Lab 20 – OSPF Configuration
- Enable a loopback interface on all routers.
- (config)#int loopback0
- (config-if)#ip address [ip address] 255.255.255.255
- Enable single area OSPF, exclude interfaces on edge router
- (config)#route ospf 100
- (config-router)#passive-interface [interface] – For segments that should not get ospf advertisement.
- (config-router)#network 10.0.0.0 0.255.255.255 area 1
- (config-router)#network 192.168.0.0 0.0.0.255 area 1
- I forgot to add the loopback route
- Show OSPF id
- (config)#show ip protocols
- Show router adjacencies
- (config)#show ip ospf neighbors
- Show all loopbacks are in the routing table
- (config)#show ip route
- Set reference bandwidth so that a 100 Gbps interface will have a cost of 1
- (config-router)#auto-cost reference-bandwidth 100000
- Had to look up in my notes for command
- (config-router)#auto-cost reference-bandwidth 100000
- Verify the cost of the fastEthernet links
- (config)#show ip ospf interface [interface]
- Another lookup.
- (config)#show ip ospf interface [interface]
- Edit the cost on the interfaces
- (config-if)#ip ospf cost [cost]