Debug IP OSPF Events
Displays all the OSPF event messages on the router.
Router#debug ip ospf events
The following example shows what happens when debug ip ospf events is turned on for R2.
R2(config-router)#do debug ip ospf events
Here are some of the messages outputted shortly after enabling OSPF event debugging.
To turn off debugging, the following command is issued.
R2(config-router)#do un all