-------EN R1 ---------
ipv6 unicast-routing
interface Loopback0
ipv6 address 2001:DB8:CAFE:1::1/128
ipv6 ospf 100 area 0
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
ipv6 address 2001:DB8:12:12::1/64
ipv6 ospf 100 area 0
ipv6 router ospf 100
router-id 1.1.1.1
passive-interface Loopback0
-------EN R2 ---------
ipv6 unicast-routing
interface Loopback0
ipv6 address 2001:DB8:CAFE:2::2/128
ipv6 ospf 100 area 0
!
interface FastEthernet0/0
ipv6 address 2001:DB8:12:12::2/64
ipv6 ospf 100 area 0
!
interface FastEthernet1/0
ipv6 address 2001:DB8:23:23::2/64
ipv6 ospf 100 area 1
ipv6 router ospf 100
router-id 2.2.2.2
log-adjacency-changes
passive-interface Loopback0
-------EN R3 ---------
ipv6 unicast-routing
interface Loopback0
ipv6 address 2001:DB8:CAFE:3::3/128
ipv6 ospf 100 area 1
!
interface FastEthernet0/0
ipv6 address 2001:DB8:23:23::3/64
ipv6 ospf 100 area 1
!
ipv6 router ospf 100
router-id 3.3.3.3
log-adjacency-changes
passive-interface Loopback0
