HCIP_ OSPF irregular area

Configuration address ：
Qi ospf：
R1：
    ospf 1 router-id 1.1.1.1
    area 0
    network 12.1.1.0 0.0.0.255
    network 1.1.1.1 0.0.0.0
    ( Other similar )
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Through a tunnel R2----R4（ Interfaces must be in the same area 1 Inside ）
[r2]interface Tunnel 0/0/0
[r2-Tunnel0/0/0]ip address 10.1.1.1 24
[r2-Tunnel0/0/0]tunnel-protocol gre
[r2-Tunnel0/0/0]source 23.1.1.2    
[r2-Tunnel0/0/0]destination 34.1.1.4（ Pay attention to the words It could be wrong ）
（R4 Empathy ）

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stay R2 And R4 Of area 0 Declaration in the area tunnel Tunnel ：10.1.1.0 0.0.0.255