Hello everyone.
If forwarding of port 2 (for example) to port 5 is prohibited, then it is prohibited, but if we enable mirroring of incoming and outgoing traffic from port 2 to port 5, then the connection between ports 2 and 5 starts working.
See screenshots:
At the same time, if you make a mirror of another port, not number 2, then the connection with number 2 does not appear.
Screenshots:
Traffic mirroring and forwarding are different actions. Mirroring is intended for monitoring and debugging purposes and should not affect port isolation.
version 2.16 for new RB260GS(CSS106-5G-1S), new RB260GSP(CSS106-1G-4P-1S) - is last published version on https://mikrotik.com/download