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OSPF Multiarea Configuration
Area 1
Fa1/0
10.1.4.1
10.1.2.1
S0/0
Figure 14-2: Network Setup for OSPF Multiarea
- OSPF hierarchical and multiarea design adds complexity to the router configuration. However,
OSPF multiarea configuration is simple once understood OSPF single-area configuration. The
difficult part would be network design (deciding which subnets should be placed in which areas).
After the area design is complete, the configuration would be straightforward and easy.
- OSPF Multiarea configuration on RT1:
RT1#router ospf 1
RT1(config-router)#network 10.1.1.1 0.0.0.0 area 0
RT1(config-router)#network 10.1.2.1 0.0.0.0 area 1
RT1(config-router)#network 10.1.3.1 0.0.0.0 area 0
RT1(config-router)#^Z
RT1#
- OSPF Multiarea configuration on RT2:
RT2#router ospf 1
RT2(config-router)#network 10.0.0.0 0.255.255.255 area 1
RT2(config-router)#^Z
RT2#
- OSPF Multiarea configuration on RT3:
Area 0
10.1.1.1
Fa1/0
RT3#router ospf 1
RT3(config-router)#network 10.1.3.2 0.0.0.0 area 0
RT3(config-router)#network 10.1.5.2 0.0.0.0 area 1
RT3(config-router)#network 10.1.6.1 0.0.0.0 area 0
RT3(config-router)#^Z
RT3#
104
RT1
10.1.3.1
S0/1
S0/0
S0/0
10.1.2.2
10.1.3.2
RT2
S0/1
10.1.5.1
10.1.5.2
S0/1
RT3
Fa1/0
10.1.6.1
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