R1#sh run | b router
router eigrp 100
 network 17.57.100.1 0.0.0.0
 network 208.28.1.1 0.0.0.0
 neighbor 208.28.1.2 Serial0/0.1
 distribute-list prefix NotMine in Serial0/0.1
 no auto-summary
!
ip prefix-list NotMine seq 5 deny 17.57.0.0/16 le 32
ip prefix-list NotMine seq 10 permit 0.0.0.0/0 le 32
!


R2#sh run | b 1/0.1
interface Serial1/0.1 multipoint
 ip address 208.28.1.3 255.255.255.248
 frame-relay map ip 208.28.1.1 203
 frame-relay map ip 208.28.1.2 203
!
!
router eigrp 100
 network 2.2.2.2 0.0.0.0
 network 208.28.1.3 0.0.0.0
 neighbor 208.28.1.2 Serial1/0.1
 distribute-list prefix NotMine in Serial1/0.1
 no auto-summary
!
ip prefix-list NotMine seq 5 deny 2.2.2.0/24
ip prefix-list NotMine seq 10 permit 0.0.0.0/0 le 32
!


R3#sh run | b 1/0
interface Serial1/0
 ip address 208.28.1.2 255.255.255.248
 encapsulation frame-relay
 no ip split-horizon eigrp 100
 no fair-queue
 frame-relay map ip 208.28.1.1 301
 frame-relay map ip 208.28.1.3 302
!
router eigrp 100
 network 17.80.1.1 0.0.0.0
 network 208.28.1.2 0.0.0.0
 neighbor 208.28.1.3 Serial1/0
 neighbor 208.28.1.1 Serial1/0
 no auto-summary
!