In its most simplistic form .... switch(config) ip routing switch(config) router ospf (process-ID) switch(config-router)#log-adjacency-changes I am not going to go into anymore detail because OSPF can be configured many different ways depending on the requirements. But in addition to the two commands above, you will need to specify networks and area's such as network 1..1.1.0 0.0.0.3 area 0 Also you might want to look into creating loopack intefaces and making then the router ID for OSPF, since loopback intefaces never go down int lo0 ip address 1.1.1.1 255.255.255.252 router ospf 1 router-id 1.1.1.1

In its most simplistic form .... switch(config) ip routing switch(config) router ospf (process-ID) switch(config-router)#log-adjacency-changes I am not going to go into anymore detail because OSPF can be configured many different ways depending on the requirements. But in addition to the two commands above, you will need to specify networks and area's such as network 1..1.1.0 0.0.0.3 area 0 Also you might want to look into creating loopack intefaces and making then the router ID for OSPF, since loopback intefaces never go down int lo0 ip address 1.1.1.1 255.255.255.252 router ospf 1 router-id 1.1.1.1