Hello,
I have created one bridge port in Mikrotik and add five ethernet port with bridge port. with bridge port more than 250 customers are connected . once customer remove from mikrotik (bridge port ) their MAC & IP not deleting from ARP table automatically.
Please assist anyone.
What routerboard are you using? Are the customers connected to the router in any particular way (dhcp, pppoe, etc..)?
The entries in the arp table are dynamic?
Than Go with manually
Thanks . 
V6.2 on CCR1036-12G-4S .
customers are connecting statically. all the ARP table are dynamic.
It depends on the timeout of a dynamic arp entry then. I don’t know the timeout of arp in mikrotik (but I guess it shouldn’t be long). Do you see them after a long time they have been disconnected?