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OSPF cannot communicate inter-area

Last updated on December 22, 2018

        I'm new to the networking world, and I'm trying to make a simple example yet I can't seem to get it to work.
What I'm trying is just to make 2 routers situated in different areas to communicate (ping) using another router in the middle (as an ABR). enter image description here Here is my configuration: router 0
interface Serial2/0
 ip address 20.1.1.2 255.255.255.252

router ospf 1
 network 20.1.1.0 0.0.0.3 area 1
router 1
interface Serial2/0
 ip address 20.1.1.1 255.255.255.252


interface Serial3/0
 ip address 20.1.2.1 255.255.255.252


router ospf 1
 network 20.1.1.0 0.0.0.3 area 1
 network 20.1.2.0 0.0.0.3 area 2
router 2
interface Serial3/0
 ip address 20.1.2.2 255.255.255.252

router ospf 1
 network 20.1.2.0 0.0.0.3 area 2
What am I doing wrong here?

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