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Exam AWS Certified Advanced Networking - Specialty ANS-C01 All Questions

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Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 144 discussion

A company has two AWS Direct Connect links. One Direct Connect link terminates in the us-east-1 Region, and the other Direct Connect link terminates in the af-south-1 Region. The company is using BGP to exchange routes with AWS.

How should a network engineer configure BGP to ensure that af-south-1 is used as a secondary link to AWS?

  • A. • On the Direct Connect link to us-east-1, configure BGP peering to use community tag 7224:7100
    • On the Direct Connect link to af-south-1, configure BGP peering to use community tag 7224:7300
    • On the Direct Connect BGP peer to us-east-1, set the local preference value to 200
    • On the Direct Connect BGP peer to af-south-1, set the local preference value to 50
  • B. • On the Direct Connect link to us-east-1, configure BGP peering to use community tag 7224:7300
    • On the Direct Connect link to af-south-1, configure BGP peering to use community tag 7224:7100
    • On the Direct Connect BGP peer to us-east-1, set the local preference value to 200
    • On the Direct Connect BGP peer to af-south-1, set the local preference value to 50
  • C. • On the Direct Connect link to us-east-1, configure BGP peering to use community tag 7224:7100
    • On the Direct Connect link to af-south-1, configure BGP peering to use community tag 7224:7300
    • On the Direct Connect BGP peer to us-east-1, set the local preference value to 50
    • On the Direct Connect BGP peer to af-south-1, set the local preference value to 200
  • D. • On the Direct Connect link to us-east-1, configure BGP peering to use community tag 7224:7300
    • On the Direct Connect link to af-south-1, configure BGP peering to use community tag 7224:7100
    • On the Direct Connect BGP peer to us-east-1, set the local preference value to 50
    • On the Direct Connect BGP peer to af-south-1, set the local preference value to 200
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Suggested Answer: B 🗳️

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Certified101
Highly Voted 1 year, 5 months ago
Selected Answer: B
B is correct
upvoted 8 times
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AzureDP900
Most Recent 3 weeks, 6 days ago
Selected Answer: B
The local preference value determines the relative importance of routes received from different BGP peers; a higher value indicates a more preferred path. By setting the local preference value to 50 on the Direct Connect peer to us-east-1 and 200 on the Direct Connect peer to af-south-1, the network engineer ensures that the af-south-1 link is preferred over the us-east-1 link unless the primary link fails. If the af-south-1 link goes down, BGP will use the us-east-1 link because it has a lower local preference value (50) than the af-south-1 link (200).
upvoted 1 times
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woorkim
1 month, 2 weeks ago
Selected Answer: B
higher LP, higher community tag# is preffered!
upvoted 1 times
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GaryQian
11 months, 2 weeks ago
Selected Answer: B
B should be correct
upvoted 2 times
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Fukat
1 year, 6 months ago
Selected Answer: B
https://docs.aws.amazon.com/directconnect/latest/UserGuide/routing-and-bgp.html
upvoted 3 times
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Neo00
1 year, 6 months ago
B. The higher the LOCAL_PREF value, the more preferred the route is.
upvoted 3 times
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