SFP not staying connected. Drops off every two seconds, connects again, drops off again after two seconds, rinse -repeat.
Running latest beta, after trying latest stable version 6.34.7
Tried auto, on/off negotiation, flow control off/on, hard set speed to 1 gbit

I have tried TP-Link SFP (Multimode cable 3ft and 850 SFP's both ends) and Mikrotik 1310 (Single SFP both ends and Single Mode cable 3ft)

There's nothing wrong with the SFP's or cables. I have used ether of them (SFP's and cables) in a UBNT Edgerouter, without issue.

What make model SFP is needed to make this work?

I had to go back to using the EdgeRouter, but want to convert over.

Have you disabled auto negotiation on both ends of the link?

https://wiki.mikrotik.com/wiki/MikroTik ... ansceivers