6. OSPF LSA types

Question 1

What are the OSPF LSA types?

Answer 1

• Type 1 - Router
• Type 2 - Network
• Type 3 - Network summary
• Type 4 - ASBR
• Type 5 - AS
• Type 7 - NSSA
• Type 8 - Link LSA (OSPFv3)
• Type 9 Inter-area Prefix LSA (OSPFv3)

Question 2

How to find the self originated LSA types?

Answer 2

show ip ospf database *** self-originate

Question 3

What is in the type 3 LSA?

Answer 3

Summary of another area. The type 1 and type 2 are converted into 3

Question 4

What is in the type 4 LSA?

Answer 4

Provides information on how to reach the ASBR to reach external networks advertised by type 5 LSAs

Question 5

What is in the type 7 LSAs?

Answer 5

Not-so-Stubby-Area to be used to allow redistribution in non-regular areas

Question 6

What is in the type 8 LSAs?

Answer 6

Needed because LSA 1 and 2 do not have addresses anymore in OSPFv3