*
R1#sh run | b interface Ethernet0/1
interface Ethernet0/1
 no ip address
 half-duplex
 ipv6 address 2005:0:104::/64 eui-64
 ipv6 rip R1Rip enable
!
interface Serial0/1
 no ip address
 ipv6 address 2005:0:102::/64 eui-64
 ipv6 rip R1Rip enable
 clock rate 64000
!
router rip
 version 2
 network 180.40.0.0
 no auto-summary
!
no ip http server
ip classless
!
!
ipv6 router rip R1Rip


R2#sh run | b interface Serial1/1
interface Serial1/1
 no ip address
 ipv6 address 2005:0:102::/64 eui-64
 ipv6 rip R2Rip enable
!
!
ipv6 router rip R2Rip

R4#sh run | b int
interface Loopback0
 no ip address
 ipv6 address 2000:4:4::/64 eui-64
 ipv6 rip R4Rip enable
!
interface FastEthernet0/0
 no ip address
 duplex auto
 speed auto
 ipv6 address 2005:0:104::/64 eui-64
 ipv6 rip R4Rip enable
!

!
ipv6 router rip R4Rip