R1

show bgp neighbor

configure
set protocols bgp group external-peer neighbor 12.12.12.2 description Peer_With_Router2_AS_1
commit and-quit

show bgp neighbor 


R2

show bgp neighbor 

configure
set protocols bgp group external-peer neighbor 12.12.12.1 description Peer_With__Router1_AS_2
set protocols bgp group internal-peer neighbor 4.4.4.4 description Peer_With_Route_Reflector_Router4
commit and-quit

show bgp neighbor