-----R1----------R2----------R3----
                                                               RIP        EIGRP        

R1#show running-config
hostname R1
!
interface FastEthernet0/0
 ip address 10.0.0.1 255.0.0.0
 duplex half
!
interface Serial1/1
 ip address 20.0.0.1 255.0.0.0
 serial restart-delay 0
!
router rip
 network 10.0.0.0
 network 20.0.0.0  

 

R2#show running-config
 hostname R2  
!
interface Serial1/0
 ip address 20.0.0.2 255.0.0.0
 serial restart-delay 0
!
interface Serial1/1
 ip address 30.0.0.1 255.0.0.0
 serial restart-delay 0
!

!
router eigrp 90
 redistribute rip metric 100 100 100 100 100
 network 30.0.0.0
 auto-summary
!
router rip
 redistribute eigrp 90 metric 5
 network 20.0.0.0

 

R3#show running-config
!
hostname R3
!
interface FastEthernet0/0
 ip address 40.0.0.1 255.0.0.0
 duplex half
!
interface Serial1/0
 ip address 30.0.0.2 255.0.0.0
 serial restart-delay 0
!
router eigrp 90
 network 30.0.0.0
 network 40.0.0.0
 auto-summary