like a few other users here I was surprised how bad the CSS610-8G-2S+ is (at least for now). Yesterday I got mine and went straight to installing it, in order to start using the 10g uplink to my server.
After a few hours of troubleshooting why I couldn't get DHCP on any device connected thru it.
Some things that I have noted, I had some VLANs tagged in the link from the router, but when capturing with Wireshark, I could see traffic from other VLANs coming without any tagging, which leads me to believe that was an issue with the switch itself.
How could MikroTik release a product that is practically unusable?
I had to remove all tagged VLANs from the router's uplink, after that the downstream devices started to get DHCP working.
I have also tried to assign a static IP to one device but was no luck until no tagged frames were present on any link.
We all need a solution for the issues present on this switch.
From the last "RC" firmware (rc6), which is more a Beta than a release candidate, still accessing the management from any SFP+ port is a hit or miss.
Also MikroTik needs to be more transparent on this issue, and quickly give us all a definitive solution, including the SwOS for this device on the download page.