I have configure OSPF dinamically on my network and I have two way for in/out to Internet with the Same ISP my problem that I have configure on R2 a public IP address range but all the time this public range go out from R2 to internet across R1 or R3.

I need to configure that all the time this public range go out to Internet only that for R3.- Normally I can do this on Cisco using route map, but i dont know how I can do this on Mikrotik.

I read it on Internet that exist the posibility with /routing filter - and multiple others option but I dont know, please can you give me your comments please and possible Mikrotik commands

thank you

Can't you increase the cost of an interface