Understand port isolation

RouterOS Beginner Basics
1

I have a MikroTik CRS125 with RouterOS v6.40.2 (stable) in BRIDGE mode.

This is port isolation dinamic cofiguration generated with default settings:

(https://ibb.co/jPN9jF)

(https://ibb.co/ebNWya)

So:

  • for etherX and sfp1 ports: Isolation Profile field value (29) in Ports tab, match Port Profile field value (29) in Port Isolation tab.
  • for switch1-cpu port: Isolation Profile field value (31) in Ports tab doesn’t match Port Profile field value (30) in Port Isolation tab.

Does anyone tell me why?

TIA

2

Can anyone help me to understand this?