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Exam 300-510 topic 1 question 40 discussion

Actual exam question from Cisco's 300-510
Question #: 40
Topic #: 1
[All 300-510 Questions]


Refer to the exhibit. CE1 and CE2 cannot communicate through the service provider BGP peering is established between PE1 and PE2. IS-IS is the only routing protocol running in the service provider core. What step can be done to troubleshoot the issue?

  • A. Switch the IGPs running in the core from IS-IS to OSPF to support a Cisco MPLS TE tunnel from PE1 to PE2.
  • B. Configure BGP between CE and PE routers.
  • C. Confirm that IS-IS is running with metric-style narrow.
  • D. Verify the MPLS LSPs.
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️
by Jamilo at Jan. 29, 2021, 8:07 a.m.

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terebok
Highly Voted 3 years, 8 months ago
'D' is correct answer IMO
upvoted 5 times
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terebok
Highly Voted 3 years, 8 months ago
I think 'D' is correct answer. CE1 won't be able to talk to CE2 in case underlying MPLS LSP is failed
upvoted 5 times
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serban_17
Most Recent 7 months, 3 weeks ago
It doesn't say anything about the CE-PE routing. If that's in place and working fine, the answer is D. If not, routing between CE and PE should first be investigated and B makes more sense. The question here is most probably incomplete.
upvoted 1 times
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thejag
10 months, 3 weeks ago
Selected Answer: D
Must be D
upvoted 1 times
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DUsoo
1 year ago
Selected Answer: D
D is correct one!
upvoted 1 times
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Refrag
2 years, 4 months ago
Selected Answer: D
A: You are not going to chance the whole core IGP B: Does not make sense to additionally run BGP here C: How is a narrow metric going to help? D: Makes sense to verify underlying protocol first.
upvoted 2 times
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Jjsa1994
3 years, 6 months ago
i think its E tho
upvoted 1 times
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mjyasini
3 years, 6 months ago
"C " is correct
upvoted 1 times
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Jamilo
3 years, 9 months ago
I think its B
upvoted 2 times
...
Community vote distribution
A (35%)
C (25%)
B (20%)
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