leaf ? Or maybe the leaf sends the trafic
to the root which sends it to the NIC ?

Thank you in advance for answering
Nice week end anyway
Manu




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