OSPFv3 Fundamentals

10 important questions on OSPFv3 Fundamentals

What kind of hierarchy is used by OSPFv3

Just like OSPFv2 for IPv4, OSPFv3 for IPv6 uses a 2 level hierarchy using a backbone area 0 and the other areas connected to the backbone area.

What type of areas are used by OSPFv3?

Just like OSPFv2, OSPFv3 can have multiple types of areas, it actually uses the same types:
Normal area
Stub Area
Totally Stub Area
Not So Stubby Area (NSSA)
Totally Not So Stubby Area (Totally NSSA)

Does OSPFv3 uses Area Border Routers (ABRs) and Autonomous System Border Routers (ASBRs)?

Yes, just like OSPFv2, OSPFv3 also uses ABRs and ASBRs.

What multicast addresses are used by OSPFv3?

FF02::5 for normal communication
FF02::6 for communication with the DR

Does OSPFv3 uses network statements just like OSPFv2 to add interfaces to OSPF?

No OSPFv3 does not use network statements with wildcard masks.

LSA Type 3 in OSPFv2 is called a Summary LSA. What is it called in OSPFv3?

LSA Type 3 LSAs are called Inter-Area Prefix LSAs in OSPFv3

LSA Type 4 in OSPFv2  is called an ASBR Summary LSA. What is it called in OSPFv3?

LSA Type 4 LSAs are called Inter-Area Router LSAs in OSPFv3

What are the 8 different LSA types used in OSPFv3?

LSA Type 1: Router LSA
LSA Type 2: Network LSA
LSA Type 3: Inter-Area Prefix LSA
LSA Type 4: Inter-Area Router LSA
LSA Type 5: External LSA
LSA Type 7: NSSA External LSA
LSA Type 8: Link LSA
LSA Type 9: Prefix LSA

OSPFv3 has support for multiple address families. What is meant by this?

It supports both IPv4 and IPv6

In the routing table when using OSPFv3, what is notable about the next-hop address for IPv6 routes learned through OSPF?

They use the link-local address of the neighboring router

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