Description: A totally stub area in OSPF (Open Shortest Path First) is a type of area that does not receive external routes or inter-area routes. This means that routers within this area only know the internal routes of their own area and do not have information about routes coming from other areas or external networks. This configuration is primarily used to reduce the amount of routing information exchanged between routers, which can improve network efficiency and performance. Totally stub areas are useful in environments where there is a desire to simplify the routing table and minimize resource usage, such as in networks with lower-capacity devices or in situations where external connectivity is not needed. For an area to be considered totally stub, it must be explicitly configured on the routers that comprise it, and area type 4 must be used in the OSPF configuration. This feature allows routers within the stub area to send and receive only essential information, contributing to a more efficient and error-prone operation in the network.
