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Exam 350-501 topic 1 question 187 discussion

Actual exam question from Cisco's 350-501
Question #: 187
Topic #: 1
[All 350-501 Questions]


Refer to the exhibit. Export statistics received do not include the BGP next hop.
Which statement about the NetFlow export statistics is true?

  • A. Loopback 0 must be participating in BGP for it to be included in the export statistics.
  • B. To include the BGP next hop in the export statistics, those keywords must be included with the version 9 entry.
  • C. The origin AS and the peer-as will be included in the export statistics.
  • D. Only the origin AS of the source router will be included in the export statistics.
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Suggested Answer: B 🗳️
Reference:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/netflow/configuration/xe-16-12/nf-xe-16-12-book/cfg-nflow-data-expt-xe.html
by saman at Jan. 28, 2021, 2:17 a.m.

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ariasse
5 months, 3 weeks ago
Well, "B" seems to be right though the question is poorly worded: "bgp-nexthop --Includes BGP next hop-related information in the export statistics." https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/netflow/configuration/15-mt/nf-15-mt-book/cfg-nf-bgp-next-hop.html
upvoted 1 times
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Mrtadge
2 years, 3 months ago
A is wrong, C is wrong (you need peer-as syntax for that to work) and D is wrong (it sends the source and destination, not just source). So only B fits. Although poorly worded, it also makes sense. Welcome to Cisco questioning!
upvoted 4 times
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beenardino
2 years, 5 months ago
no it is b this is the correct syntax ip flow-export version 9 [origin-as | peer-as] bgp-nexthop https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/netflow/configuration/15-mt/nf-15-mt-book/cfg-nf-bgp-next-hop.html
upvoted 4 times
beenardino
2 years, 5 months ago
Disregard, I am stupid : To include the BGP next hop in the export statistics, those keywords must be included with the version 9 entry. it litteraly says " ip flow-export version 9 [origin-as | peer-as] bgp-nexthop " The correct answer is B
upvoted 2 times
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saman
2 years, 9 months ago
C The origin-as keyword specifies that export statistics include the originating autonomous system for the source and destination. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/netflow/configuration/xe-16-12/nf-xe-16-12-book/cfg-nflow-data-expt-xe.html
upvoted 1 times
nolbi
2 years, 9 months ago
with "origin-as" there are no peer information transmittet. You need the "peer-as" keyword for BGP peering information... https://www.noction.com/blog/netflow-bgp See Topic "BGP in Netflow v9"
upvoted 3 times
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