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Cisco Exam 300-410 Topic 13 Question 92 Discussion

Actual exam question for Cisco's 300-410 exam
Question #: 92
Topic #: 13
[All 300-410 Questions]

Refer to the exhibit.

Refer to the exhibit R1 cannot establish a neighbor relationship with R2 Which action resolves the issue"?

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Suggested Answer: A

In OSPF (Open Shortest Path First), the MTU (Maximum Transmission Unit) size must match on both sides of a link for OSPF neighbors to form an adjacency12.If the MTU sizes do not match, the OSPF adjacency will not form, and the routers will not become neighbors12.

In this case, R1 cannot establish a neighbor relationship with R2.One possible reason for this could be a mismatch in the MTU size on the interfaces of R1 and R212.

To resolve this issue, you can configure themtu ignorecommand on the interfaces of R1 and R2 (Option A).This command allows OSPF to ignore the MTU size when determining if it can form an adjacency with a neighbor12.This means that even if the MTU sizes do not match, OSPF will still form an adjacency, and R1 and R2 will become neighbors12.


OSPF MTU Mismatch - NetworkLessons.com

Understanding OSPF MTU Mismatch Conditions and Solutions - Cisco

by Blair at Jun 30, 2024, 02:53 AM

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Edward
5 months ago
Wait, are we sure this isn't just a typo in the configuration? Maybe we need to double-check the interfaces before jumping to any conclusions.
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Stephane
3 months ago
We should verify before making any changes.
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Karrie
4 months ago
Maybe it's just a typo in the configuration.
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Maurine
4 months ago
Let's double-check the interfaces first.
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Frankie
4 months ago
We should verify before making any changes.
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Lynelle
4 months ago
Maybe there's a typo in the configuration.
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Carmelina
4 months ago
Let's double-check the interfaces first.
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Vivan
5 months ago
Haha, the neighbor command? Really? That's like trying to set a blind date for your routers. I'd go with the OSPF network broadcast option.
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Stephanie
4 months ago
Neighbor command seems like a long shot. OSPF network broadcast sounds more reasonable.
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Larae
4 months ago
I would go with the point-to-point option instead.
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Pedro
4 months ago
Yeah, I agree. I think OSPF network broadcast is the way to go.
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Marion
4 months ago
Haha, blind date for routers? That's funny.
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Felton
5 months ago
But wouldn't configuring the ip ospf network broadcast command on the interfaces of R1 and R2 also work?
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Ruby
5 months ago
I'm not sure about that. Shouldn't we be looking at the OSPF network type instead? The point-to-point command seems like the right fix to me.
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Lina
4 months ago
Let's go ahead and try that fix on both R1 and R2 interfaces.
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Isaiah
5 months ago
I think you're right. Configuring the ip ospf network point-to-point command should help establish the neighbor relationship.
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Lemuel
5 months ago
I disagree, I believe the correct answer is D) Configure the neighbor 2.2.2.2 command on R1 under the OSPF process.
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Felton
6 months ago
I think the answer is B) Configure the ip ospf network point-to-point command on the interfaces of R1 and R2.
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Alyce
6 months ago
The MTU issue is definitely the culprit here. Configuring the MTU Ignore command is the way to go.
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Francisca
5 months ago
B) I agree, that should fix the problem.
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Rima
5 months ago
A) Configure the mtu Ignore command on the Interfaces of R1 and R2
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