Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 219

You have just completed an OSPF implementation. While executing your verification plan, you determine that R1 is not able to establish full OSPF adjacency with
R2. The show ip ospf neighbor command output on R1 shows that R2 is stuck in the INIT state.
What could be the cause of this problem?

Answer options

• A. DR and BDR election errors between R1 and R2.
• B. The R2 router has not received the OSPF hello packets from the R1 router.
• C. Mismatched interface maximum transmission unit (MTU) configuration between the R1 and R2.
• D. Mismatched OSPF hello interval configuration between the R1 and R2.

Correct answer:

Explanation

The correct answer is B because if R2 has not received OSPF hello packets from R1, it cannot progress beyond the INIT state. Options A, C, and D are incorrect as they pertain to different issues that wouldn't prevent R2 from receiving hello packets, which are essential for establishing adjacency.