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Comparison Example

In the following example you configure a range of OSPF interfaces with the network area command.



host1(config)#interface fastEthernet 0/0 

host1(config-if)#ip address 1.1.1.1 255.255.255.0 

host1(config-if)#ip address 2.2.2.2 255.255.255.0
secondary 

host1(config-if)#exit 

host1(config)#router ospf 1 

host1(config-router)#network 1.1.1.0 0.0.0.255
area 0 

host1(config-router)#network 2.2.2.0 0.0.0.255
area 0

If you want to specify the cost, you can do so for both interfaces simultaneously.



host1(config)#interface fastEthernet 0/0 

host1(config-if)#ip ospf cost 30

You can use address commands to create a third OSPF interface over the Ethernet interface. When you specify a cost, you set it for only that interface.



host1(config)#interface fastEthernet 0/0 

host1(config-if)#ip address 3.3.3.3 255.255.255.0
secondary 

host1(config-if)#exit 

host1(config)#router ospf 1 

host1(config-router)#address 3.3.3.3 area
0 

host1(config-router)#address 3.3.3.3 cost
25

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