In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Assuming that there are no stub networks, which of the following statements regarding type 4 LSA generation is true?
A.
Router R1 generates a type 4 LSA that is flooded to areas 0, 1, and 2.
B.
Router R3 generates a type 4 LSA that is flooded to areas 0, 1, and 2.
C.
Router R3 generates a type 4 LSA that is flooded to areas 0 and 2.
D.
Router R3 generates a type 4 LSA that is flooded to area 0, and router R6 generates a type 4 LSA that is flooded to area 2.
Comprehensive and Detailed Explanation From Exact Extract:
FromNokia 7750 SR OS OSPF Guide — LSA Types and Area Border Routers:
“Type 4 LSAs (ASBR Summary LSAs) are generated by ABRs to inform other areas about the location (Router ID) of the ASBR. Each ABR generates a Type 4 LSA for its directly connected non-backbone areas.”
R3 generates Type 4 LSA into Area 0.
R6 generates Type 4 LSA into Area 2.
This allows routers in all areas to reach external destinations advertised by R1.
Contribute your Thoughts:
Chosen Answer:
This is a voting comment (?). You can switch to a simple comment. It is better to Upvote an existing comment if you don't have anything to add.
Submit