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CRS312 to UniFi USW-Pro-48 could only link at 1G after a RouterOS upgrade; the RouterBOARD firmware had not been updated
A MikroTik CRS312-4C+8XG (RouterOS 7.13.4) and a Ubiquiti USW-Pro-48 (6.6.61) over 20 m OM3 with SR 850 nm SFP+ optics would only negotiate 1G full duplex; 10G attempts failed with no link and occasional Rx Fault on the UniFi side. Several fibre and transceiver combinations were tested and RouterOS…
