router bgp ASn-ISP
    neighbor 89.40.130.y remote-as 
    neighbor 89.40.130.y description TomIX
    neighbor 89.40.130.y next-hop-self
    neighbor 89.40.130.y soft-reconfiguration inbound
    neighbor 89.40.130.y prefix-list ISP out
!    
ip prefix-list ISP seq 10 permit clasa_IP-uri-1
ip prefix-list ISP seq 20 permit clasa_IP-uri-2
...
ip prefix-list ISP seq 80 permit clasa_IP-uri-8
ip prefix-list rnt-subnet seq 90 deny any