Following Mikrotik hardware support wiki:
https://wiki.mikrotik.com/wiki/MikroTik ... ansceivers
I found that my “NetMetal ac²” should support 100Mbit/s fiber modules in its SFP cage.
I tried Planet MFB-FX and HP x111 100M modules with no success.
Other Routerboard models (tested on CRS106-1C-5S) from the same list supports 100M modules.
Any comments ?