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www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094a88.shtml - 25k -

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Posted by crouse

stub area is the area which reduces the size of the link-state database to be maintained in an area.

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Posted by HamidAliKhan

1. A stub area reduces the size of the link-state database to be maintained in an area, which in turn result in less overhead in terms of memory capacity, computational power, and convergence time.
2. The routing in Stub and totally stubby areas is based
On default gateway. A default route (0.0.0.0) needs to be configured to route traffic outside the area.
3. The stub areas suited for Hub-Spoke topology.
4. Area 0 is not configured as Stubby or totally Stubby.
This is because stub areas are configured mainly to avoid carrying external
Routes, whereas Area 0 carries external routes.

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Posted by peter186