interface GigabitEthernet0/0/0
 ip address 13.1.1.3 255.255.255.0 
#
interface GigabitEthernet0/0/1
 ip address 192.168.10.254 255.255.255.0 

interface LoopBack0
 ip address 3.3.3.3 255.255.255.255 
#
ospf 1 router-id 3.3.3.3 
 area 0.0.0.0 
  network 13.1.1.0 0.0.0.255 
  network 192.168.10.0 0.0.0.255 

interface GigabitEthernet0/0/0
 ip address 192.168.20.1 255.255.255.0 
#
interface GigabitEthernet0/0/1
 ip address 12.1.1.2 255.255.255.0 

interface LoopBack0
 ip address 2.2.2.2 255.255.255.255 
#
ospf 2 router-id 2.2.2.2 
 area 0.0.0.0 
  network 12.1.1.0 0.0.0.255 
  network 192.168.20.0 0.0.0.255 
#

interface GigabitEthernet0/0/0
 ip address 13.1.1.1 255.255.255.0 
#
interface GigabitEthernet0/0/1
 ip address 12.1.1.1 255.255.255.0 

interface LoopBack0
 ip address 1.1.1.1 255.255.255.255 
#

ospf 1 router-id 1.1.1.1
import-route ospf 2
area 0.0.0.0
network 13.1.1.0 0.0.0.255
#
ospf 2 router-id 1.1.1.1
import-route ospf 1
area 0.0.0.0
network 12.1.1.0 0.0.0.255