CCNA:LAB No# 12 Configuration of OSPF with different Area types
Uploaded the packet tracer file here:
https://drive.google.com/file/d/0B3-H...
Type 1 - Represents a router
Type 2 - Represents the DR (designated router)
Type 3 - A network link summary (internal route)
Type 4 - Represents an ASBR
Type 5 - A route external to the OSPF domain
Type 7 - Used in stub areas in place of a type 5 LSA
Standard areas can contain LSAs of type 1, 2, 3, 4, and 5, and may contain an ASBR. The backbone is considered a standard area.
Stub areas can contain type 1, 2, and 3 LSAs. A default route is substituted for external routes.
Totally stubby areas can only contain type 1 and 2 LSAs, and a single type 3 LSA. The type 3 LSA describes a default route, substituted for all external and inter-area routes.
Not-so-stubby areas implement stub or totally stubby functionality yet contain an ASBR. Type 7 LSAs generated by the ASBR are converted to type 5 by ABRs to be flooded to the rest of the OSPF domain.