Cisco
300-420 · Question #58
Which OSPF area blocks LSA Type 3, 4 and 5, but allows a default summary route?
The correct answer is D. totally stubby. A totally stubby area does not flood network summary LSAs (Type 3). It stifles Type 4 LSAs, as well. Like regular stub areas, totally stubby areas do not flood Type 5 LSAs. A totally stubby area sends just a single LSA for the default route.
Advanced Addressing and Routing Solutions
Question
Which OSPF area blocks LSA Type 3, 4 and 5, but allows a default summary route?
Options
- Anormal
- Bstub
- CNSSA
- Dtotally stubby
How the community answered
(59 responses)- A5% (3)
- B2% (1)
- C2% (1)
- D92% (54)
Explanation
A totally stubby area does not flood network summary LSAs (Type 3). It stifles Type 4 LSAs, as well. Like regular stub areas, totally stubby areas do not flood Type 5 LSAs. A totally stubby area sends just a single LSA for the default route.
Topics
#OSPF#Area Types#LSA Filtering#Routing Protocols
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