RA
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sysname RA
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interface GigabitEthernet0/0/0
ip address 10.1.1.1 255.255.255.0
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RB
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sysname RB
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interface GigabitEthernet0/0/0
ip address 10.1.1.2 255.255.255.0
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interface GigabitEthernet0/0/1
ip address 10.1.2.1 255.255.255.0
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RC
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sysname RC
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interface GigabitEthernet0/0/0
ip address 10.1.2.2 255.255.255.0
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interface GigabitEthernet0/0/1
ip address 10.1.3.1 255.255.255.0
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RD
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sysname RD
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interface GigabitEthernet0/0/0
ip address 10.1.3.2 255.255.255.0
RA
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router id 1.1.1.1
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interface LoopBack0
ip address 1.1.1.1 255.255.255.255
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ospf 1
area 0.0.0.1
network 1.1.1.1 0.0.0.0
network 10.1.1.1 0.0.0.0
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RB
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router id 2.2.2.2
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interface LoopBack0
ip address 2.2.2.2 255.255.255.255
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ospf 1
area 0.0.0.0
network 2.2.2.2 0.0.0.0
network 10.1.2.1 0.0.0.0
area 0.0.0.1
network 10.1.1.2 0.0.0.0
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RC
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router id 3.3.3.3
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interface LoopBack0
ip address 3.3.3.3 255.255.255.255
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ospf 1
area 0.0.0.0
network 3.3.3.3 0.0.0.0
network 10.1.2.2 0.0.0.0
area 0.0.0.2
network 10.1.3.1 0.0.0.0
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RD
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router id 4.4.4.4
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interface LoopBack0
ip address 4.4.4.4 255.255.255.255
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ospf 1
area 0.0.0.2
network 4.4.4.4 0.0.0.0
network 10.1.3.2 0.0.0.0
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