Obligatory OpenWRT post for reference ;)

First the disclaimer, very much work in progress (WIP)! Don't YET expect everything to work! 10/100Mbit is not working, SFP+ is experimental and the code base is a bit of a mess (but far better then the SDK).

Anyway, https://forum.openwrt.org/t/support-for-rtl838x-based-manage... is the forum thread talking about these switches, https://svanheule.net/switches/ is the wiki.

Lots of help is still needed, even if it is just doing teardowns with photo's and help in learning stuff. Full GPL source is available though.