On the OSPFv3 network shown in the figure, the LSDB (Link-State Database) of R2 contains ______ Router-LSAs. (Enter only digits.)
3
1. Understanding Router-LSAs in OSPFv3
Router-LSA (Type 1 LSA) is generated by every OSPFv3 router to describe its own links and connected networks within the same area.
Each router in an OSPF area generates exactly one Router-LSA to advertise its own topology information.
Router-LSAs are flooded throughout the area but do not cross area boundaries.
2. Analyzing the Given OSPFv3 Network
The topology consists of three routers: R1, R2, and R3, all connected in OSPFv3 Area 0.
Since all three routers participate in OSPFv3, each router generates its own Router-LSA (Type 1 LSA).
R2, as an OSPF router, will have its own Router-LSA and also receive the Router-LSAs from R1 and R3.
3. Counting the Number of Router-LSAs in R2’s LSDB
R1 generates 1 Router-LSA (for itself).
R2 generates 1 Router-LSA (for itself).
R3 generates 1 Router-LSA (for itself).
Total Router-LSAs in R2’s LSDB = 3 (one from each router).
Final Answer:
Answer: 3
HCIP-Datacom-Advanced Routing & Switching Technology References:
OSPFv3 LSA Types and Their Roles
Understanding Router-LSA (Type 1) and Its Function in LSDB
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