[Cake] Ubiquity (Unifi ) Smart Queues

[Nils Andreas Svee]

You’re unlikely to do any real harm though, but the warning is there cause you can potentially soft brick your router using it. I’ve run into that myself if I remember correctly, where after a firmware upgrade the kernel had slightly changed, so loading the sch_cake module caused it to panic. And I had it start through /config/scripts/post-config.d of course, so it would happen on every restart.

Nothing a factory reset won’t solve, but annoying when if you’re messing about remotely :)

As for USG, I think I used to have some binaries for those too. I do still have some old kernel sources for them laying around in a repo.
It’s been awhile, but I probably stopped building for those as it wasn’t as straightforward to keep up with the versions of the firmware.

Though frankly, I don’t plan on updating the sch_cake and tc binaries when new firmwares are released anymore, as they don’t publish the GPL archives on their webpage after the redesign, and they don’t respond to requests for them either by the looks of the forums. So if it breaks there’s not much I can do anymore.

Best Regards,
Nils Andreas Svee

> On Jan 3, 2024, at 14:44, Pete Heist via Cake <cake at lists.bufferbloat.net> wrote:
> 
> On Tue, 2024-01-02 at 10:59 -0800, dave seddon via Cake wrote:
>> I thought people might be interested to see what Ubiquity/Unifi is
>> doing with "Smart Queues" on their devices.  The documentation on
>> their website is not very informative.
>> <snip>
>> "Smart Queue" Implementation
>> 
>> Looks like they only apply tc qdiscs to the Eth2, and sadly this is
>> NOT cake, but fq_codel.
>> 
>> And cake isn't available :(
>> 
>> root at USG-Pro-4:~# tc qdisc replace dev eth0 cake bandwidth 100m rtt
>> 20ms
>> Unknown qdisc "cake", hence option "bandwidth" is unparsable
> 
> Hi Dave, there's a community contributed version of Cake for EdgeRouter
> devices that I've been using for years on production ER-X's:
> 
> https://community.ui.com/questions/Cake-compiled-for-the-EdgeRouter-devices/fc1ff27c-f321-4344-8737-fcc755cae8a2
> 
> I don't think that works for UniFi/USG devices, however, and one should
> note the disclaimer and be careful when installing it. Also, it must be
> re-installed after every upgrade.
> 
> Cheers,
> Pete
> 
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