Multiarea OSPF

OSPFv2

Configure OSPF on an ABR(commands don’t refer to the figure):

R(config)#router ospf 10
R(config-router)#router-id 10.0.0.1
R(config-router)#network 10.1.1.0 0.0.0.255 area 1
R(config-router)#network 10.1.2.0 0.0.0.255 area 1
R(config-router)#network 192.168.1.0 0.0.0.255 area 0
R(config-router)#passive-interface fa0/0

Configure route summarization on ABR:

R(config)#router ospf 10
R(config-rtr)#area 1 range 10.1.0.0 255.255.252.0

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