quote of the day; arden packeer...

them's the rules... mixing ospf network types...

• An adjacency will be formed with routers running OSPF, as long as the authentication is the same, the stub flag is the same, the area is the same, and the timers are the same.
• If we mix and match network types we might need to modify the timers so we can form an adjacency. This is done with the ip ospf hello-interval and ip ospf dead-interval commands.
• You can mix and match network types as long as the network types involved have the same DR relationship. You can’t mix network types that require a DR with those that don’t require a DR.