router bgp foo
 no synchronization
 bgp log-neighbor-changes
 network x.x.x.x
 neighbor a.a.a.a outside router remote-as level3-as
 neighbor a.a.a.a  soft-reconfiguration inbound
 neighbor a.a.a.a  prefix-list advertise-out out
 neighbor a.a.a.a  weight 200
 neighbor remote-as foo
 neighbor b.b.b.b default-originate
 neighbor b.b.b.b soft-reconfiguration inbound
 neighbor b.b.b.b prefix-list advertise-in out
 neighbor b.b.b.b prefix-list advertise-in in
ip  prefix-list advertise-out seq 1 permit x.x.x.x/24
ip  prefix-list advertise-in seq 1 permit 0.0.0.0/0


 aggregate-address x.x.x.x/24 summary-only 
no auto-summary