|
An area can be qualified as a stub or
totally stubby when it meets the following criteria:
- There is a single exit point from
that area.
- The area is not needed as a transit
area for virtual links. Virtual links are discussed at the end of
this module.
- No ASBR is internal to the stub
area.
- The area is not the backbone area,
or Area 0.
These criteria are important because a
stub or totally stubby area is configured primarily to exclude external
routes. If these criteria are not met, external links may be injected
into the area, invalidating their stubby nature.
|
Interactive Media Activity
Drag and Drop: ID the Area
Upon completion of this activity, the student will be able to
identify the difference between stub and totally stubby areas
in OSPF.

|
|
|
|