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Cisco 300-410 Exam - Topic 4 Question 125 Discussion

Refer to the exhibit.Refer to the exhibit. The primary link between R1 and R2 went down but R3 is still advertising the 192.166.200.0/24 network to R1 and the 192.166.100.0/24 network to R2, which creates a loop. Which action resolves the issue?
A) Configure the eigrp stub command under the ElGRP process on R3
B) Configure the summary address 192.168.0.0 255.255.0.0 100 command on R3
C) Configure the eigrp stub leak-map command under the EIGRP process on R1
D) Configure the eigrp stub command under the ElGRP process on R2

Cisco 300-410 Exam - Topic 4 Question 125 Discussion

Actual exam question for Cisco's 300-410 exam
Question #: 125
Topic #: 4
[All 300-410 Questions]

Refer to the exhibit.

Refer to the exhibit. The primary link between R1 and R2 went down but R3 is still advertising the 192.166.200.0/24 network to R1 and the 192.166.100.0/24 network to R2, which creates a loop. Which action resolves the issue?

Show Suggested Answer Hide Answer
Suggested Answer: A

by Brent at May 07, 2026, 07:09 PM

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Nickolas
3 days ago
D won't resolve the loop issue effectively.
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Mozelle
8 days ago
I lean towards D. Stubbing on R2 might fix it too.
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Micaela
13 days ago
But B could reduce routing table size.
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Tamesha
19 days ago
A is safer, prevents unnecessary updates.
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Narcisa
24 days ago
I think B is better. Summary address could simplify routes.
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Nickolas
29 days ago
Option A seems right. EIGRP stub on R3 could help.
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Shaniqua
1 month ago
I feel like it's about preventing loops.
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Jordan
1 month ago
This question is tricky!
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Mattie
1 month ago
Surprised that R3 is still advertising after the primary link failure!
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Carin
2 months ago
I disagree, B could also solve the loop issue.
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Lauryn
2 months ago
Wait, why would we configure anything on R2? Seems off.
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Broderick
2 months ago
I think option A is the best choice here.
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Yen
2 months ago
R3 is still advertising networks even with the link down.
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Marilynn
2 months ago
I think the eigrp stub command on R2 could be the right move, but I’m a bit confused about how it interacts with R3's advertisements.
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Nina
4 months ago
I feel like the summary address option could be a solution, but I can't recall if it directly addresses the loop issue.
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Lisandra
4 months ago
This question seems similar to one we practiced where a loop was created due to improper route advertisement. I think configuring a stub might help.
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Carrol
4 months ago
I remember studying EIGRP stub configurations, but I'm not sure if it applies here since R3 is still advertising routes.
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