how can l block mac spoofing on the mikrotik bridge

RouterOS General
1

Dear All
need help on how to prevent mac spoofing on a mikrotik bridge so that client will not be able to steal the hotspot seccion of each other and prevent inter interface communication in a bridge.
thanks

2

see if this helps:

http://forum.mikrotik.com/t/32-subnet-mask-to-prevent-arp-spoofing/26921/1