Ever since updating to swos 2.18 my switch loses connection with all devices after 20m to and hour. Nothing has changed and theres no loops. Do anyone has old firmware for this device 2.17 prefered
Well, I think you should open a ticket with support, It Is not normal, otherwise there would have been tens of post about the issue.
There Is an unofficial mirror here:
https://www.mikrotik-software.de/download.mikrotik.com/swos2/css309/
Thx, going back to 2.17 did the trick, not sure what in the update caused the issue but its fixed now