Discuss Cisco 300-410 Exam Topic 13 Question 92

Refer to the exhibit.

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

AConfigure the mtu Ignore command on the Interfaces of R1 and R2

BConfigure the ip ospf network point-to-point command on the interfaces of R1 and R2

CConfigure the ip ospf network broadcast command on the interfaces of R1 and R2

DConfigure the neighbor 2.2.2.2 command on R1 under the OSPF process

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

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37 comments · newest first

Francesco 11 months ago

I thought D was the answer, but I guess not!

Teri 11 months ago

C is also a valid option, but B seems more straightforward.

Jodi 11 months ago

Wait, are we sure about that? What if the MTU is the issue?

Britt 11 months ago

Definitely agree with B, it’s the standard fix.

Bernardo 12 months ago

I think option B is the right choice for OSPF.

Elmer 12 months ago

I vaguely recall that specifying a neighbor IP can help with establishing relationships, but I’m not confident if that’s the best solution here.

Georgene 1 year ago

I’m a bit confused about the broadcast vs. point-to-point commands. I feel like I need to double-check which one applies to this scenario.

Cecil 1 year ago

I think we practiced a question similar to this where configuring OSPF network types was key. Maybe the point-to-point option is correct?

Andree 1 year ago

I remember something about MTU settings affecting neighbor relationships, but I'm not sure if "mtu ignore" is the right command here.

Shawnna 1 year ago

I'm pretty confident this is a point-to-point network, so I'll go with option B and configure the ip ospf network point-to-point command.

Freeman 1 year ago

Okay, I've got a strategy. I'll focus on the network type configuration first, since that seems to be the root cause of the problem.

Latanya 1 year ago

Hmm, I'm a bit confused by the options here. I'll need to carefully review the OSPF network types and how they impact neighbor relationships.

Keva 1 year ago

This looks like a classic OSPF configuration issue. I think the key is to determine the network type between the two routers.

Vincenza 1 year ago

Okay, let me take my time with this. I'll methodically go through each image, make notes on the key features, and then choose the best match.

Verdell 1 year ago

Option B looks like the clear winner to me. Exporting the logs to BigQuery and setting the table expiration to 60 days is the most efficient way to analyze the data and follow Google's best practices. I feel confident in this solution.

Ronny 1 year ago

Hmm, this looks like a tricky one. I'll need to think carefully about the features available to Global applications.

Edward 2 years 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.

Stephane 2 years ago

↳ replying to Edward

We should verify before making any changes.

Karrie 2 years ago

↳ replying to Edward

Maybe it's just a typo in the configuration.

Maurine 2 years ago

↳ replying to Edward

Let's double-check the interfaces first.

Frankie 2 years ago

↳ replying to Edward

We should verify before making any changes.

Lynelle 2 years ago

↳ replying to Edward

Maybe there's a typo in the configuration.

Carmelina 2 years ago

↳ replying to Edward

Let's double-check the interfaces first.

Vivan 2 years 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.

Stephanie 2 years ago

↳ replying to Vivan

Neighbor command seems like a long shot. OSPF network broadcast sounds more reasonable.

Larae 2 years ago

↳ replying to Vivan

I would go with the point-to-point option instead.

Pedro 2 years ago

↳ replying to Vivan

Yeah, I agree. I think OSPF network broadcast is the way to go.

Marion 2 years ago

↳ replying to Vivan

Haha, blind date for routers? That's funny.

Felton 2 years ago

But wouldn't configuring the ip ospf network broadcast command on the interfaces of R1 and R2 also work?

Ruby 2 years 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.

Lina 2 years ago

↳ replying to Ruby

Let's go ahead and try that fix on both R1 and R2 interfaces.

Isaiah 2 years ago

↳ replying to Ruby

I think you're right. Configuring the ip ospf network point-to-point command should help establish the neighbor relationship.

Lemuel 2 years ago

I disagree, I believe the correct answer is D) Configure the neighbor 2.2.2.2 command on R1 under the OSPF process.

Felton 2 years ago

I think the answer is B) Configure the ip ospf network point-to-point command on the interfaces of R1 and R2.

Alyce 2 years ago

The MTU issue is definitely the culprit here. Configuring the MTU Ignore command is the way to go.

Francisca 2 years ago

↳ replying to Alyce

B) I agree, that should fix the problem.

Rima 2 years ago

↳ replying to Alyce

A) Configure the mtu Ignore command on the Interfaces of R1 and R2

Cisco 300-410 Exam - Topic 13 Question 92 Discussion