R2#sh run int s 1/2
Building configuration...

Current configuration : 119 bytes
!
interface Serial1/2
 no ip address
 ipv6 address 2005:0:1203::/64 eui-64
 ipv6 ospf 1 area 20
 clock rate 64000
end

R2#sh run | b router
ipv6 router ospf 1
 router-id 2.2.2.2
 log-adjacency-changes
 area 20 virtual-link 3.3.3.3
 redistribute connected
 redistribute rip R2Rip tag 2
!

R3#sh run int s 1/2
Building configuration...

Current configuration : 101 bytes
!
interface Serial1/2
 no ip address
 ipv6 address 2005:0:1203::/64 eui-64
 ipv6 ospf 1 area 20
end

R3#sh run | b router
ipv6 router ospf 1
 router-id 3.3.3.3
 log-adjacency-changes
 area 20 virtual-link 2.2.2.2
!