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Router R1, in AS 65540, has the export policy shown below. It advertises an aggregate route to eBGP peer router R2 in 65550. What is the AS Path of the aggregate route received by router R2?
Suggested Answer: C
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33 comments · newest first
TO
Tonette
11 months ago
I agree with Jani, but I'm not sure about the specifics.
AL
Alex
11 months ago
Wait, is it really that simple?
DE
Desmond
11 months ago
Nah, it's definitely 65550 65540.
LE
Lemuel
11 months ago
I think it should be 65540 65540.
JA
Jani
12 months ago
The AS Path for an aggregate route usually includes the originating AS.
LO
Louvenia
12 months ago
I practiced a similar question, and I think the AS Path should reflect the originating AS and the peer AS. So, maybe it's D: 65550 65540?
NI
Nilsa
1 year ago
I'm a bit confused about whether the aggregate route would include the AS of the peer router R2. I feel like it might be 65550 65540, but I can't recall clearly.
BR
Brigette
1 year ago
I remember a practice question where we had to consider the AS Path for an aggregate route, and I think it was just the originating AS. Could it be just 65540?
DA
Daniel
1 year ago
I think the AS Path for the aggregate route should include the AS number of R1, which is 65540, but I'm not sure if it adds anything else.
BE
Bette
1 year ago
I think the key here is to look at the AS numbers involved. R1 is in 65540, and it's advertising the aggregate to R2 in 65550. So the AS path R2 will receive should be 65540.
CL
Clay
1 year ago
I'm a bit confused by the export policy. Does that mean R1 is prepending its own AS number to the aggregate route? Or is it adding the AS number of the routes it's aggregating?
WA
Wai
1 year ago
Hmm, this looks like a BGP routing question. I'll need to carefully analyze the export policy and the AS numbers to determine the AS path.
SI
Simona
1 year ago
Okay, let me think this through step-by-step. Router R1 is in AS 65540 and is advertising an aggregate route to eBGP peer R2 in AS 65550. The question is asking about the AS path that R2 will receive.
CA
Cathrine
1 year ago
I'm feeling pretty confident about this one. I think the read replica (A) is the way to go. It's a simple fix that should address the connection issue without too much hassle. Plus, it's a common technique, so I'm familiar with how to implement it.
NI
Nicholle
1 year ago
Hmm, I'm a bit unsure about this one. I know SmartScreen is related to security, but I'm not sure how to configure the logging. I'll have to think this through carefully.
CL
Clay
2 years ago
Hmm, that makes sense. The AS Path should include both AS numbers in the export policy.
ME
Melissa
2 years ago
I believe it is 65540 1 because of the export policy shown in the image.
CL
Clay
2 years ago
I think the AS Path of the aggregate route received by router R2 is 65540.
BR
Brynn
2 years ago
Haha, this question is making my head spin! I'm just going to randomly pick A) 65540 and hope for the best.
SK
Skye
2 years ago
Johnna: Let's see who got it right!
CA
Carolann
2 years ago
I'm not sure, but I think it might be C) 65540 65540.
JO
Johnna
2 years ago
Really? I was leaning towards B) 65540 1.
MA
Margurite
2 years ago
Don't worry, I think the answer is actually D) 65550 65540.
SC
Scot
2 years ago
This seems like a tricky one. I'm going to go with C) 65540 65540, since the export policy shows that the aggregate route will include the AS number twice.
SA
Sarina
2 years ago
Yes, that makes sense. The AS Path of the aggregate route received by router R2 should be 65540 65540.
EU
Eun
2 years ago
I think you're on the right track. The AS number is repeated in the export policy.
PU
Pura
2 years ago
Hmm, I'm not sure. I was thinking D) 65550 65540, since the aggregate route is being advertised to an eBGP peer in AS 65550.
TH
Theresia
2 years ago
I think the correct answer is B) 65540 1. The aggregate route will include the AS number of the router that originates it (65540), plus the AS number of the peer router (1).
MA
Mattie
2 years ago
I believe the answer is D) 65550 65540, considering the AS Path of the aggregate route received by router R2.
CA
Catina
2 years ago
I think it might be C) 65540 65540, as the aggregate route includes the AS number of the router that originates it twice.
CA
Cary
2 years ago
Yes, the AS Path of the aggregate route received by router R2 is 65540 1.
DE
Derick
2 years ago
I agree with you, the correct answer is B) 65540 1.
NE
Nell
2 years ago
I agree with you, the correct answer is B) 65540 1.