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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
12 days 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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Alishia
13 days 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
15 days ago
I agree with Micaela, VRF allows for separate routing tables for different customers.
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Elinore
16 days 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
18 days 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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Kristin
6 days ago
I think VRF is the correct answer, it helps keep the IP ranges separate.
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Vesta
19 days 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
25 days ago
I think the answer is A) VRF.
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