S5#sh run | b bgp
router bgp 200
 bgp router-id 5.5.5.5
 bgp log-neighbor-changes
 neighbor 208.28.1.66 remote-as 300
 neighbor 208.28.1.129 remote-as 100
 !
 address-family ipv4
 neighbor 208.28.1.66 activate
 neighbor 208.28.1.129 activate
 no auto-summary
 no synchronization
 bgp inject-map NewRoutes exist-map Trigger
 network 50.0.0.0
 network 208.28.1.128 mask 255.255.255.224
 exit-address-family
!
!
!
ip prefix-list NewRoutes seq 5 permit 17.57.104.0/24
ip prefix-list NewRoutes seq 10 permit 17.57.105.0/24
ip prefix-list NewRoutes seq 15 permit 17.57.106.0/24
!
ip prefix-list Trigger seq 5 permit 17.57.0.0/16
access-list 1 permit 208.28.1.66
route-map Trigger permit 10
 match ip address prefix-list Trigger
 match ip route-source 1
!
route-map NewRoutes permit 10
 set ip address prefix-list NewRoutes
!