To convert the initial scenario into one with route server, first we must modify the configuration of routers RA, RB and RC. Now they must not peer between them, but only with the route server. For example, RA’s configuration would turn into:
# Configuration for router 'RA' ! hostname RA password **** ! router bgp 65001 no bgp default ipv4-unicast neighbor 2001:0DB8::FFFF remote-as 65000 ! address-family ipv6 network 2001:0DB8:AAAA:1::/64 network 2001:0DB8:AAAA:2::/64 network 2001:0DB8:0000:1::/64 network 2001:0DB8:0000:2::/64 neighbor 2001:0DB8::FFFF activate neighbor 2001:0DB8::FFFF soft-reconfiguration inbound exit-address-family ! line vty !
Which is logically much simpler than its initial configuration, as it now maintains only one BGP peering and all the filters (route-maps) have disappeared.