Hey Folks,
So using a CRS310-1G-5S-4S+ - fibre SFP+ and DACs connected to it are fine, however both the S-RJ01 and the S-RJ10 seem to show a weird issue. I've 8 Gbps internet and via the same switch, connecting via fibre, performance is as expected. Using those SFPs the upload is fine, the download is a lot lower than expected.
I cannot see anything interesting in RouterOS as this is being taken care of by the switch ASIC, RouterOS isn't even reporting the flow.
Any suggestions for obvious things I'm missing or is this a compatibility issue between the CRS310 and the Mikrotik SFPs?