R1#sh run int lo 0
Building configuration...

Current configuration : 71 bytes
!
interface Loopback0
 no ip address
 ipv6 address 2006:1:1::/128
end

R2#sh run | b Lo
interface Loopback0
 no ip address
 ipv6 address 2006:2:2::/128
!
ipv6 router ospf 1
 router-id 2.2.2.2
 log-adjacency-changes
 area 20 virtual-link 3.3.3.3
 redistribute connected route-map NoLoop
 redistribute rip 1
!
ipv6 router rip 1
 redistribute connected route-map NoLoop
 redistribute ospf 1 metric 5
!
!
!
ipv6 prefix-list NoLoop seq 5 deny 2006:2:2::/128
ipv6 prefix-list NoLoop seq 10 permit ::/0 le 128
route-map NoLoop permit 10
 match ipv6 address prefix-list NoLoop
!


R3#sh run int lo 1
Building configuration...

Current configuration : 71 bytes
!
interface Loopback1
 no ip address
 ipv6 address 2006:3:3::/128
end


R4#sh run int lo 1
Building configuration...

Current configuration : 71 bytes
!
interface Loopback1
 no ip address
 ipv6 address 2006:4:4::/128
end

R7#sh run int lo 0
Building configuration...

Current configuration : 71 bytes
!
interface Loopback0
 no ip address
 ipv6 address 2006:7:7::/128
end