r1
~~~~~~~
conf t
hostname r1
router ospf 1
network 192.168.1.0 0.0.0.255 area 1
int fa0/0
ip address 192.168.1.2 255.255.255.0
no sh

ABR
~~~~~~~~~~~~
conf t
hostname ABR


int fa0/0
des connection to r1
ip address 192.168.1.1 255.255.255.0
no sh

int fa0/1
des connection to r2
ip address 10.10.1.1 255.255.255.0
no sh

router ospf 999
network 10.10.1.0 0.0.0.255 area 2
network 192.168.1.0 0.0.0.255 area 1


r2
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
conf t
hostname r2

int fa0/0
ip address 10.10.1.2 255.255.255.0
no sh

router ospf 2
network 10.10.1.0 0.0.0.255 area 2