Thank you for your answer Ali,I've checked it, but it doesn't answer to my following questions:
I've noticed something else that confuses me -
traceroute from ip belloging to Prefix1, bellonging to ASN1 does not go trough the provider1 of ASN1 but it goes trough provider2 that belong of ASN2
in /ip route print
in front of dst address that should go via provider 1 is only Db
and in front of dst address that should go via provider 2 is ADb
seems like the route is not active ?
upload of prefix1/ASN1 goes via provider 2 and download of prefix1/ASN1 comes via provider 1
How can I make traffic (download/upload) from prefix1 of ASN1 goes only via provider 1 and traffic (download/upload) from prefix 2 3 and 4 goes only via provider2 of ASN2 ?
Thanks to all that will share ideas.