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Exam 300-410 topic 1 question 492 discussion

Actual exam question from Cisco's 300-410
Question #: 492
Topic #: 1
[All 300-410 Questions]

Refer to the exhibit.



An OSPF neighbor relationship between R2 and R3 is showing stuck in EXCHANGE/EXSTART state. The neighbor is established between R1 and R2. The network engineer can ping from R2 to R3 and vice versa, but the neighbor is still down. Which action resolves the issue?

  • A. Administrative “shut then no shut” both router interfaces.
  • B. Enable OSPF on the interface, which is required.
  • C. Restore the Layer 2/Layer 3 connectivity issue in the ISP network.
  • D. Match MTU on both router interfaces or ignore MTU.
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Suggested Answer: D 🗳️
by seal2 at Sept. 11, 2023, 3:11 p.m.

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[Removed]
9 months, 2 weeks ago
Selected Answer: D
D is correct
upvoted 1 times
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ZamanR
1 year, 4 months ago
D is correct Explanation After two OSPF neighboring routers establish bi-directional communication and complete DR/BDR election (on multi-access networks), the routers transition to the exstart state. In this state, the neighboring routers establish a master/slave relationship and determine the initial database descriptor (DBD) sequence number to use while exchanging DBD packets. Neighbors Stuck in Exstart/Exchange State The problem occurs most frequently when attempting to run OSPF between a Cisco router and another vendor’s router. The problem occurs when the maximum transmission unit (MTU) settings for neighboring router interfaces don’t match. If the router with the higher MTU sends a packet larger that the MTU set on the neighboring router, the neighboring router ignores the packet.
upvoted 2 times
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seal2
1 year, 8 months ago
Selected Answer: D
A. Would do nothing to fix this except cause it to happen again B. already enabled C. clearly, they are already connected D. this can fix the issue potentially
upvoted 3 times
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