Hi,
I cannot find a conclusive answer on the web…
Can I power the RB M11G with a regular 802.3af/at switch(and have gigabit connectivity)?
On www.routerboard.com Information is Not clearly
Page says Passive POE 8-30
But
https://i.mt.lv/routerboard/files/M11G-170817105410.pdf
Says 802.3af/at with unshielded cable, But It Says 8-30v, there is somethink wrong!
Knowing MT and looking at all their other products, I’d say passive POE is correct, and 802.3at/af is incorrect.
There’s not one single MT device that runs on 802.3at/af
You are not up to Date @savage
Oh ok, I stand corrected - there’s one 
The most AC Outdoor devices are 802.3 capable
M11G is passive only. There is a mistake about the “shielded”, as you correctly observed, there is only 8-30V.