R1#sh run | b router
router eigrp 100
 network 180.40.7.66 0.0.0.0
 network 208.28.1.66 0.0.0.0
 neighbor 180.40.7.65 Serial0/0.2
 auto-summary
!


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
!
interface Serial1/0.2 multipoint
 ip address 180.40.7.65 255.255.255.224
 frame-relay map ip 180.40.7.66 201
!
router eigrp 100
 network 180.40.7.65 0.0.0.0
 network 208.28.1.129 0.0.0.0
 neighbor 180.40.7.66 Serial1/0.2
 auto-summary
!

S5#sh run | b router
router eigrp 100
 network 208.28.1.65 0.0.0.0
 network 208.28.1.130 0.0.0.0
 auto-summary
!