One of the main benefits of using OSPF (Open Shortest Path First) is that all of your routers will have a similar view of the network. However, there will be situations where you may not want all of your routers to have a full routing table. While the configuration of stub areas and total stub areas is beyond the scope of the CCNA and CCENT exam requirements, I’d like to show you an example of when you might need to configure these areas.
In this Cisco CCNA Training video, I’ll go over a situation where you might need to configure stub areas, including the correct usage of the “default-information originate” command, in detail, to control the distribution of default information. I’ll also show you when to use the “always” function.