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Exam JN0-649 topic 1 question 2 discussion

Actual exam question from Juniper's JN0-649
Question #: 2
Topic #: 1
[All JN0-649 Questions]

Click the Exhibit button.
Referring to the exhibit, anycast RP is implemented to ensure multicast service availability. The source is currently sending multicast traffic using group 239.1.1.1 and R3 is receiving PIM register messages, but R2 does not have active source information.
In this scenario, what are two methods to receive the active source information on R2? (Choose two.)

  • A. Configure an RP set in PIM on R1, allowing R1 to forward PIM register messages to R2 and R3 in the set.
  • B. Configure an MSDP protocol between R2 and R3.
  • C. Configure an RP set in PIM on R2 and R3, allowing the RPs to forward PIM register messages to the other RPs in the set.
  • D. Configure an MSDP protocol between R1 and R2.
Show Suggested Answer Hide Answer
Suggested Answer: BC 🗳️
by mohdema at Dec. 6, 2022, 9:31 a.m.

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proptz
6 days, 15 hours ago
Selected Answer: AB
There is no doubt the B is correct answer. I am not sure why others selected C as it doesn't make sense. Why would you create an RP set on the RP itself to magically learn anything new from R1? R1 needs to be aware who the RPs are. Hence A is correct.
upvoted 1 times
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kim1276
2 months ago
b and c https://www.juniper.net/documentation/us/en/software/junos/multicast/topics/topic-map/mcast-pim-anycast-rp.html
upvoted 1 times
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song820902
11 months, 3 weeks ago
b and c
upvoted 1 times
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somanyquestions
1 year, 2 months ago
Selected Answer: BC
Anycast RP uses Multicast Source Discovery Protocol (MSDP) to discover and maintain a consistent view of the active sources. nclude the anycast-pim statement to configure anycast RP without MSDP (for example, if IPv6 is used for multicasting). The other RP routers that share the same IP address are configured using the rp-set statement. https://www.juniper.net/documentation/us/en/software/junos/multicast/topics/topic-map/mcast-pim-anycast-rp.html
upvoted 2 times
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sanalainen
2 years ago
Selected Answer: BC
MSDP or anycast-PIM with rp-set should be configured on all anycast RP routers. https://www.juniper.net/documentation/us/en/software/junos/multicast/topics/topic-map/mcast-pim-anycast-rp.html
upvoted 4 times
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penguin02007
2 years, 1 month ago
Should be B and C.
upvoted 2 times
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mohdema
2 years, 1 month ago
Configure a set of rendezvous point (RP) addresses for anycast RP. You can configure up to 15 RPs. The remaining statements are explained separately. See CLI Explorer. https://www.juniper.net/documentation/us/en/software/junos/multicast/topics/ref/statement/rp-set-edit-protocols-pim.html
upvoted 1 times
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