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Exam 400-007 topic 1 question 36 discussion

Actual exam question from Cisco's 400-007
Question #: 36
Topic #: 1
[All 400-007 Questions]

A multicast network is using Bidirectional PIM. Which two combined actions achieve high availability so that two RPs within the same network can act in a redundant manner? (Choose two.)

  • A. Advertise the two RP addresses in the routing protocol.
  • B. Use two phantom RP addresses.
  • C. Manipulate the multicast routing table by creating static mroutes to the two RPs.
  • D. Control routing to the two RPs through a longest match prefix.
  • E. Use Anycast RP based on MSDP peering between the two RPs.
  • F. Manipulate the administrative distance of the unicast routes to the two RPs.
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Suggested Answer: BD 🗳️

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qtg9rMGmj23tFm4n02X4
Highly Voted 2 years, 5 months ago
Selected Answer: BD
https://community.cisco.com/t5/networking-knowledge-base/rp-redundancy-with-pim-bidir-phantom-rp/ta-p/3117191
upvoted 9 times
Leon_Wang
2 years, 2 months ago
Agree,I used the feature with ACI IPN in a project
upvoted 1 times
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japer78
2 years, 5 months ago
'B' mentions '2 phantom RP IPs' though? I'd feel more comfortable with your option if it was referred to as 'a phantom RP address'
upvoted 3 times
ying162
2 years, 4 months ago
it did not mention two different RPs though.
upvoted 1 times
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i9t6
Most Recent 6 months, 3 weeks ago
Selected Answer: BD
https://learningnetwork.cisco.com/s/question/0D53i00000KsrGrCAJ/rendezvous-point-high-availability-mechanisms
upvoted 1 times
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Rollizo
1 year, 3 months ago
Selected Answer: BD
Anycast + MSDP is for PIM-SM PIM-BDIR use phantom RP
upvoted 1 times
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Rim007
1 year, 6 months ago
Selected Answer: BE
B. Use two phantom RP addresses. Phantom RPs can indeed provide redundancy. E. Use Anycast RP based on MSDP peering between the two RPs. Anycast RP is a widely acknowledged method for providing RP redundancy and enhancing multicast routing resilience.
upvoted 1 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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