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Cisco Exam 300-410 Topic 12 Question 96 Discussion

Actual exam question for Cisco's 300-410 exam
Question #: 96
Topic #: 12
[All 300-410 Questions]

Which Layer 3 VPN attribute allows different customers to connect to the same MPLS network wrth overlapping IP ranges?

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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 Truman at Aug 29, 2024, 01:15 AM

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Felton
2 months ago
I don't know, man. All this MPLS VPN stuff makes my head spin. At least it's not a question about subnetting or default gateways, am I right?
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Janine
1 months ago
User 2: I think the answer is VRF.
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Magnolia
2 months ago
User 1: Yeah, MPLS VPNs can be confusing.
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Alishia
2 months ago
I'm not sure, but I think C) MP-BGP could also be a possible answer for this question.
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Haydee
2 months ago
I agree with Micaela, VRF allows for separate routing tables for different customers.
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Elinore
2 months ago
RD? Really? That's for uniquely identifying a VPN, not for handling overlapping IP spaces. These options are a bit of a mixed bag.
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Janna
2 months ago
I was thinking MP-BGP might be the answer, since it's used to distribute VPN routing info. But VRF makes more sense for keeping those IP ranges separate.
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Christene
1 months ago
Definitely, VRF is the Layer 3 VPN attribute that allows different customers to connect with overlapping IP ranges.
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Maryln
1 months ago
MP-BGP is used for distributing VPN routing info, but VRF is what keeps the IP ranges separate.
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Colton
1 months ago
Yeah, VRF is the way to go for different customers with overlapping IP ranges.
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Kristin
2 months ago
I think VRF is the correct answer, it helps keep the IP ranges separate.
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Vesta
2 months ago
VRF sounds like the right answer here - it allows each customer to have their own isolated routing table, even with overlapping IP ranges.
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Micaela
3 months ago
I think the answer is A) VRF.
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