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Cisco 400-007 Exam - Topic 3 Question 34 Discussion

Refer to the exhibit.Company XYZ BGP topology is as shown in the diagram. The interface on the LA router connected toward the 10.1.5.0/24 network is faulty and is going up and down, which affects the entire routing domain. Which routing technique can be used in the routing policy design so that the rest of the network is not affected by the flapping issue?
D) Use route aggregation on LA router to summarize the 10.1.4.0V24, 10.1.5.0724, 10.1.6.0/24. and 10.1.7.0/24 networks toward Chicago
A) Use route dampening on LA router for the 10 1 5 0/24 network so that it does not get propagated when it flaps up and down
B) Use route filtering on Chicago router to block the 10.1.5.0/24 network from coming in from the LA router
C) Use route filtering on LA router to block the 10.15.0/24 network from getting propagated toward Chicago and New York

Cisco 400-007 Exam - Topic 3 Question 34 Discussion

Actual exam question for Cisco's 400-007 exam
Question #: 34
Topic #: 3
[All 400-007 Questions]

Refer to the exhibit.

Company XYZ BGP topology is as shown in the diagram. The interface on the LA router connected toward the 10.1.5.0/24 network is faulty and is going up and down, which affects the entire routing domain. Which routing technique can be used in the routing policy design so that the rest of the network is not affected by the flapping issue?

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Suggested Answer: D

by Nobuko at Mar 04, 2024, 10:32 AM

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Valentine
9 months ago
Route dampening is the best choice for stability!
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Diego
9 months ago
Route filtering on Chicago? Nah, that won't solve the flapping issue.
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Dyan
10 months ago
Surprised that route aggregation is even an option here!
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Scot
10 months ago
I think route filtering could work too, but dampening seems more effective.
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Percy
10 months ago
Route dampening is definitely the way to go here.
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Daren
10 months ago
I’m leaning towards option A, using route dampening. It sounds like the most direct way to handle the instability of that specific network.
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Mignon
11 months ago
Route aggregation seems like it could simplify the routing table, but I’m not convinced it would solve the flapping problem. I need to think more about that.
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Almeta
11 months ago
I think route filtering could be a good option too, especially if we want to prevent the faulty route from affecting other routers. I saw a similar question in our practice tests.
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Alecia
11 months ago
I remember route dampening being mentioned in class, but I'm not entirely sure how it works in practice. Does it really help with flapping issues?
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Anjelica
11 months ago
I'm leaning towards option B, using route filtering on the Chicago router to block the 10.1.5.0/24 network from coming in. That seems like a more targeted solution than dampening or aggregation.
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Ammie
11 months ago
Okay, I've got it. The answer is route dampening on the LA router for the 10.1.5.0/24 network. That way, the flapping won't get propagated to the rest of the network.
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Latrice
11 months ago
Hmm, I'm a bit confused by the options. I'm not sure if route dampening, filtering, or aggregation is the best approach here. I'll need to think through the pros and cons of each.
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Viola
11 months ago
This seems like a straightforward BGP routing policy question. I think the key is to find a way to isolate the flapping interface on the LA router without affecting the rest of the network.
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Michal
11 months ago
This looks like a straightforward question about the Avaya Session Border Controller. I'm pretty confident I can answer this one.
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Ettie
11 months ago
I think considering a custom workflow might be good since it could allow us to tailor the solution to the customer's needs.
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Ressie
11 months ago
Okay, I've got this. The key is to identify the portfolio that has the best expected return for its level of risk. That's the essence of the Efficient Frontier - maximizing return while minimizing risk. I'll walk through the options and determine which one best fits that description.
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Ahmad
11 months ago
I'm a bit confused on this one. The options don't seem super straightforward to me. I'll need to review the FlexVPN concepts again before answering.
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Geraldine
11 months ago
I'm uncertain about Amazon RDS and Amazon ES; I don't recall if they support all the formats we need or if they're cost-effective compared to the others.
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Jamie
2 years ago
Actually, using route aggregation on LA router to summarize the networks could also help in reducing the impact of the flapping interface.
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Kenny
2 years ago
But wouldn't route filtering on LA router be more effective in preventing the issue from spreading to other routers?
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Rashad
2 years ago
I think using route filtering on Chicago router to block the problematic network might be a better option.
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Jamie
2 years ago
I agree with Kenny. Route dampening can help stabilize the network during flapping events.
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Kenny
2 years ago
I think we should use route dampening on LA router to prevent the flapping from affecting the rest of the network.
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Kenda
2 years ago
Using route filtering on LA router to block the 10.1.5.0/24 network from getting propagated toward Chicago and New York could also work, right?
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Skye
2 years ago
I agree with Gertude, route dampening would help prevent the flapping issue from affecting the rest of the network.
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Deangelo
2 years ago
But wouldn't using route filtering on the Chicago router to block the 10.1.5.0/24 network also be a good solution?
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Gertude
2 years ago
I think the best option would be to use route dampening on the LA router for the 10.1.5.0/24 network.
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Deangelo
2 years ago
You know, I was just thinking the same thing. Route filtering is a more direct approach and might be a better option if the flapping is really problematic.
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Bernadine
2 years ago
But what if the flapping is really severe? Route dampening might not be enough to completely isolate the issue. Option B, using route filtering on the Chicago router to block the 10.1.5.0/24 network, could be a more reliable solution.
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Tequila
2 years ago
I think option A is the way to go. Using route dampening on the LA router for the 10.1.5.0/24 network will help suppress the route updates when the interface is flapping, so the rest of the network won't be affected.
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Jaime
2 years ago
Hmm, this is a tricky one. The issue seems to be with the interface on the LA router, which is causing the 10.1.5.0/24 network to flap up and down. We need to find a way to isolate that problem and prevent it from affecting the rest of the network.
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Beckie
2 years ago
C: Good point, route filtering might be too broad of a solution in this case
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Lenita
2 years ago
D: It might be better to isolate the problem at the source, the LA router, to avoid unnecessary traffic filtering
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Regenia
2 years ago
C: What about using route filtering on Chicago router to block the 10.1.5.0/24 network?
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Werner
2 years ago
A: Yes, route dampening can help stabilize the routing table in case of flapping interfaces
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Jade
2 years ago
B: That sounds like a good solution to prevent the flapping from affecting the rest of the network
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Dewitt
2 years ago
A: Use route dampening on LA router for the 10 1 5 0/24 network so that it does not get propagated when it flaps up and down
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