R4

show ip bgp sum
show run | be router bgp

router bgp 1
 neighbor RRC peer-group
 neighbor RRC remote-as 1
 neighbor RRC description PEER WITH ROUTE REFLECTOR CLIENTS 
 neighbor RRC update-source Loopback0
 neighbor RRC route-reflector-client
 neighbor RRC soft-reconfiguration inbound

 no neighbor 2.2.2.2 remote-as 1
 no neighbor 3.3.3.3 remote-as 1
 no neighbor 5.5.5.5 remote-as 1
 no neighbor 6.6.6.6 remote-as 1

 neighbor 2.2.2.2 peer-group RRC
 neighbor 2.2.2.2 description PEER WITH ROUTE REFLECTOR CLIENTS - ROUTER 2

 neighbor 3.3.3.3 peer-group RRC
 neighbor 3.3.3.3 description PEER WITH ROUTE REFLECTOR CLIENTS - ROUTER 3

 neighbor 5.5.5.5 peer-group RRC
 neighbor 5.5.5.5 description PEER WITH ROUTE REFLECTOR CLIENTS - ROUTER 5

 neighbor 6.6.6.6 peer-group RRC
 neighbor 6.6.6.6 description PEER WITH ROUTE REFLECTOR CLIENTS - ROUTER 6
 

R2

show ip bgp sum

router bgp 1
 neighbor AS2 peer-group
 neighbor AS2 remote-as 2
 neighbor AS2 description PEER WITH AS 2 - ROUTER 1  
 neighbor AS2 soft-reconfiguration inbound

 no neighbor 12.12.12.1 remote-as 2
 
 neighbor 12.12.12.1 peer-group AS2
 neighbor 12.12.12.1 description AS 2 - ROUTER 1  
 

R2

show ip bgp sum