RIPng Section

R3 Config

ipv6 unicast-routing
!
interface FastEthernet0/1
 ipv6 address 2001:35::3/64
 ipv6 rip 35 enable
!
ipv6 router rip 35

R5 Config

ipv6 unicast-routing
!
interface Loopback0
 ipv6 address 2001:5::5/128
 ipv6 rip 35 enable
!
interface FastEthernet0/0
 ipv6 address 2001:35::5/64
 ipv6 rip 35 enable
!
ipv6 router rip 35

Verification

R3#show ipv6 route rip

R   2001:5::5/128 [120/2]
     via FE80::C600:4FF:FE80:0, FastEthernet0/1