[Cake] draft-ietf-tsvwg-nqb-15.txt vs the cake AQM

[Dave Taht <dave.taht@gmail.com>]

I have been sitting on the cake related patches for this for years
now, and it is my hope to get support for NQB into the next linux
release, regardless of whether it gets through last call at this time,
unless the selected codepoint number changes. (?)

Cake (please see the man page here:
https://man7.org/linux/man-pages/man8/tc-cake.8.html ) supports
multiple diffserv models.

besteffort is exactly that, besteffort, and will not gain NQB support.

The diffserv3 interpretation is the default, and given that flow
queuing handles most of the NQB-like problems naturally, and  Voice
(CS7, CS6, EF, VA, TOS4) is all that is handled there today, I am
thinking of *not* elevating NQB into that class is the right thing.

NQB fits nicely into the diffserv4 model in the video class, so I will
put it there. since covid we tend to use the diffserv4 model a lot to
manage videoconferencing better.

As for the CS0-CS7 precedence model inc cake, we have declared that
obsolete in the code, and wherever NQB falls into it, great. And the
diffserv8, I don´t know.

Anyway, does that work for everyone?

Part II of this would be a discussion of the various wash modes, but
merely getting the right byte into the right lookup tables after all
this discussion, would be nice.