We can use MikroTik feature “Loop-Protect”
Loop protect feature can prevent Layer2 loops by sending loop protect protocol packets and shutting down interfaces in case they receive loop protect packets
GOTO Terminal:: enabling LOOP Protection for Ethernet
## interface ethernet set loop-protect=on 2
* Three values “ON”, “OFF” and “Default” … default works as turned off
* * [2 is the number of Ethernet :: use command:: 'interface print' to see the number of interfaces]
** We can use it by VLAN interface also
## interface vlan set loop-protect=on 3
loop-protect-send-interval (time interval; Default: 5m)
Sets how often loop protect packets are sent on selected interface.
loop-protect-disable-time (time interval | 0; Default: 5m)
Sets how long selected interface is disabled when loop is detected. 0 - forever.