R7#

interface FastEthernet0/1
 ip address 180.40.7.1 255.255.255.224
 duplex auto
 speed auto
 ipv6 nat
!
interface Serial1/0
 no ip address
 encapsulation frame-relay
!
interface Serial1/0.1 point-to-point
 ipv6 address 2005:0:237::/64 eui-64
 ipv6 nat
 ipv6 ospf 1 area 0
 frame-relay interface-dlci 703
!
!
router rip
 version 2
 redistribute static
 network 180.40.0.0
 no auto-summary
!

ip route 33.33.33.0 255.255.255.0 Null0

ipv6 router ospf 1
 router-id 7.7.7.7
 log-adjacency-changes
 redistribute connected
!
ipv6 router rip RipR7
!
ipv6 nat v4v6 source list 1 pool ProbF
ipv6 nat v6v4 source 2005:0:237:0:212:7FFF:FE7D:3A00 33.33.33.33
ipv6 nat prefix 2006:6:6::/96