By pure luck, I ended up chatting with one of the NetworkManager chaps, who invited a merge request with the proper parameters for CAKE.

He wrote

Currently NM doesn't support configuring CAKE parameters. IOW, if you
set "root cake bandwidth 100Mbit", you will see in the tc output that
cake was set but with default parameters.

Yes, I think it will be useful to have CAKE support in NM, but I can't
say when it will be implemented. Of course, patches are always
welcome; if anybody is interested in contributing it, please have a
look at the work that was done to support SFQ:

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/commit/b22b4f9101b1cbfde49b65d9e2107e4ae0d817c0

Sounds like a good job for next weekend, can I get some reviewers for the week after?

--dave


-------- Forwarded Message --------
Subject: Re: New "tc qdisc" options
Date: Mon, 5 Oct 2020 17:56:44 +0200
From: Beniamino Galvani <bgalvani@redhat.com>
To: Dave Collier-Brown <dave.collier-brown@indexexchange.com>
CC: Thomas Haller <thaller@redhat.com>, davecb@spamcop.net <davecb@spamcop.net>, NetworkManager-list@gnome.org


On Mon, Oct 05, 2020 at 11:52:32AM -0400, Dave Collier-Brown wrote:
I can absolutely propose a patch/MR based on that example, but I'm
fallible (;-))

Do you prefer an MR in github or a git-format-patch via email?

A MR on gitlab is the preferred way:

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests

Thanks,
Beniamino